Condensed Version of Public VL53L0X

Dependents:   ToF-Only-Tryout

Revision:
7:41cbc431e1f4
Parent:
6:1976f4afed97
Child:
8:abea9638127a
--- a/VL53L0X.cpp	Sat Mar 23 21:42:03 2019 +0000
+++ b/VL53L0X.cpp	Sun Mar 24 18:18:54 2019 +0000
@@ -10,7 +10,7 @@
  *
  * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
  *
- * Redistribution and use in source and binary forms, with or without modification,
+ * Redistribution and use in source and binary forms,with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
@@ -22,46 +22,69 @@
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES,INCLUDING,BUT NOT LIMITED TO,THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * FOR ANY DIRECT,INDIRECT,INCIDENTAL,SPECIAL,EXEMPLARY,OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING,BUT NOT LIMITED TO,PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE,DATA,OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY,WHETHER IN CONTRACT,STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * OF THIS SOFTWARE,EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
 */
 
+// Some example regex that were used to replace useless macros
+// \QVL53L0X_SETDEVICESPECIFICPARAMETER(\E([A-Z\d]+)[[:punct:]]([[:space:]]*)([A-Z\d_]+)\Q);\E
+// _device->DeviceSpecificParameters.\1 = \3; 
+
+// \QVL53L0X_GETDEVICESPECIFICPARAMETER(\E([A-Z\d]+)\Q);\E
+// _device->DeviceSpecificParameters.\1; 
+
+// \QVL53L0X_SETPARAMETERFIELD(\E([A-Z\d]+)[[:punct:]]([[:space:]]*)([A-Z\d_]+)\Q);\E
+// _device->CurrentParameters.\1 = \3; 
+
+// \QVL53L0X_GETPARAMETERFIELD(\E([A-Z\d]+)[[:punct:]]([[:space:]]*)([A-Z\d_]+)\Q);\E
+// \3 = _device->CurrentParameters.\1
+
+// \QVL53L0X_SETARRAYPARAMETERFIELD(\E([A-Z\d]+)[[:punct:]](\s*)([A-Z\d_]+)[[:punct:]](\s*)([A-Z\d_]+)\Q);\E
+// _device->CurrentParameters.\1[\3] = \5; 
+// is used to replace following macro for ex:
+// #define VL53L0X_SETARRAYPARAMETERFIELD(field, index, value) \
+//_device->CurrentParameters.field[index] = value
+
+// \QVL53L0X_GETARRAYPARAMETERFIELD(\E([A-Z\d]+)[[:punct:]](\s*)([A-Z\d_]+)[[:punct:]](\s*)([A-Z\d_]+)\Q);\E
+// \5 = _device->CurrentParameters.\1[\3]
+// is used to replace following macro for ex:
+// #define VL53L0X_GETARRAYPARAMETERFIELD(field, index, variable) \
+// variable = _device-> CurrentParameters.field[index]
+
+// \QPALDevDataSet(\E([A-Z\d]+)[[:punct:]]([[:space:]]*)([A-Z\d_]+)\Q);\E
+// _device->\1 = \3; 
+// is used to replace:
+// #define PALDevDataSet(field, data) (Dev->field)=(data)
+
+
+
 /* Includes */
 #include <stdlib.h>
-
 #include "VL53L0X.h"
-#include "VL53L0X_tuning.h"
-
-#define REF_ARRAY_SPAD_0  0
-#define REF_ARRAY_SPAD_5  5
-#define REF_ARRAY_SPAD_10 10
-
-uint32_t refArrayQuadrants[4] = {REF_ARRAY_SPAD_10, REF_ARRAY_SPAD_5,
-                                 REF_ARRAY_SPAD_0, REF_ARRAY_SPAD_5 };
-
-VL53L0X_Error VL53L0X::VL53L0X_device_read_strobe(VL53L0X_DEV dev)
+
+VL53L0X_Error VL53L0X::VL53L0X_device_read_strobe()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t strobe;
     uint32_t loop_nb;
 
-    status |= VL53L0X_write_byte(dev, 0x83, 0x00);
+    status |= VL53L0X_write_byte(0x83,0x00);
 
     /* polling
      * use timeout to avoid deadlock*/
     if (status == VL53L0X_ERROR_NONE) {
         loop_nb = 0;
         do {
-            status = VL53L0X_read_byte(dev, 0x83, &strobe);
+            status = VL53L0X_read_byte(0x83,&strobe);
             if ((strobe != 0x00) || status != VL53L0X_ERROR_NONE) {
                 break;
             }
@@ -74,12 +97,12 @@
         }
     }
 
-    status |= VL53L0X_write_byte(dev, 0x83, 0x01);
+    status |= VL53L0X_write_byte(0x83,0x01);
 
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_info_from_device(VL53L0X_DEV dev, uint8_t option)
+VL53L0X_Error VL53L0X::VL53L0X_get_info_from_device(uint8_t option)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t byte;
@@ -103,39 +126,39 @@
     int i;
  
 
-    read_data_from_device_done = VL53L0X_GETDEVICESPECIFICPARAMETER(dev,
-                                 ReadDataFromDeviceDone);
+    read_data_from_device_done = _device->DeviceSpecificParameters.ReadDataFromDeviceDone; 
+    read_data_from_device_done = _device->DeviceSpecificParameters.ReadDataFromDeviceDone; 
 
     /* This access is done only once after that a GetDeviceInfo or
      * datainit is done*/
     if (read_data_from_device_done != 7) {
 
-        status |= VL53L0X_write_byte(dev, 0x80, 0x01);
-        status |= VL53L0X_write_byte(dev, 0xFF, 0x01);
-        status |= VL53L0X_write_byte(dev, 0x00, 0x00);
-
-        status |= VL53L0X_write_byte(dev, 0xFF, 0x06);
-        status |= VL53L0X_read_byte(dev, 0x83, &byte);
-        status |= VL53L0X_write_byte(dev, 0x83, byte | 4);
-        status |= VL53L0X_write_byte(dev, 0xFF, 0x07);
-        status |= VL53L0X_write_byte(dev, 0x81, 0x01);
-
-        status |= VL53L0X_polling_delay(dev);
-
-        status |= VL53L0X_write_byte(dev, 0x80, 0x01);
+        status |= VL53L0X_write_byte(0x80,0x01);
+        status |= VL53L0X_write_byte(0xFF,0x01);
+        status |= VL53L0X_write_byte(0x00,0x00);
+
+        status |= VL53L0X_write_byte(0xFF,0x06);
+        status |= VL53L0X_read_byte(0x83,&byte);
+        status |= VL53L0X_write_byte(0x83,byte | 4);
+        status |= VL53L0X_write_byte(0xFF,0x07);
+        status |= VL53L0X_write_byte(0x81,0x01);
+
+        status |= VL53L0X_polling_delay();
+
+        status |= VL53L0X_write_byte(0x80,0x01);
 
         if (((option & 1) == 1) &&
                 ((read_data_from_device_done & 1) == 0)) {
-            status |= VL53L0X_write_byte(dev, 0x94, 0x6b);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x6b);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
             reference_spad_count = (uint8_t)((tmp_dword >> 8) & 0x07f);
             reference_spad_type  = (uint8_t)((tmp_dword >> 15) & 0x01);
 
-            status |= VL53L0X_write_byte(dev, 0x94, 0x24);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x24);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
 
             nvm_ref_good_spad_map[0] = (uint8_t)((tmp_dword >> 24)
@@ -146,9 +169,9 @@
                                                  & 0xff);
             nvm_ref_good_spad_map[3] = (uint8_t)(tmp_dword & 0xff);
 
-            status |= VL53L0X_write_byte(dev, 0x94, 0x25);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x25);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
             nvm_ref_good_spad_map[4] = (uint8_t)((tmp_dword >> 24)
                                                  & 0xff);
@@ -159,17 +182,17 @@
         if (((option & 2) == 2) &&
                 ((read_data_from_device_done & 2) == 0)) {
 
-            status |= VL53L0X_write_byte(dev, 0x94, 0x02);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_byte(dev, 0x90, &module_id);
-
-            status |= VL53L0X_write_byte(dev, 0x94, 0x7B);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_byte(dev, 0x90, &revision);
-
-            status |= VL53L0X_write_byte(dev, 0x94, 0x77);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x02);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_byte(0x90,&module_id);
+
+            status |= VL53L0X_write_byte(0x94,0x7B);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_byte(0x90,&revision);
+
+            status |= VL53L0X_write_byte(0x94,0x77);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
             product_id[0] = (char)((tmp_dword >> 25) & 0x07f);
             product_id[1] = (char)((tmp_dword >> 18) & 0x07f);
@@ -178,9 +201,9 @@
 
             byte = (uint8_t)((tmp_dword & 0x00f) << 3);
 
-            status |= VL53L0X_write_byte(dev, 0x94, 0x78);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x78);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
             product_id[4] = (char)(byte +
                                    ((tmp_dword >> 29) & 0x07f));
@@ -191,11 +214,11 @@
 
             byte = (uint8_t)((tmp_dword & 0x001) << 6);
 
-            status |= VL53L0X_write_byte(dev, 0x94, 0x79);
-
-            status |= VL53L0X_device_read_strobe(dev);
-
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x79);
+
+            status |= VL53L0X_device_read_strobe();
+
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
             product_id[9] = (char)(byte +
                                    ((tmp_dword >> 26) & 0x07f));
@@ -205,11 +228,11 @@
 
             byte = (uint8_t)((tmp_dword & 0x01f) << 2);
 
-            status |= VL53L0X_write_byte(dev, 0x94, 0x7A);
-
-            status |= VL53L0X_device_read_strobe(dev);
-
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x7A);
+
+            status |= VL53L0X_device_read_strobe();
+
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
             product_id[13] = (char)(byte +
                                     ((tmp_dword >> 30) & 0x07f));
@@ -224,52 +247,52 @@
         if (((option & 4) == 4) &&
                 ((read_data_from_device_done & 4) == 0)) {
 
-            status |= VL53L0X_write_byte(dev, 0x94, 0x7B);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &part_uid_upper);
-
-            status |= VL53L0X_write_byte(dev, 0x94, 0x7C);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &part_uid_lower);
-
-            status |= VL53L0X_write_byte(dev, 0x94, 0x73);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x7B);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&part_uid_upper);
+
+            status |= VL53L0X_write_byte(0x94,0x7C);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&part_uid_lower);
+
+            status |= VL53L0X_write_byte(0x94,0x73);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
             signal_rate_meas_fixed1104_400_mm = (tmp_dword &
                                                  0x0000000ff) << 8;
 
-            status |= VL53L0X_write_byte(dev, 0x94, 0x74);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x74);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
             signal_rate_meas_fixed1104_400_mm |= ((tmp_dword &
                                                    0xff000000) >> 24);
 
-            status |= VL53L0X_write_byte(dev, 0x94, 0x75);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x75);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
             dist_meas_fixed1104_400_mm = (tmp_dword & 0x0000000ff)
                                          << 8;
 
-            status |= VL53L0X_write_byte(dev, 0x94, 0x76);
-            status |= VL53L0X_device_read_strobe(dev);
-            status |= VL53L0X_read_dword(dev, 0x90, &tmp_dword);
+            status |= VL53L0X_write_byte(0x94,0x76);
+            status |= VL53L0X_device_read_strobe();
+            status |= VL53L0X_read_dword(0x90,&tmp_dword);
 
             dist_meas_fixed1104_400_mm |= ((tmp_dword & 0xff000000)
                                            >> 24);
         }
 
-        status |= VL53L0X_write_byte(dev, 0x81, 0x00);
-        status |= VL53L0X_write_byte(dev, 0xFF, 0x06);
-        status |= VL53L0X_read_byte(dev, 0x83, &byte);
-        status |= VL53L0X_write_byte(dev, 0x83, byte & 0xfb);
-        status |= VL53L0X_write_byte(dev, 0xFF, 0x01);
-        status |= VL53L0X_write_byte(dev, 0x00, 0x01);
-
-        status |= VL53L0X_write_byte(dev, 0xFF, 0x00);
-        status |= VL53L0X_write_byte(dev, 0x80, 0x00);
+        status |= VL53L0X_write_byte(0x81,0x00);
+        status |= VL53L0X_write_byte(0xFF,0x06);
+        status |= VL53L0X_read_byte(0x83,&byte);
+        status |= VL53L0X_write_byte(0x83,byte & 0xfb);
+        status |= VL53L0X_write_byte(0xFF,0x01);
+        status |= VL53L0X_write_byte(0x00,0x01);
+
+        status |= VL53L0X_write_byte(0xFF,0x00);
+        status |= VL53L0X_write_byte(0x80,0x00);
     }
 
     if ((status == VL53L0X_ERROR_NONE) &&
@@ -277,47 +300,37 @@
         /* Assign to variable if status is ok */
         if (((option & 1) == 1) &&
                 ((read_data_from_device_done & 1) == 0)) {
-            VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                               ReferenceSpadCount, reference_spad_count);
-
-            VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                               ReferenceSpadType, reference_spad_type);
+            _device->DeviceSpecificParameters.ReferenceSpadCount=reference_spad_count;
+            _device->DeviceSpecificParameters.ReferenceSpadType=reference_spad_type;
 
             for (i = 0; i < VL53L0X_REF_SPAD_BUFFER_SIZE; i++) {
-                dev->SpadData.RefGoodSpadMap[i] =
+                _device->SpadData.RefGoodSpadMap[i] =
                     nvm_ref_good_spad_map[i];
             }
         }
 
         if (((option & 2) == 2) &&
                 ((read_data_from_device_done & 2) == 0)) {
-            VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                               ModuleId, module_id);
-
-            VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                               Revision, revision);
-
-            product_id_tmp = VL53L0X_GETDEVICESPECIFICPARAMETER(dev,
-                             ProductId);
-            strcpy(product_id_tmp, product_id);
+            _device->DeviceSpecificParameters.ModuleId = module_id;
+
+            _device->DeviceSpecificParameters.Revision = revision;
+
+            product_id_tmp = _device->DeviceSpecificParameters.ProductId; 
+            strcpy(product_id_tmp,product_id);
 
         }
 
         if (((option & 4) == 4) &&
                 ((read_data_from_device_done & 4) == 0)) {
-            VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                               PartUIDUpper, part_uid_upper);
-
-            VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                               PartUIDLower, part_uid_lower);
+            _device->DeviceSpecificParameters.PartUIDUpper = part_uid_upper;
+
+            _device->DeviceSpecificParameters.PartUIDLower = part_uid_lower;
 
             signal_rate_meas_fixed400_mm_fix =
-                VL53L0X_FIXPOINT97TOFIXPOINT1616(
-                    signal_rate_meas_fixed1104_400_mm);
-
-            VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                               SignalRateMeasFixed400mm,
-                                               signal_rate_meas_fixed400_mm_fix);
+                VL53L0X_FIXPOINT97TOFIXPOINT1616(signal_rate_meas_fixed1104_400_mm);
+
+            _device->DeviceSpecificParameters.SignalRateMeasFixed400mm = signal_rate_meas_fixed400_mm_fix;
+            _device->DeviceSpecificParameters.SignalRateMeasFixed400mm = signal_rate_meas_fixed400_mm_fix;
 
             offset_micro_meters = 0;
             if (dist_meas_fixed1104_400_mm != 0) {
@@ -329,21 +342,17 @@
                 offset_micro_meters *= -1;
             }
 
-            PALDevDataSet(dev,
-                          Part2PartOffsetAdjustmentNVMMicroMeter,
-                          offset_micro_meters);
+            _device->Part2PartOffsetAdjustmentNVMMicroMeter = offset_micro_meters; 
         }
         byte = (uint8_t)(read_data_from_device_done | option);
-        VL53L0X_SETDEVICESPECIFICPARAMETER(dev, ReadDataFromDeviceDone,
-                                           byte);
+        _device->DeviceSpecificParameters.ReadDataFromDeviceDone = byte;
     }
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::wrapped_VL53L0X_get_offset_calibration_data_micro_meter(VL53L0X_DEV dev,
-        int32_t *p_offset_calibration_data_micro_meter)
+VL53L0X_Error VL53L0X::wrapped_VL53L0X_get_offset_calibration_data_micro_meter(int32_t *p_offset_calibration_data_micro_meter)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint16_t range_offset_register;
@@ -352,8 +361,7 @@
 
     /* Note that offset has 10.2 format */
 
-    status = VL53L0X_read_word(dev,
-                               VL53L0X_REG_ALGO_PART_TO_PART_RANGE_OFFSET_MM,
+    status = VL53L0X_read_word(VL53L0X_REG_ALGO_PART_TO_PART_RANGE_OFFSET_MM,
                                &range_offset_register);
 
     if (status == VL53L0X_ERROR_NONE) {
@@ -374,21 +382,18 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_offset_calibration_data_micro_meter(VL53L0X_DEV dev,
-        int32_t *p_offset_calibration_data_micro_meter)
+VL53L0X_Error VL53L0X::VL53L0X_get_offset_calibration_data_micro_meter(int32_t *p_offset_calibration_data_micro_meter)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = wrapped_VL53L0X_get_offset_calibration_data_micro_meter(dev,
-             p_offset_calibration_data_micro_meter);
+    status = wrapped_VL53L0X_get_offset_calibration_data_micro_meter(p_offset_calibration_data_micro_meter);
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::wrapped_VL53L0X_set_offset_calibration_data_micro_meter(VL53L0X_DEV dev,
-        int32_t offset_calibration_data_micro_meter)
+VL53L0X_Error VL53L0X::wrapped_VL53L0X_set_offset_calibration_data_micro_meter(int32_t offset_calibration_data_micro_meter)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     int32_t c_max_offset_micro_meter = 511000;
@@ -419,28 +424,25 @@
             offset_calibration_data_micro_meter / 250;
     }
 
-    status = VL53L0X_write_word(dev,
-                                VL53L0X_REG_ALGO_PART_TO_PART_RANGE_OFFSET_MM,
+    status = VL53L0X_write_word(VL53L0X_REG_ALGO_PART_TO_PART_RANGE_OFFSET_MM,
                                 encoded_offset_val);
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_set_offset_calibration_data_micro_meter(VL53L0X_DEV dev,
-        int32_t offset_calibration_data_micro_meter)
+VL53L0X_Error VL53L0X::VL53L0X_set_offset_calibration_data_micro_meter(int32_t offset_calibration_data_micro_meter)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = wrapped_VL53L0X_set_offset_calibration_data_micro_meter(dev,
-             offset_calibration_data_micro_meter);
+    status = wrapped_VL53L0X_set_offset_calibration_data_micro_meter(offset_calibration_data_micro_meter);
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_apply_offset_adjustment(VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::VL53L0X_apply_offset_adjustment()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     int32_t corrected_offset_micro_meters;
@@ -448,52 +450,43 @@
 
     /* if we run on this function we can read all the NVM info
      * used by the API */
-    status = VL53L0X_get_info_from_device(dev, 7);
+    status = VL53L0X_get_info_from_device(7);
 
     /* Read back current device offset */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_get_offset_calibration_data_micro_meter(dev,
-                 &current_offset_micro_meters);
+        status = VL53L0X_get_offset_calibration_data_micro_meter(&current_offset_micro_meters);
     }
 
     /* Apply Offset Adjustment derived from 400mm measurements */
     if (status == VL53L0X_ERROR_NONE) {
 
         /* Store initial device offset */
-        PALDevDataSet(dev, Part2PartOffsetNVMMicroMeter,
-                      current_offset_micro_meters);
+        _device->Part2PartOffsetNVMMicroMeter = current_offset_micro_meters; 
 
         corrected_offset_micro_meters = current_offset_micro_meters +
-                                        (int32_t)PALDevDataGet(dev,
-                                                Part2PartOffsetAdjustmentNVMMicroMeter);
-
-        status = VL53L0X_set_offset_calibration_data_micro_meter(dev,
-                 corrected_offset_micro_meters);
-
-        /* store current, adjusted offset */
+                                        (int32_t) _device->Part2PartOffsetAdjustmentNVMMicroMeter;
+
+        status = VL53L0X_set_offset_calibration_data_micro_meter(corrected_offset_micro_meters);
+
+        /* store current,adjusted offset */
         if (status == VL53L0X_ERROR_NONE) {
-            VL53L0X_SETPARAMETERFIELD(dev, RangeOffsetMicroMeters,
-                                      corrected_offset_micro_meters);
+            _device->CurrentParameters.RangeOffsetMicroMeters = corrected_offset_micro_meters; 
         }
     }
 
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_device_mode(VL53L0X_DEV dev,
-        VL53L0X_DeviceModes *p_device_mode)
+VL53L0X_Error VL53L0X::VL53L0X_get_device_mode(VL53L0X_DeviceModes *p_device_mode)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
-
-    VL53L0X_GETPARAMETERFIELD(dev, DeviceMode, *p_device_mode);
-
+    *p_device_mode = _device->CurrentParameters.DeviceMode;
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_inter_measurement_period_milli_seconds(VL53L0X_DEV dev,
-        uint32_t *p_inter_measurement_period_milli_seconds)
+VL53L0X_Error VL53L0X::VL53L0X_get_inter_measurement_period_milli_seconds(uint32_t *p_inter_measurement_period_milli_seconds)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint16_t osc_calibrate_val;
@@ -501,12 +494,11 @@
 
     
 
-    status = VL53L0X_read_word(dev, VL53L0X_REG_OSC_CALIBRATE_VAL,
+    status = VL53L0X_read_word(VL53L0X_REG_OSC_CALIBRATE_VAL,
                                &osc_calibrate_val);
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_read_dword(dev,
-                                    VL53L0X_REG_SYSTEM_INTERMEASUREMENT_PERIOD,
+        status = VL53L0X_read_dword(VL53L0X_REG_SYSTEM_INTERMEASUREMENT_PERIOD,
                                     &im_period_milli_seconds);
     }
 
@@ -515,17 +507,15 @@
             *p_inter_measurement_period_milli_seconds =
                 im_period_milli_seconds / osc_calibrate_val;
         }
-        VL53L0X_SETPARAMETERFIELD(dev,
-                                  InterMeasurementPeriodMilliSeconds,
-                                  *p_inter_measurement_period_milli_seconds);
+        _device->CurrentParameters.InterMeasurementPeriodMilliSeconds=
+                                  *p_inter_measurement_period_milli_seconds;
     }
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_x_talk_compensation_rate_mega_cps(VL53L0X_DEV dev,
-        FixPoint1616_t *p_xtalk_compensation_rate_mega_cps)
+VL53L0X_Error VL53L0X::VL53L0X_get_x_talk_compensation_rate_mega_cps(FixPoint1616_t *p_xtalk_compensation_rate_mega_cps)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint16_t value;
@@ -533,23 +523,18 @@
 
     
 
-    status = VL53L0X_read_word(dev,
-                               VL53L0X_REG_CROSSTALK_COMPENSATION_PEAK_RATE_MCPS, (uint16_t *)&value);
+    status = VL53L0X_read_word(VL53L0X_REG_CROSSTALK_COMPENSATION_PEAK_RATE_MCPS,(uint16_t *)&value);
     if (status == VL53L0X_ERROR_NONE) {
         if (value == 0) {
             /* the Xtalk is disabled return value from memory */
-            VL53L0X_GETPARAMETERFIELD(dev,
-                                      XTalkCompensationRateMegaCps, temp_fix1616);
+            temp_fix1616 = _device->CurrentParameters.XTalkCompensationRateMegaCps; 
             *p_xtalk_compensation_rate_mega_cps = temp_fix1616;
-            VL53L0X_SETPARAMETERFIELD(dev, XTalkCompensationEnable,
-                                      0);
+            _device->CurrentParameters.XTalkCompensationEnable = 0; 
         } else {
             temp_fix1616 = VL53L0X_FIXPOINT313TOFIXPOINT1616(value);
             *p_xtalk_compensation_rate_mega_cps = temp_fix1616;
-            VL53L0X_SETPARAMETERFIELD(dev,
-                                      XTalkCompensationRateMegaCps, temp_fix1616);
-            VL53L0X_SETPARAMETERFIELD(dev, XTalkCompensationEnable,
-                                      1);
+            _device->CurrentParameters.XTalkCompensationRateMegaCps = temp_fix1616; 
+            _device->CurrentParameters.XTalkCompensationEnable = 1; 
         }
     }
 
@@ -557,7 +542,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_limit_check_value(VL53L0X_DEV dev, uint16_t limit_check_id,
+VL53L0X_Error VL53L0X::VL53L0X_get_limit_check_value(uint16_t limit_check_id,
         FixPoint1616_t *p_limit_check_value)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -571,14 +556,12 @@
 
         case VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE:
             /* internal computation: */
-            VL53L0X_GETARRAYPARAMETERFIELD(dev, LimitChecksValue,
-                                           VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE, temp_fix1616);
+            temp_fix1616 = _device->CurrentParameters.LimitChecksValue[VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE];
             enable_zero_value = 0;
             break;
 
         case VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE:
-            status = VL53L0X_read_word(dev,
-                                       VL53L0X_REG_FINAL_RANGE_CONFIG_MIN_COUNT_RATE_RTN_LIMIT,
+            status = VL53L0X_read_word(VL53L0X_REG_FINAL_RANGE_CONFIG_MIN_COUNT_RATE_RTN_LIMIT,
                                        &temp16);
             if (status == VL53L0X_ERROR_NONE) {
                 temp_fix1616 = VL53L0X_FIXPOINT97TOFIXPOINT1616(temp16);
@@ -590,22 +573,19 @@
 
         case VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP:
             /* internal computation: */
-            VL53L0X_GETARRAYPARAMETERFIELD(dev, LimitChecksValue,
-                                           VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP, temp_fix1616);
+            temp_fix1616 = _device->CurrentParameters.LimitChecksValue[VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP];
             enable_zero_value = 0;
             break;
 
         case VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD:
             /* internal computation: */
-            VL53L0X_GETARRAYPARAMETERFIELD(dev, LimitChecksValue,
-                                           VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD, temp_fix1616);
+            temp_fix1616 = _device->CurrentParameters.LimitChecksValue[VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD];
             enable_zero_value = 0;
             break;
 
         case VL53L0X_CHECKENABLE_SIGNAL_RATE_MSRC:
         case VL53L0X_CHECKENABLE_SIGNAL_RATE_PRE_RANGE:
-            status = VL53L0X_read_word(dev,
-                                       VL53L0X_REG_PRE_RANGE_MIN_COUNT_RATE_RTN_LIMIT,
+            status = VL53L0X_read_word(VL53L0X_REG_PRE_RANGE_MIN_COUNT_RATE_RTN_LIMIT,
                                        &temp16);
             if (status == VL53L0X_ERROR_NONE) {
                 temp_fix1616 = VL53L0X_FIXPOINT97TOFIXPOINT1616(temp16);
@@ -626,19 +606,14 @@
 
             if (temp_fix1616 == 0) {
                 /* disabled: return value from memory */
-                VL53L0X_GETARRAYPARAMETERFIELD(dev,
-                                               LimitChecksValue, limit_check_id,
-                                               temp_fix1616);
+                temp_fix1616 = _device->CurrentParameters.LimitChecksValue[limit_check_id];
                 *p_limit_check_value = temp_fix1616;
-                VL53L0X_SETARRAYPARAMETERFIELD(dev,
-                                               LimitChecksEnable, limit_check_id, 0);
+                 _device->CurrentParameters.LimitChecksEnable[limit_check_id] = 0; 
+                 _device->CurrentParameters.LimitChecksEnable[limit_check_id] = 0; 
             } else {
                 *p_limit_check_value = temp_fix1616;
-                VL53L0X_SETARRAYPARAMETERFIELD(dev,
-                                               LimitChecksValue, limit_check_id,
-                                               temp_fix1616);
-                VL53L0X_SETARRAYPARAMETERFIELD(dev,
-                                               LimitChecksEnable, limit_check_id, 1);
+                 _device->CurrentParameters.LimitChecksValue[limit_check_id] = temp_fix1616; 
+                 _device->CurrentParameters.LimitChecksEnable[limit_check_id] = 1; 
             }
         } else {
             *p_limit_check_value = temp_fix1616;
@@ -650,7 +625,7 @@
 
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_limit_check_enable(VL53L0X_DEV dev, uint16_t limit_check_id,
+VL53L0X_Error VL53L0X::VL53L0X_get_limit_check_enable(uint16_t limit_check_id,
         uint8_t *p_limit_check_enable)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -662,8 +637,7 @@
         status = VL53L0X_ERROR_INVALID_PARAMS;
         *p_limit_check_enable = 0;
     } else {
-        VL53L0X_GETARRAYPARAMETERFIELD(dev, LimitChecksEnable,
-                                       limit_check_id, temp8);
+        temp8 = _device->CurrentParameters.LimitChecksEnable[limit_check_id];
         *p_limit_check_enable = temp8;
     }
 
@@ -671,17 +645,16 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_wrap_around_check_enable(VL53L0X_DEV dev,
-        uint8_t *p_wrap_around_check_enable)
+VL53L0X_Error VL53L0X::VL53L0X_get_wrap_around_check_enable(uint8_t *p_wrap_around_check_enable)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t data;
 
     
 
-    status = VL53L0X_read_byte(dev, VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG, &data);
+    status = VL53L0X_read_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,&data);
     if (status == VL53L0X_ERROR_NONE) {
-        PALDevDataSet(dev, SequenceConfig, data);
+        _device->SequenceConfig = data; 
         if (data & (0x01 << 7)) {
             *p_wrap_around_check_enable = 0x01;
         } else {
@@ -689,16 +662,15 @@
         }
     }
     if (status == VL53L0X_ERROR_NONE) {
-        VL53L0X_SETPARAMETERFIELD(dev, WrapAroundCheckEnable,
-                                  *p_wrap_around_check_enable);
+        _device->CurrentParameters.WrapAroundCheckEnable=
+                                  *p_wrap_around_check_enable;
     }
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::sequence_step_enabled(VL53L0X_DEV dev,
-        VL53L0X_SequenceStepId sequence_step_id, uint8_t sequence_config,
+VL53L0X_Error VL53L0X::sequence_step_enabled(VL53L0X_SequenceStepId sequence_step_id,uint8_t sequence_config,
         uint8_t *p_sequence_step_enabled)
 {
     VL53L0X_Error Status = VL53L0X_ERROR_NONE;
@@ -729,39 +701,33 @@
     return Status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_sequence_step_enables(VL53L0X_DEV dev,
-        VL53L0X_SchedulerSequenceSteps_t *p_scheduler_sequence_steps)
+VL53L0X_Error VL53L0X::VL53L0X_get_sequence_step_enables(VL53L0X_SchedulerSequenceSteps_t *p_scheduler_sequence_steps)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t sequence_config = 0;
     
 
-    status = VL53L0X_read_byte(dev, VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
+    status = VL53L0X_read_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
                                &sequence_config);
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = sequence_step_enabled(dev,
-                                       VL53L0X_SEQUENCESTEP_TCC, sequence_config,
+        status = sequence_step_enabled(VL53L0X_SEQUENCESTEP_TCC,sequence_config,
                                        &p_scheduler_sequence_steps->TccOn);
     }
     if (status == VL53L0X_ERROR_NONE) {
-        status = sequence_step_enabled(dev,
-                                       VL53L0X_SEQUENCESTEP_DSS, sequence_config,
+        status = sequence_step_enabled(VL53L0X_SEQUENCESTEP_DSS,sequence_config,
                                        &p_scheduler_sequence_steps->DssOn);
     }
     if (status == VL53L0X_ERROR_NONE) {
-        status = sequence_step_enabled(dev,
-                                       VL53L0X_SEQUENCESTEP_MSRC, sequence_config,
+        status = sequence_step_enabled(VL53L0X_SEQUENCESTEP_MSRC,sequence_config,
                                        &p_scheduler_sequence_steps->MsrcOn);
     }
     if (status == VL53L0X_ERROR_NONE) {
-        status = sequence_step_enabled(dev,
-                                       VL53L0X_SEQUENCESTEP_PRE_RANGE, sequence_config,
+        status = sequence_step_enabled(VL53L0X_SEQUENCESTEP_PRE_RANGE,sequence_config,
                                        &p_scheduler_sequence_steps->PreRangeOn);
     }
     if (status == VL53L0X_ERROR_NONE) {
-        status = sequence_step_enabled(dev,
-                                       VL53L0X_SEQUENCESTEP_FINAL_RANGE, sequence_config,
+        status = sequence_step_enabled(VL53L0X_SEQUENCESTEP_FINAL_RANGE,sequence_config,
                                        &p_scheduler_sequence_steps->FinalRangeOn);
     }
 
@@ -798,8 +764,7 @@
 }
 
 
-VL53L0X_Error VL53L0X::wrapped_VL53L0X_set_vcsel_pulse_period(VL53L0X_DEV dev,
-        VL53L0X_VcselPeriod vcsel_period_type, uint8_t vcsel_pulse_period_pclk)
+VL53L0X_Error VL53L0X::wrapped_VL53L0X_set_vcsel_pulse_period(VL53L0X_VcselPeriod vcsel_period_type,uint8_t vcsel_pulse_period_pclk)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t vcsel_period_reg;
@@ -841,120 +806,92 @@
         /* Set phase check limits */
         if (vcsel_pulse_period_pclk == 12) {
 
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_HIGH,
+            status = VL53L0X_write_byte(VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_HIGH,
                                         0x18);
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_LOW,
+            status = VL53L0X_write_byte(VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_LOW,
                                         0x08);
         } else if (vcsel_pulse_period_pclk == 14) {
 
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_HIGH,
+            status = VL53L0X_write_byte(VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_HIGH,
                                         0x30);
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_LOW,
+            status = VL53L0X_write_byte(VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_LOW,
                                         0x08);
         } else if (vcsel_pulse_period_pclk == 16) {
 
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_HIGH,
+            status = VL53L0X_write_byte(VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_HIGH,
                                         0x40);
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_LOW,
+            status = VL53L0X_write_byte(VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_LOW,
                                         0x08);
         } else if (vcsel_pulse_period_pclk == 18) {
 
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_HIGH,
+            status = VL53L0X_write_byte(VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_HIGH,
                                         0x50);
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_LOW,
+            status = VL53L0X_write_byte(VL53L0X_REG_PRE_RANGE_CONFIG_VALID_PHASE_LOW,
                                         0x08);
         }
     } else if (vcsel_period_type == VL53L0X_VCSEL_PERIOD_FINAL_RANGE) {
 
         if (vcsel_pulse_period_pclk == 8) {
 
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_HIGH,
+            status = VL53L0X_write_byte(VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_HIGH,
                                         0x10);
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_LOW,
+            status = VL53L0X_write_byte(VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_LOW,
                                         0x08);
 
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_GLOBAL_CONFIG_VCSEL_WIDTH, 0x02);
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_ALGO_PHASECAL_CONFIG_TIMEOUT, 0x0C);
-
-            status |= VL53L0X_write_byte(dev, 0xff, 0x01);
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_ALGO_PHASECAL_LIM,
+            status |= VL53L0X_write_byte(VL53L0X_REG_GLOBAL_CONFIG_VCSEL_WIDTH,0x02);
+            status |= VL53L0X_write_byte(VL53L0X_REG_ALGO_PHASECAL_CONFIG_TIMEOUT,0x0C);
+
+            status |= VL53L0X_write_byte(0xff,0x01);
+            status |= VL53L0X_write_byte(VL53L0X_REG_ALGO_PHASECAL_LIM,
                                          0x30);
-            status |= VL53L0X_write_byte(dev, 0xff, 0x00);
+            status |= VL53L0X_write_byte(0xff,0x00);
         } else if (vcsel_pulse_period_pclk == 10) {
 
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_HIGH,
+            status = VL53L0X_write_byte(VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_HIGH,
                                         0x28);
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_LOW,
+            status = VL53L0X_write_byte(VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_LOW,
                                         0x08);
 
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_GLOBAL_CONFIG_VCSEL_WIDTH, 0x03);
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_ALGO_PHASECAL_CONFIG_TIMEOUT, 0x09);
-
-            status |= VL53L0X_write_byte(dev, 0xff, 0x01);
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_ALGO_PHASECAL_LIM,
+            status |= VL53L0X_write_byte(VL53L0X_REG_GLOBAL_CONFIG_VCSEL_WIDTH,0x03);
+            status |= VL53L0X_write_byte(VL53L0X_REG_ALGO_PHASECAL_CONFIG_TIMEOUT,0x09);
+
+            status |= VL53L0X_write_byte(0xff,0x01);
+            status |= VL53L0X_write_byte(VL53L0X_REG_ALGO_PHASECAL_LIM,
                                          0x20);
-            status |= VL53L0X_write_byte(dev, 0xff, 0x00);
+            status |= VL53L0X_write_byte(0xff,0x00);
         } else if (vcsel_pulse_period_pclk == 12) {
 
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_HIGH,
+            status = VL53L0X_write_byte(VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_HIGH,
                                         0x38);
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_LOW,
+            status = VL53L0X_write_byte(VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_LOW,
                                         0x08);
 
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_GLOBAL_CONFIG_VCSEL_WIDTH, 0x03);
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_ALGO_PHASECAL_CONFIG_TIMEOUT, 0x08);
-
-            status |= VL53L0X_write_byte(dev, 0xff, 0x01);
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_ALGO_PHASECAL_LIM,
+            status |= VL53L0X_write_byte(VL53L0X_REG_GLOBAL_CONFIG_VCSEL_WIDTH,0x03);
+            status |= VL53L0X_write_byte(VL53L0X_REG_ALGO_PHASECAL_CONFIG_TIMEOUT,0x08);
+
+            status |= VL53L0X_write_byte(0xff,0x01);
+            status |= VL53L0X_write_byte(VL53L0X_REG_ALGO_PHASECAL_LIM,
                                          0x20);
-            status |= VL53L0X_write_byte(dev, 0xff, 0x00);
+            status |= VL53L0X_write_byte(0xff,0x00);
         } else if (vcsel_pulse_period_pclk == 14) {
 
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_HIGH,
+            status = VL53L0X_write_byte(VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_HIGH,
                                         0x048);
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_LOW,
+            status = VL53L0X_write_byte(VL53L0X_REG_FINAL_RANGE_CONFIG_VALID_PHASE_LOW,
                                         0x08);
 
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_GLOBAL_CONFIG_VCSEL_WIDTH, 0x03);
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_ALGO_PHASECAL_CONFIG_TIMEOUT, 0x07);
-
-            status |= VL53L0X_write_byte(dev, 0xff, 0x01);
-            status |= VL53L0X_write_byte(dev,
-                                         VL53L0X_REG_ALGO_PHASECAL_LIM,
+            status |= VL53L0X_write_byte(VL53L0X_REG_GLOBAL_CONFIG_VCSEL_WIDTH,0x03);
+            status |= VL53L0X_write_byte(VL53L0X_REG_ALGO_PHASECAL_CONFIG_TIMEOUT,0x07);
+
+            status |= VL53L0X_write_byte(0xff,0x01);
+            status |= VL53L0X_write_byte(VL53L0X_REG_ALGO_PHASECAL_LIM,
                                          0x20);
-            status |= VL53L0X_write_byte(dev, 0xff, 0x00);
+            status |= VL53L0X_write_byte(0xff,0x00);
         }
     }
 
 
-    /* Re-calculate and apply timeouts, in macro periods */
+    /* Re-calculate and apply timeouts,in macro periods */
 
     if (status == VL53L0X_ERROR_NONE) {
         vcsel_period_reg = lv53l0x_encode_vcsel_period((uint8_t)
@@ -962,120 +899,98 @@
 
         /* When the VCSEL period for the pre or final range is changed,
         * the corresponding timeout must be read from the device using
-        * the current VCSEL period, then the new VCSEL period can be
+        * the current VCSEL period,then the new VCSEL period can be
         * applied. The timeout then must be written back to the device
         * using the new VCSEL period.
         *
-        * For the MSRC timeout, the same applies - this timeout being
+        * For the MSRC timeout,the same applies - this timeout being
         * dependant on the pre-range vcsel period.
         */
         switch (vcsel_period_type) {
             case VL53L0X_VCSEL_PERIOD_PRE_RANGE:
-                status = get_sequence_step_timeout(dev,
-                                                   VL53L0X_SEQUENCESTEP_PRE_RANGE,
+                status = get_sequence_step_timeout(VL53L0X_SEQUENCESTEP_PRE_RANGE,
                                                    &pre_range_timeout_micro_seconds);
 
                 if (status == VL53L0X_ERROR_NONE)
-                    status = get_sequence_step_timeout(dev,
-                                                       VL53L0X_SEQUENCESTEP_MSRC,
+                    status = get_sequence_step_timeout(VL53L0X_SEQUENCESTEP_MSRC,
                                                        &msrc_timeout_micro_seconds);
 
                 if (status == VL53L0X_ERROR_NONE)
-                    status = VL53L0X_write_byte(dev,
-                                                VL53L0X_REG_PRE_RANGE_CONFIG_VCSEL_PERIOD,
+                    status = VL53L0X_write_byte(VL53L0X_REG_PRE_RANGE_CONFIG_VCSEL_PERIOD,
                                                 vcsel_period_reg);
 
 
                 if (status == VL53L0X_ERROR_NONE)
-                    status = set_sequence_step_timeout(dev,
-                                                       VL53L0X_SEQUENCESTEP_PRE_RANGE,
+                    status = set_sequence_step_timeout(VL53L0X_SEQUENCESTEP_PRE_RANGE,
                                                        pre_range_timeout_micro_seconds);
 
 
                 if (status == VL53L0X_ERROR_NONE)
-                    status = set_sequence_step_timeout(dev,
-                                                       VL53L0X_SEQUENCESTEP_MSRC,
+                    status = set_sequence_step_timeout(VL53L0X_SEQUENCESTEP_MSRC,
                                                        msrc_timeout_micro_seconds);
 
-                VL53L0X_SETDEVICESPECIFICPARAMETER(
-                    dev,
-                    PreRangeVcselPulsePeriod,
-                    vcsel_pulse_period_pclk);
+                _device->DeviceSpecificParameters.PreRangeVcselPulsePeriod = vcsel_pulse_period_pclk;
                 break;
             case VL53L0X_VCSEL_PERIOD_FINAL_RANGE:
-                status = get_sequence_step_timeout(dev,
-                                                   VL53L0X_SEQUENCESTEP_FINAL_RANGE,
+                status = get_sequence_step_timeout(VL53L0X_SEQUENCESTEP_FINAL_RANGE,
                                                    &final_range_timeout_micro_seconds);
 
                 if (status == VL53L0X_ERROR_NONE)
-                    status = VL53L0X_write_byte(dev,
-                                                VL53L0X_REG_FINAL_RANGE_CONFIG_VCSEL_PERIOD,
+                    status = VL53L0X_write_byte(VL53L0X_REG_FINAL_RANGE_CONFIG_VCSEL_PERIOD,
                                                 vcsel_period_reg);
 
 
                 if (status == VL53L0X_ERROR_NONE)
-                    status = set_sequence_step_timeout(dev,
-                                                       VL53L0X_SEQUENCESTEP_FINAL_RANGE,
+                    status = set_sequence_step_timeout(VL53L0X_SEQUENCESTEP_FINAL_RANGE,
                                                        final_range_timeout_micro_seconds);
 
-                VL53L0X_SETDEVICESPECIFICPARAMETER(
-                    dev,
-                    FinalRangeVcselPulsePeriod,
-                    vcsel_pulse_period_pclk);
+                _device->DeviceSpecificParameters.FinalRangeVcselPulsePeriod = vcsel_pulse_period_pclk;
                 break;
             default:
                 status = VL53L0X_ERROR_INVALID_PARAMS;
         }
     }
 
-    /* Finally, the timing budget must be re-applied */
+    /* Finally,the timing budget must be re-applied */
     if (status == VL53L0X_ERROR_NONE) {
-        VL53L0X_GETPARAMETERFIELD(dev,
-                                  MeasurementTimingBudgetMicroSeconds,
-                                  measurement_timing_budget_micro_seconds);
-
-        status = VL53L0X_set_measurement_timing_budget_micro_seconds(dev,
-                 measurement_timing_budget_micro_seconds);
+        measurement_timing_budget_micro_seconds = _device->CurrentParameters.MeasurementTimingBudgetMicroSeconds; 
+
+        status = VL53L0X_set_measurement_timing_budget_micro_seconds(measurement_timing_budget_micro_seconds);
     }
 
     /* Perform the phase calibration. This is needed after changing on
      * vcsel period.
-     * get_data_enable = 0, restore_config = 1 */
+     * get_data_enable = 0,restore_config = 1 */
     if (status == VL53L0X_ERROR_NONE)
-        status = VL53L0X_perform_phase_calibration(
-                     dev, &phase_cal_int, 0, 1);
+        status = VL53L0X_perform_phase_calibration(&phase_cal_int,0,1);
 
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_set_vcsel_pulse_period(VL53L0X_DEV dev,
-        VL53L0X_VcselPeriod vcsel_period_type, uint8_t vcsel_pulse_period)
+VL53L0X_Error VL53L0X::VL53L0X_set_vcsel_pulse_period(VL53L0X_VcselPeriod vcsel_period_type,uint8_t vcsel_pulse_period)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = wrapped_VL53L0X_set_vcsel_pulse_period(dev, vcsel_period_type,
+    status = wrapped_VL53L0X_set_vcsel_pulse_period(vcsel_period_type,
              vcsel_pulse_period);
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::wrapped_VL53L0X_get_vcsel_pulse_period(VL53L0X_DEV dev,
-        VL53L0X_VcselPeriod vcsel_period_type, uint8_t *p_vcsel_pulse_period_pclk)
+VL53L0X_Error VL53L0X::wrapped_VL53L0X_get_vcsel_pulse_period(VL53L0X_VcselPeriod vcsel_period_type,uint8_t *p_vcsel_pulse_period_pclk)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t vcsel_period_reg;
 
     switch (vcsel_period_type) {
         case VL53L0X_VCSEL_PERIOD_PRE_RANGE:
-            status = VL53L0X_read_byte(dev,
-                                       VL53L0X_REG_PRE_RANGE_CONFIG_VCSEL_PERIOD,
+            status = VL53L0X_read_byte(VL53L0X_REG_PRE_RANGE_CONFIG_VCSEL_PERIOD,
                                        &vcsel_period_reg);
             break;
         case VL53L0X_VCSEL_PERIOD_FINAL_RANGE:
-            status = VL53L0X_read_byte(dev,
-                                       VL53L0X_REG_FINAL_RANGE_CONFIG_VCSEL_PERIOD,
+            status = VL53L0X_read_byte(VL53L0X_REG_FINAL_RANGE_CONFIG_VCSEL_PERIOD,
                                        &vcsel_period_reg);
             break;
         default:
@@ -1089,13 +1004,12 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_vcsel_pulse_period(VL53L0X_DEV dev,
-        VL53L0X_VcselPeriod vcsel_period_type, uint8_t *p_vcsel_pulse_period_pclk)
+VL53L0X_Error VL53L0X::VL53L0X_get_vcsel_pulse_period(VL53L0X_VcselPeriod vcsel_period_type,uint8_t *p_vcsel_pulse_period_pclk)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = wrapped_VL53L0X_get_vcsel_pulse_period(dev, vcsel_period_type,
+    status = wrapped_VL53L0X_get_vcsel_pulse_period(vcsel_period_type,
              p_vcsel_pulse_period_pclk);
 
     
@@ -1116,7 +1030,7 @@
     return timeout_macro_clks;
 }
 
-uint32_t VL53L0X::VL53L0X_calc_macro_period_ps(VL53L0X_DEV dev, uint8_t vcsel_period_pclks)
+uint32_t VL53L0X::VL53L0X_calc_macro_period_ps(uint8_t vcsel_period_pclks)
 {
     uint64_t pll_period_ps;
     uint32_t macro_period_vclks;
@@ -1136,15 +1050,14 @@
 }
 
 /* To convert register value into us */
-uint32_t VL53L0X::VL53L0X_calc_timeout_us(VL53L0X_DEV dev,
-        uint16_t timeout_period_mclks,
+uint32_t VL53L0X::VL53L0X_calc_timeout_us(uint16_t timeout_period_mclks,
         uint8_t vcsel_period_pclks)
 {
     uint32_t macro_period_ps;
     uint32_t macro_period_ns;
     uint32_t actual_timeout_period_us = 0;
 
-    macro_period_ps = VL53L0X_calc_macro_period_ps(dev, vcsel_period_pclks);
+    macro_period_ps = VL53L0X_calc_macro_period_ps(vcsel_period_pclks);
     macro_period_ns = (macro_period_ps + 500) / 1000;
 
     actual_timeout_period_us =
@@ -1153,8 +1066,7 @@
     return actual_timeout_period_us;
 }
 
-VL53L0X_Error VL53L0X::get_sequence_step_timeout(VL53L0X_DEV dev,
-        VL53L0X_SequenceStepId sequence_step_id,
+VL53L0X_Error VL53L0X::get_sequence_step_timeout(VL53L0X_SequenceStepId sequence_step_id,
         uint32_t *p_time_out_micro_secs)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -1172,87 +1084,72 @@
             (sequence_step_id == VL53L0X_SEQUENCESTEP_DSS)	 ||
             (sequence_step_id == VL53L0X_SEQUENCESTEP_MSRC)) {
 
-        status = VL53L0X_get_vcsel_pulse_period(dev,
-                                                VL53L0X_VCSEL_PERIOD_PRE_RANGE,
+        status = VL53L0X_get_vcsel_pulse_period(VL53L0X_VCSEL_PERIOD_PRE_RANGE,
                                                 &current_vcsel_pulse_period_p_clk);
         if (status == VL53L0X_ERROR_NONE) {
-            status = VL53L0X_read_byte(dev,
-                                       VL53L0X_REG_MSRC_CONFIG_TIMEOUT_MACROP,
+            status = VL53L0X_read_byte(VL53L0X_REG_MSRC_CONFIG_TIMEOUT_MACROP,
                                        &encoded_time_out_byte);
         }
         msrc_time_out_m_clks = VL53L0X_decode_timeout(encoded_time_out_byte);
 
-        timeout_micro_seconds = VL53L0X_calc_timeout_us(dev,
-                                msrc_time_out_m_clks,
+        timeout_micro_seconds = VL53L0X_calc_timeout_us(msrc_time_out_m_clks,
                                 current_vcsel_pulse_period_p_clk);
     } else if (sequence_step_id == VL53L0X_SEQUENCESTEP_PRE_RANGE) {
         /* Retrieve PRE-RANGE VCSEL Period */
-        status = VL53L0X_get_vcsel_pulse_period(dev,
-                                                VL53L0X_VCSEL_PERIOD_PRE_RANGE,
+        status = VL53L0X_get_vcsel_pulse_period(VL53L0X_VCSEL_PERIOD_PRE_RANGE,
                                                 &current_vcsel_pulse_period_p_clk);
 
         /* Retrieve PRE-RANGE Timeout in Macro periods (MCLKS) */
         if (status == VL53L0X_ERROR_NONE) {
 
             /* Retrieve PRE-RANGE VCSEL Period */
-            status = VL53L0X_get_vcsel_pulse_period(dev,
-                                                    VL53L0X_VCSEL_PERIOD_PRE_RANGE,
+            status = VL53L0X_get_vcsel_pulse_period(VL53L0X_VCSEL_PERIOD_PRE_RANGE,
                                                     &current_vcsel_pulse_period_p_clk);
 
             if (status == VL53L0X_ERROR_NONE) {
-                status = VL53L0X_read_word(dev,
-                                           VL53L0X_REG_PRE_RANGE_CONFIG_TIMEOUT_MACROP_HI,
+                status = VL53L0X_read_word(VL53L0X_REG_PRE_RANGE_CONFIG_TIMEOUT_MACROP_HI,
                                            &pre_range_encoded_time_out);
             }
 
-            pre_range_time_out_m_clks = VL53L0X_decode_timeout(
-                                            pre_range_encoded_time_out);
-
-            timeout_micro_seconds = VL53L0X_calc_timeout_us(dev,
-                                    pre_range_time_out_m_clks,
+            pre_range_time_out_m_clks = VL53L0X_decode_timeout(pre_range_encoded_time_out);
+
+            timeout_micro_seconds = VL53L0X_calc_timeout_us(pre_range_time_out_m_clks,
                                     current_vcsel_pulse_period_p_clk);
         }
     } else if (sequence_step_id == VL53L0X_SEQUENCESTEP_FINAL_RANGE) {
 
-        VL53L0X_get_sequence_step_enables(dev, &scheduler_sequence_steps);
+        VL53L0X_get_sequence_step_enables(&scheduler_sequence_steps);
         pre_range_time_out_m_clks = 0;
 
         if (scheduler_sequence_steps.PreRangeOn) {
             /* Retrieve PRE-RANGE VCSEL Period */
-            status = VL53L0X_get_vcsel_pulse_period(dev,
-                                                    VL53L0X_VCSEL_PERIOD_PRE_RANGE,
+            status = VL53L0X_get_vcsel_pulse_period(VL53L0X_VCSEL_PERIOD_PRE_RANGE,
                                                     &current_vcsel_pulse_period_p_clk);
 
             /* Retrieve PRE-RANGE Timeout in Macro periods
              * (MCLKS) */
             if (status == VL53L0X_ERROR_NONE) {
-                status = VL53L0X_read_word(dev,
-                                           VL53L0X_REG_PRE_RANGE_CONFIG_TIMEOUT_MACROP_HI,
+                status = VL53L0X_read_word(VL53L0X_REG_PRE_RANGE_CONFIG_TIMEOUT_MACROP_HI,
                                            &pre_range_encoded_time_out);
-                pre_range_time_out_m_clks = VL53L0X_decode_timeout(
-                                                pre_range_encoded_time_out);
+                pre_range_time_out_m_clks = VL53L0X_decode_timeout(pre_range_encoded_time_out);
             }
         }
 
         if (status == VL53L0X_ERROR_NONE) {
             /* Retrieve FINAL-RANGE VCSEL Period */
-            status = VL53L0X_get_vcsel_pulse_period(dev,
-                                                    VL53L0X_VCSEL_PERIOD_FINAL_RANGE,
+            status = VL53L0X_get_vcsel_pulse_period(VL53L0X_VCSEL_PERIOD_FINAL_RANGE,
                                                     &current_vcsel_pulse_period_p_clk);
         }
 
         /* Retrieve FINAL-RANGE Timeout in Macro periods (MCLKS) */
         if (status == VL53L0X_ERROR_NONE) {
-            status = VL53L0X_read_word(dev,
-                                       VL53L0X_REG_FINAL_RANGE_CONFIG_TIMEOUT_MACROP_HI,
+            status = VL53L0X_read_word(VL53L0X_REG_FINAL_RANGE_CONFIG_TIMEOUT_MACROP_HI,
                                        &final_range_encoded_time_out);
-            final_range_time_out_m_clks = VL53L0X_decode_timeout(
-                                              final_range_encoded_time_out);
+            final_range_time_out_m_clks = VL53L0X_decode_timeout(final_range_encoded_time_out);
         }
 
         final_range_time_out_m_clks -= pre_range_time_out_m_clks;
-        timeout_micro_seconds = VL53L0X_calc_timeout_us(dev,
-                                final_range_time_out_m_clks,
+        timeout_micro_seconds = VL53L0X_calc_timeout_us(final_range_time_out_m_clks,
                                 current_vcsel_pulse_period_p_clk);
     }
 
@@ -1261,8 +1158,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::wrapped_VL53L0X_get_measurement_timing_budget_micro_seconds(VL53L0X_DEV dev,
-        uint32_t *p_measurement_timing_budget_micro_seconds)
+VL53L0X_Error VL53L0X::wrapped_VL53L0X_get_measurement_timing_budget_micro_seconds(uint32_t *p_measurement_timing_budget_micro_seconds)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     VL53L0X_SchedulerSequenceSteps_t scheduler_sequence_steps;
@@ -1283,7 +1179,7 @@
     *p_measurement_timing_budget_micro_seconds
         = start_overhead_micro_seconds + end_overhead_micro_seconds;
 
-    status = VL53L0X_get_sequence_step_enables(dev, &scheduler_sequence_steps);
+    status = VL53L0X_get_sequence_step_enables(&scheduler_sequence_steps);
 
     if (status != VL53L0X_ERROR_NONE) {
         
@@ -1295,8 +1191,7 @@
             scheduler_sequence_steps.MsrcOn ||
             scheduler_sequence_steps.DssOn) {
 
-        status = get_sequence_step_timeout(dev,
-                                           VL53L0X_SEQUENCESTEP_MSRC,
+        status = get_sequence_step_timeout(VL53L0X_SEQUENCESTEP_MSRC,
                                            &msrc_dcc_tcc_timeout_micro_seconds);
 
         if (status == VL53L0X_ERROR_NONE) {
@@ -1320,8 +1215,7 @@
 
     if (status == VL53L0X_ERROR_NONE) {
         if (scheduler_sequence_steps.PreRangeOn) {
-            status = get_sequence_step_timeout(dev,
-                                               VL53L0X_SEQUENCESTEP_PRE_RANGE,
+            status = get_sequence_step_timeout(VL53L0X_SEQUENCESTEP_PRE_RANGE,
                                                &pre_range_timeout_micro_seconds);
             *p_measurement_timing_budget_micro_seconds +=
                 pre_range_timeout_micro_seconds +
@@ -1331,8 +1225,7 @@
 
     if (status == VL53L0X_ERROR_NONE) {
         if (scheduler_sequence_steps.FinalRangeOn) {
-            status = get_sequence_step_timeout(dev,
-                                               VL53L0X_SEQUENCESTEP_FINAL_RANGE,
+            status = get_sequence_step_timeout(VL53L0X_SEQUENCESTEP_FINAL_RANGE,
                                                &final_range_timeout_micro_seconds);
             *p_measurement_timing_budget_micro_seconds +=
                 (final_range_timeout_micro_seconds +
@@ -1341,41 +1234,36 @@
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        VL53L0X_SETPARAMETERFIELD(dev,
-                                  MeasurementTimingBudgetMicroSeconds,
-                                  *p_measurement_timing_budget_micro_seconds);
+        _device->CurrentParameters.MeasurementTimingBudgetMicroSeconds =
+                                  *p_measurement_timing_budget_micro_seconds;
     }
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_measurement_timing_budget_micro_seconds(VL53L0X_DEV dev,
-        uint32_t *p_measurement_timing_budget_micro_seconds)
+VL53L0X_Error VL53L0X::VL53L0X_get_measurement_timing_budget_micro_seconds(uint32_t *p_measurement_timing_budget_micro_seconds)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = wrapped_VL53L0X_get_measurement_timing_budget_micro_seconds(dev,
-             p_measurement_timing_budget_micro_seconds);
+    status = wrapped_VL53L0X_get_measurement_timing_budget_micro_seconds(p_measurement_timing_budget_micro_seconds);
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_device_parameters(VL53L0X_DEV dev,
-        VL53L0X_DeviceParameters_t *p_device_parameters)
+VL53L0X_Error VL53L0X::VL53L0X_get_device_parameters(VL53L0X_DeviceParameters_t *p_device_parameters)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     int i;
 
     
 
-    status = VL53L0X_get_device_mode(dev, &(p_device_parameters->DeviceMode));
+    status = VL53L0X_get_device_mode(&(p_device_parameters->DeviceMode));
 
     if (status == VL53L0X_ERROR_NONE)
-        status = VL53L0X_get_inter_measurement_period_milli_seconds(dev,
-                 &(p_device_parameters->InterMeasurementPeriodMilliSeconds));
+        status = VL53L0X_get_inter_measurement_period_milli_seconds(&(p_device_parameters->InterMeasurementPeriodMilliSeconds));
 
 
     if (status == VL53L0X_ERROR_NONE) {
@@ -1383,29 +1271,27 @@
     }
 
     if (status == VL53L0X_ERROR_NONE)
-        status = VL53L0X_get_x_talk_compensation_rate_mega_cps(dev,
-                 &(p_device_parameters->XTalkCompensationRateMegaCps));
+        status = VL53L0X_get_x_talk_compensation_rate_mega_cps(&(p_device_parameters->XTalkCompensationRateMegaCps));
 
 
     if (status == VL53L0X_ERROR_NONE)
-        status = VL53L0X_get_offset_calibration_data_micro_meter(dev,
-                 &(p_device_parameters->RangeOffsetMicroMeters));
+        status = VL53L0X_get_offset_calibration_data_micro_meter(&(p_device_parameters->RangeOffsetMicroMeters));
 
 
     if (status == VL53L0X_ERROR_NONE) {
         for (i = 0; i < VL53L0X_CHECKENABLE_NUMBER_OF_CHECKS; i++) {
-            /* get first the values, then the enables.
+            /* get first the values,then the enables.
              * VL53L0X_GetLimitCheckValue will modify the enable
              * flags
              */
             if (status == VL53L0X_ERROR_NONE) {
-                status |= VL53L0X_get_limit_check_value(dev, i,
+                status |= VL53L0X_get_limit_check_value(i,
                                                         &(p_device_parameters->LimitChecksValue[i]));
             } else {
                 break;
             }
             if (status == VL53L0X_ERROR_NONE) {
-                status |= VL53L0X_get_limit_check_enable(dev, i,
+                status |= VL53L0X_get_limit_check_enable(i,
                           &(p_device_parameters->LimitChecksEnable[i]));
             } else {
                 break;
@@ -1414,21 +1300,19 @@
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_get_wrap_around_check_enable(dev,
-                 &(p_device_parameters->WrapAroundCheckEnable));
+        status = VL53L0X_get_wrap_around_check_enable(&(p_device_parameters->WrapAroundCheckEnable));
     }
 
     /* Need to be done at the end as it uses VCSELPulsePeriod */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_get_measurement_timing_budget_micro_seconds(dev,
-                 &(p_device_parameters->MeasurementTimingBudgetMicroSeconds));
+        status = VL53L0X_get_measurement_timing_budget_micro_seconds(&(p_device_parameters->MeasurementTimingBudgetMicroSeconds));
     }
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_set_limit_check_value(VL53L0X_DEV dev, uint16_t limit_check_id,
+VL53L0X_Error VL53L0X::VL53L0X_set_limit_check_value(uint16_t limit_check_id,
         FixPoint1616_t limit_check_value)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -1436,57 +1320,45 @@
 
     
 
-    VL53L0X_GETARRAYPARAMETERFIELD(dev, LimitChecksEnable, limit_check_id,
-                                   temp8);
+    temp8 = _device->CurrentParameters.LimitChecksEnable[limit_check_id];
 
     if (temp8 == 0) { /* disabled write only internal value */
-        VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksValue,
-                                       limit_check_id, limit_check_value);
+         _device->CurrentParameters.LimitChecksValue[limit_check_id] = limit_check_value; 
     } else {
 
         switch (limit_check_id) {
 
             case VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE:
                 /* internal computation: */
-                VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksValue,
-                                               VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE,
-                                               limit_check_value);
+                 _device->CurrentParameters.LimitChecksValue[VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE] = limit_check_value; 
                 break;
 
             case VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE:
 
-                status = VL53L0X_write_word(dev,
-                                            VL53L0X_REG_FINAL_RANGE_CONFIG_MIN_COUNT_RATE_RTN_LIMIT,
-                                            VL53L0X_FIXPOINT1616TOFIXPOINT97(
-                                                limit_check_value));
+                status = VL53L0X_write_word(VL53L0X_REG_FINAL_RANGE_CONFIG_MIN_COUNT_RATE_RTN_LIMIT,
+                                            VL53L0X_FIXPOINT1616TOFIXPOINT97(limit_check_value));
 
                 break;
 
             case VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP:
 
                 /* internal computation: */
-                VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksValue,
-                                               VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP,
-                                               limit_check_value);
+                 _device->CurrentParameters.LimitChecksValue[VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP] = limit_check_value; 
 
                 break;
 
             case VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD:
 
                 /* internal computation: */
-                VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksValue,
-                                               VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD,
-                                               limit_check_value);
+                 _device->CurrentParameters.LimitChecksValue[VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD] = limit_check_value; 
 
                 break;
 
             case VL53L0X_CHECKENABLE_SIGNAL_RATE_MSRC:
             case VL53L0X_CHECKENABLE_SIGNAL_RATE_PRE_RANGE:
 
-                status = VL53L0X_write_word(dev,
-                                            VL53L0X_REG_PRE_RANGE_MIN_COUNT_RATE_RTN_LIMIT,
-                                            VL53L0X_FIXPOINT1616TOFIXPOINT97(
-                                                limit_check_value));
+                status = VL53L0X_write_word(VL53L0X_REG_PRE_RANGE_MIN_COUNT_RATE_RTN_LIMIT,
+                                            VL53L0X_FIXPOINT1616TOFIXPOINT97(limit_check_value));
 
                 break;
 
@@ -1496,8 +1368,7 @@
         }
 
         if (status == VL53L0X_ERROR_NONE) {
-            VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksValue,
-                                           limit_check_id, limit_check_value);
+             _device->CurrentParameters.LimitChecksValue[limit_check_id] = limit_check_value; 
         }
     }
 
@@ -1505,7 +1376,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_data_init(VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::VL53L0X_data_init()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     VL53L0X_DeviceParameters_t CurrentParameters;
@@ -1517,71 +1388,70 @@
     /* by default the I2C is running at 1V8 if you want to change it you
      * need to include this define at compilation level. */
 #ifdef USE_I2C_2V8
-    Status = VL53L0X_UpdateByte(Dev,
-                                VL53L0X_REG_VHV_CONFIG_PAD_SCL_SDA__EXTSUP_HV,
+    Status = VL53L0X_UpdateByte(VL53L0X_REG_VHV_CONFIG_PAD_SCL_SDA__EXTSUP_HV,
                                 0xFE,
                                 0x01);
 #endif
 
     /* Set I2C standard mode */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev, 0x88, 0x00);
-    }
-
-    VL53L0X_SETDEVICESPECIFICPARAMETER(dev, ReadDataFromDeviceDone, 0);
+        status = VL53L0X_write_byte(0x88,0x00);
+    }
+
+    _device->DeviceSpecificParameters.ReadDataFromDeviceDone = 0;
+    _device->DeviceSpecificParameters.ReadDataFromDeviceDone = 0;
 
 #ifdef USE_IQC_STATION
     if (Status == VL53L0X_ERROR_NONE) {
-        Status = VL53L0X_apply_offset_adjustment(Dev);
+        Status = VL53L0X_apply_offset_adjustment();
     }
 #endif
 
     /* Default value is 1000 for Linearity Corrective Gain */
-    PALDevDataSet(dev, LinearityCorrectiveGain, 1000);
+    _device->LinearityCorrectiveGain = 1000; 
 
     /* Dmax default Parameter */
-    PALDevDataSet(dev, DmaxCalRangeMilliMeter, 400);
-    PALDevDataSet(dev, DmaxCalSignalRateRtnMegaCps,
-                  (FixPoint1616_t)((0x00016B85))); /* 1.42 No Cover Glass*/
+    _device->DmaxCalRangeMilliMeter = 400; 
+    _device->DmaxCalSignalRateRtnMegaCps = (FixPoint1616_t)((0x00016B85)); /* 1.42 No Cover Glass*/
 
     /* Set Default static parameters
      *set first temporary values 9.44MHz * 65536 = 618660 */
-    VL53L0X_SETDEVICESPECIFICPARAMETER(dev, OscFrequencyMHz, 618660);
+    _device->DeviceSpecificParameters.OscFrequencyMHz = 618660;
 
     /* Set Default XTalkCompensationRateMegaCps to 0  */
-    VL53L0X_SETPARAMETERFIELD(dev, XTalkCompensationRateMegaCps, 0);
+    _device->CurrentParameters.XTalkCompensationRateMegaCps = 0; 
 
     /* Get default parameters */
-    status = VL53L0X_get_device_parameters(dev, &CurrentParameters);
+    status = VL53L0X_get_device_parameters(&CurrentParameters);
     if (status == VL53L0X_ERROR_NONE) {
         /* initialize PAL values */
         CurrentParameters.DeviceMode = VL53L0X_DEVICEMODE_SINGLE_RANGING;
         CurrentParameters.HistogramMode = VL53L0X_HISTOGRAMMODE_DISABLED;
-        PALDevDataSet(dev, CurrentParameters, CurrentParameters);
+        _device->CurrentParameters = CurrentParameters; 
     }
 
     /* Sigma estimator variable */
-    PALDevDataSet(dev, SigmaEstRefArray, 100);
-    PALDevDataSet(dev, SigmaEstEffPulseWidth, 900);
-    PALDevDataSet(dev, SigmaEstEffAmbWidth, 500);
-    PALDevDataSet(dev, targetRefRate, 0x0A00); /* 20 MCPS in 9:7 format */
+    _device->SigmaEstRefArray = 100; 
+    _device->SigmaEstEffPulseWidth = 900; 
+    _device->SigmaEstEffAmbWidth = 500; 
+    _device->targetRefRate = 0x0A00;  /* 20 MCPS in 9:7 format */
 
     /* Use internal default settings */
-    PALDevDataSet(dev, UseInternalTuningSettings, 1);
-
-    status |= VL53L0X_write_byte(dev, 0x80, 0x01);
-    status |= VL53L0X_write_byte(dev, 0xFF, 0x01);
-    status |= VL53L0X_write_byte(dev, 0x00, 0x00);
-    status |= VL53L0X_read_byte(dev, 0x91, &StopVariable);
-    PALDevDataSet(dev, StopVariable, StopVariable);
-    status |= VL53L0X_write_byte(dev, 0x00, 0x01);
-    status |= VL53L0X_write_byte(dev, 0xFF, 0x00);
-    status |= VL53L0X_write_byte(dev, 0x80, 0x00);
+    _device->UseInternalTuningSettings = 1; 
+
+    status |= VL53L0X_write_byte(0x80,0x01);
+    status |= VL53L0X_write_byte(0xFF,0x01);
+    status |= VL53L0X_write_byte(0x00,0x00);
+    status |= VL53L0X_read_byte(0x91,&StopVariable);
+    _device->StopVariable = StopVariable; 
+    status |= VL53L0X_write_byte(0x00,0x01);
+    status |= VL53L0X_write_byte(0xFF,0x00);
+    status |= VL53L0X_write_byte(0x80,0x00);
 
     /* Enable all check */
     for (i = 0; i < VL53L0X_CHECKENABLE_NUMBER_OF_CHECKS; i++) {
         if (status == VL53L0X_ERROR_NONE) {
-            status |= VL53L0X_set_limit_check_enable(dev, i, 1);
+            status |= VL53L0X_set_limit_check_enable(i,1);
         } else {
             break;
         }
@@ -1590,59 +1460,51 @@
 
     /* Disable the following checks */
     if (status == VL53L0X_ERROR_NONE)
-        status = VL53L0X_set_limit_check_enable(dev,
-                                                VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP, 0);
+        status = VL53L0X_set_limit_check_enable(VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP,0);
 
     if (status == VL53L0X_ERROR_NONE)
-        status = VL53L0X_set_limit_check_enable(dev,
-                                                VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD, 0);
+        status = VL53L0X_set_limit_check_enable(VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD,0);
 
     if (status == VL53L0X_ERROR_NONE)
-        status = VL53L0X_set_limit_check_enable(dev,
-                                                VL53L0X_CHECKENABLE_SIGNAL_RATE_MSRC, 0);
+        status = VL53L0X_set_limit_check_enable(VL53L0X_CHECKENABLE_SIGNAL_RATE_MSRC,0);
 
     if (status == VL53L0X_ERROR_NONE)
-        status = VL53L0X_set_limit_check_enable(dev,
-                                                VL53L0X_CHECKENABLE_SIGNAL_RATE_PRE_RANGE, 0);
+        status = VL53L0X_set_limit_check_enable(VL53L0X_CHECKENABLE_SIGNAL_RATE_PRE_RANGE,0);
 
     /* Limit default values */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_set_limit_check_value(dev,
-                                               VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE,
+        status = VL53L0X_set_limit_check_value(VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE,
                                                (FixPoint1616_t)(18 * 65536));
     }
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_set_limit_check_value(dev,
-                                               VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE,
+        status = VL53L0X_set_limit_check_value(VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE,
                                                (FixPoint1616_t)(25 * 65536 / 100));
         /* 0.25 * 65536 */
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_set_limit_check_value(dev,
-                                               VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP,
+        status = VL53L0X_set_limit_check_value(VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP,
                                                (FixPoint1616_t)(35 * 65536));
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_set_limit_check_value(dev,
-                                               VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD,
+        status = VL53L0X_set_limit_check_value(VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD,
                                                (FixPoint1616_t)(0 * 65536));
     }
 
     if (status == VL53L0X_ERROR_NONE) {
 
-        PALDevDataSet(dev, SequenceConfig, 0xFF);
-        status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
+        _device->SequenceConfig = 0xFF; 
+        status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
                                     0xFF);
 
         /* Set PAL state to tell that we are waiting for call to
          * VL53L0X_StaticInit */
-        PALDevDataSet(dev, PalState, VL53L0X_STATE_WAIT_STATICINIT);
+        _device->PalState = VL53L0X_STATE_WAIT_STATICINIT; 
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        VL53L0X_SETDEVICESPECIFICPARAMETER(dev, RefSpadsInitialised, 0);
+        _device->DeviceSpecificParameters.RefSpadsInitialised = 0;
     }
 
 
@@ -1650,8 +1512,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_check_part_used(VL53L0X_DEV dev,
-        uint8_t *revision,
+VL53L0X_Error VL53L0X::VL53L0X_check_part_used(uint8_t *revision,
         VL53L0X_DeviceInfo_t *p_VL53L0X_device_info)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -1660,19 +1521,18 @@
 
     
 
-    status = VL53L0X_get_info_from_device(dev, 2);
+    status = VL53L0X_get_info_from_device(2);
 
     if (status == VL53L0X_ERROR_NONE) {
-        module_id_int = VL53L0X_GETDEVICESPECIFICPARAMETER(dev, ModuleId);
+        module_id_int = _device->DeviceSpecificParameters.ModuleId; 
 
         if (module_id_int == 0) {
             *revision = 0;
-            strcpy(p_VL53L0X_device_info->ProductId, "");
+            strcpy(p_VL53L0X_device_info->ProductId,"");
         } else {
-            *revision = VL53L0X_GETDEVICESPECIFICPARAMETER(dev, Revision);
-            product_id_tmp = VL53L0X_GETDEVICESPECIFICPARAMETER(dev,
-                             ProductId);
-            strcpy(p_VL53L0X_device_info->ProductId, product_id_tmp);
+            *revision = _device->DeviceSpecificParameters.Revision; 
+            product_id_tmp = _device->DeviceSpecificParameters.ProductId; 
+            strcpy(p_VL53L0X_device_info->ProductId,product_id_tmp);
         }
     }
 
@@ -1680,14 +1540,13 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::wrapped_VL53L0X_get_device_info(VL53L0X_DEV dev,
-        VL53L0X_DeviceInfo_t *p_VL53L0X_device_info)
+VL53L0X_Error VL53L0X::VL53L0X_get_device_info(VL53L0X_DeviceInfo_t *p_VL53L0X_device_info)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t revision_id;
     uint8_t revision;
 
-    status = VL53L0X_check_part_used(dev, &revision, p_VL53L0X_device_info);
+    status = VL53L0X_check_part_used(&revision,p_VL53L0X_device_info);
 
     if (status == VL53L0X_ERROR_NONE) {
         if (revision == 0) {
@@ -1704,19 +1563,16 @@
                                VL53L0X_STRING_DEVICE_INFO_NAME_ES1);
         }
 
-        strcpy(p_VL53L0X_device_info->Type,
-                           VL53L0X_STRING_DEVICE_INFO_TYPE);
-
+        strcpy(p_VL53L0X_device_info->Type,VL53L0X_STRING_DEVICE_INFO_TYPE);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_read_byte(dev, VL53L0X_REG_IDENTIFICATION_MODEL_ID,
+        status = VL53L0X_read_byte(VL53L0X_REG_IDENTIFICATION_MODEL_ID,
                                    &p_VL53L0X_device_info->ProductType);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_read_byte(dev,
-                                   VL53L0X_REG_IDENTIFICATION_REVISION_ID,
+        status = VL53L0X_read_byte(VL53L0X_REG_IDENTIFICATION_REVISION_ID,
                                    &revision_id);
         p_VL53L0X_device_info->ProductRevisionMajor = 1;
         p_VL53L0X_device_info->ProductRevisionMinor =
@@ -1726,24 +1582,13 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_device_info(VL53L0X_DEV dev,
-        VL53L0X_DeviceInfo_t *p_VL53L0X_device_info)
-{
-    VL53L0X_Error status = VL53L0X_ERROR_NONE;
-
-    status = wrapped_VL53L0X_get_device_info(dev, p_VL53L0X_device_info);
-
-    return status;
-}
-
-VL53L0X_Error VL53L0X::VL53L0X_get_interrupt_mask_status(VL53L0X_DEV dev,
-        uint32_t *p_interrupt_mask_status)
+VL53L0X_Error VL53L0X::VL53L0X_get_interrupt_mask_status(uint32_t *p_interrupt_mask_status)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t byte;
     
 
-    status = VL53L0X_read_byte(dev, VL53L0X_REG_RESULT_INTERRUPT_STATUS, &byte);
+    status = VL53L0X_read_byte(VL53L0X_REG_RESULT_INTERRUPT_STATUS,&byte);
     *p_interrupt_mask_status = byte & 0x07;
 
     if (byte & 0x18) {
@@ -1754,8 +1599,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_measurement_data_ready(VL53L0X_DEV dev,
-        uint8_t *p_measurement_data_ready)
+VL53L0X_Error VL53L0X::VL53L0X_get_measurement_data_ready(uint8_t *p_measurement_data_ready)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t sys_range_status_register;
@@ -1763,12 +1607,11 @@
     uint32_t interrupt_mask;
     
 
-    interrupt_config = VL53L0X_GETDEVICESPECIFICPARAMETER(dev,
-                       Pin0GpioFunctionality);
+    interrupt_config = _device->DeviceSpecificParameters.Pin0GpioFunctionality; 
 
     if (interrupt_config ==
             VL53L0X_REG_SYSTEM_INTERRUPT_GPIO_NEW_SAMPLE_READY) {
-        status = VL53L0X_get_interrupt_mask_status(dev, &interrupt_mask);
+        status = VL53L0X_get_interrupt_mask_status(&interrupt_mask);
         if (interrupt_mask ==
                 VL53L0X_REG_SYSTEM_INTERRUPT_GPIO_NEW_SAMPLE_READY) {
             *p_measurement_data_ready = 1;
@@ -1776,7 +1619,7 @@
             *p_measurement_data_ready = 0;
         }
     } else {
-        status = VL53L0X_read_byte(dev, VL53L0X_REG_RESULT_RANGE_STATUS,
+        status = VL53L0X_read_byte(VL53L0X_REG_RESULT_RANGE_STATUS,
                                    &sys_range_status_register);
         if (status == VL53L0X_ERROR_NONE) {
             if (sys_range_status_register & 0x01) {
@@ -1787,11 +1630,10 @@
         }
     }
 
-    
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_polling_delay( VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::VL53L0X_polling_delay()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
 
@@ -1799,7 +1641,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_measurement_poll_for_completion(VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::VL53L0X_measurement_poll_for_completion()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t new_data_ready = 0;
@@ -1807,13 +1649,13 @@
 
     loop_nb = 0;
     
-    status = VL53L0X_get_measurement_data_ready(dev, &new_data_ready);
-
-    while ( (status==0) && (new_data_ready != 1) &&
+    status = VL53L0X_get_measurement_data_ready(&new_data_ready);
+
+    while ((status==0) && (new_data_ready != 1) &&
      		(loop_nb < VL53L0X_DEFAULT_MAX_LOOP) )
       {
-        VL53L0X_polling_delay(dev);
-        status = VL53L0X_get_measurement_data_ready(dev, &new_data_ready);
+        VL53L0X_polling_delay();
+        status = VL53L0X_get_measurement_data_ready(&new_data_ready);
 		loop_nb++;
       } // while ;
 
@@ -1823,22 +1665,19 @@
 }
 
 /* Group PAL Interrupt Functions */
-VL53L0X_Error VL53L0X::VL53L0X_clear_interrupt_mask(VL53L0X_DEV dev, uint32_t interrupt_mask)
+VL53L0X_Error VL53L0X::VL53L0X_clear_interrupt_mask(uint32_t interrupt_mask)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t loop_count;
     uint8_t byte;
     
 
-    /* clear bit 0 range interrupt, bit 1 error interrupt */
+    /* clear bit 0 range interrupt,bit 1 error interrupt */
     loop_count = 0;
     do {
-        status = VL53L0X_write_byte(dev,
-                                    VL53L0X_REG_SYSTEM_INTERRUPT_CLEAR, 0x01);
-        status |= VL53L0X_write_byte(dev,
-                                     VL53L0X_REG_SYSTEM_INTERRUPT_CLEAR, 0x00);
-        status |= VL53L0X_read_byte(dev,
-                                    VL53L0X_REG_RESULT_INTERRUPT_STATUS, &byte);
+        status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_INTERRUPT_CLEAR,0x01);
+        status |= VL53L0X_write_byte(VL53L0X_REG_SYSTEM_INTERRUPT_CLEAR,0x00);
+        status |= VL53L0X_read_byte(VL53L0X_REG_RESULT_INTERRUPT_STATUS,&byte);
         loop_count++;
     } while (((byte & 0x07) != 0x00)
              && (loop_count < 3)
@@ -1853,72 +1692,70 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_perform_single_ref_calibration(VL53L0X_DEV dev,
-        uint8_t vhv_init_byte)
+VL53L0X_Error VL53L0X::VL53L0X_perform_single_ref_calibration(uint8_t vhv_init_byte)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSRANGE_START,
+        status = VL53L0X_write_byte(VL53L0X_REG_SYSRANGE_START,
                                     VL53L0X_REG_SYSRANGE_MODE_START_STOP |
                                     vhv_init_byte);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_measurement_poll_for_completion(dev);
+        status = VL53L0X_measurement_poll_for_completion();
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_clear_interrupt_mask(dev, 0);
+        status = VL53L0X_clear_interrupt_mask(0);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSRANGE_START, 0x00);
+        status = VL53L0X_write_byte(VL53L0X_REG_SYSRANGE_START,0x00);
     }
 
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_ref_calibration_io(VL53L0X_DEV dev, uint8_t read_not_write,
-        uint8_t vhv_settings, uint8_t phase_cal,
-        uint8_t *p_vhv_settings, uint8_t *p_phase_cal,
-        const uint8_t vhv_enable, const uint8_t phase_enable)
+VL53L0X_Error VL53L0X::VL53L0X_ref_calibration_io(uint8_t read_not_write,
+        uint8_t vhv_settings,uint8_t phase_cal,
+        uint8_t *p_vhv_settings,uint8_t *p_phase_cal,
+        const uint8_t vhv_enable,const uint8_t phase_enable)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t phase_calint = 0;
 
     /* Read VHV from device */
-    status |= VL53L0X_write_byte(dev, 0xFF, 0x01);
-    status |= VL53L0X_write_byte(dev, 0x00, 0x00);
-    status |= VL53L0X_write_byte(dev, 0xFF, 0x00);
+    status |= VL53L0X_write_byte(0xFF,0x01);
+    status |= VL53L0X_write_byte(0x00,0x00);
+    status |= VL53L0X_write_byte(0xFF,0x00);
 
     if (read_not_write) {
         if (vhv_enable) {
-            status |= VL53L0X_read_byte(dev, 0xCB, p_vhv_settings);
+            status |= VL53L0X_read_byte(0xCB,p_vhv_settings);
         }
         if (phase_enable) {
-            status |= VL53L0X_read_byte(dev, 0xEE, &phase_calint);
+            status |= VL53L0X_read_byte(0xEE,&phase_calint);
         }
     } else {
         if (vhv_enable) {
-            status |= VL53L0X_write_byte(dev, 0xCB, vhv_settings);
+            status |= VL53L0X_write_byte(0xCB,vhv_settings);
         }
         if (phase_enable) {
-            status |= VL53L0X_update_byte(dev, 0xEE, 0x80, phase_cal);
+            status |= VL53L0X_update_byte(0xEE,0x80,phase_cal);
         }
     }
 
-    status |= VL53L0X_write_byte(dev, 0xFF, 0x01);
-    status |= VL53L0X_write_byte(dev, 0x00, 0x01);
-    status |= VL53L0X_write_byte(dev, 0xFF, 0x00);
+    status |= VL53L0X_write_byte(0xFF,0x01);
+    status |= VL53L0X_write_byte(0x00,0x01);
+    status |= VL53L0X_write_byte(0xFF,0x00);
 
     *p_phase_cal = (uint8_t)(phase_calint & 0xEF);
 
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_perform_vhv_calibration(VL53L0X_DEV dev,
-        uint8_t *p_vhv_settings, const uint8_t get_data_enable,
+VL53L0X_Error VL53L0X::VL53L0X_perform_vhv_calibration(uint8_t *p_vhv_settings,const uint8_t get_data_enable,
         const uint8_t restore_config)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -1930,24 +1767,21 @@
     /* store the value of the sequence config,
      * this will be reset before the end of the function
      */
-
-    if (restore_config) {
-        sequence_config = PALDevDataGet(dev, SequenceConfig);
-    }
+    if (restore_config) {sequence_config = _device->SequenceConfig;}
 
     /* Run VHV */
-    status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG, 0x01);
+    status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,0x01);
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_perform_single_ref_calibration(dev, 0x40);
+        status = VL53L0X_perform_single_ref_calibration(0x40);
     }
 
     /* Read VHV from device */
     if ((status == VL53L0X_ERROR_NONE) && (get_data_enable == 1)) {
-        status = VL53L0X_ref_calibration_io(dev, 1,
-                                            vhv_settings, phase_cal, /* Not used here */
-                                            p_vhv_settings, &phase_cal_int,
-                                            1, 0);
+        status = VL53L0X_ref_calibration_io(1,
+                                            vhv_settings,phase_cal,/* Not used here */
+                                            p_vhv_settings,&phase_cal_int,
+                                            1,0);
     } else {
         *p_vhv_settings = 0;
     }
@@ -1955,10 +1789,10 @@
 
     if ((status == VL53L0X_ERROR_NONE) && restore_config) {
         /* restore the previous Sequence Config */
-        status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
+        status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
                                     sequence_config);
         if (status == VL53L0X_ERROR_NONE) {
-            PALDevDataSet(dev, SequenceConfig, sequence_config);
+            _device->SequenceConfig = sequence_config; 
         }
 
     }
@@ -1966,8 +1800,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_perform_phase_calibration(VL53L0X_DEV dev,
-        uint8_t *p_phase_cal, const uint8_t get_data_enable,
+VL53L0X_Error VL53L0X::VL53L0X_perform_phase_calibration(uint8_t *p_phase_cal,const uint8_t get_data_enable,
         const uint8_t restore_config)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -1981,22 +1814,22 @@
      */
 
     if (restore_config) {
-        sequence_config = PALDevDataGet(dev, SequenceConfig);
+        sequence_config = _device-> SequenceConfig;
     }
 
     /* Run PhaseCal */
-    status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG, 0x02);
+    status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,0x02);
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_perform_single_ref_calibration(dev, 0x0);
+        status = VL53L0X_perform_single_ref_calibration(0x0);
     }
 
     /* Read PhaseCal from device */
     if ((status == VL53L0X_ERROR_NONE) && (get_data_enable == 1)) {
-        status = VL53L0X_ref_calibration_io(dev, 1,
-                                            vhv_settings, phase_cal, /* Not used here */
-                                            &vhv_settingsint, p_phase_cal,
-                                            0, 1);
+        status = VL53L0X_ref_calibration_io(1,
+                                            vhv_settings,phase_cal,/* Not used here */
+                                            &vhv_settingsint,p_phase_cal,
+                                            0,1);
     } else {
         *p_phase_cal = 0;
     }
@@ -2004,10 +1837,10 @@
 
     if ((status == VL53L0X_ERROR_NONE) && restore_config) {
         /* restore the previous Sequence Config */
-        status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
+        status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
                                     sequence_config);
         if (status == VL53L0X_ERROR_NONE) {
-            PALDevDataSet(dev, SequenceConfig, sequence_config);
+            _device->SequenceConfig = sequence_config; 
         }
 
     }
@@ -2015,8 +1848,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_perform_ref_calibration(VL53L0X_DEV dev,
-        uint8_t *p_vhv_settings, uint8_t *p_phase_cal, uint8_t get_data_enable)
+VL53L0X_Error VL53L0X::VL53L0X_perform_ref_calibration(uint8_t *p_vhv_settings,uint8_t *p_phase_cal,uint8_t get_data_enable)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t sequence_config = 0;
@@ -2025,25 +1857,23 @@
      * this will be reset before the end of the function
      */
 
-    sequence_config = PALDevDataGet(dev, SequenceConfig);
+    sequence_config = _device-> SequenceConfig;
 
     /* In the following function we don't save the config to optimize
      * writes on device. Config is saved and restored only once. */
-    status = VL53L0X_perform_vhv_calibration(
-                 dev, p_vhv_settings, get_data_enable, 0);
+    status = VL53L0X_perform_vhv_calibration(p_vhv_settings,get_data_enable,0);
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_perform_phase_calibration(
-                     dev, p_phase_cal, get_data_enable, 0);
+        status = VL53L0X_perform_phase_calibration(p_phase_cal,get_data_enable,0);
     }
 
 
     if (status == VL53L0X_ERROR_NONE) {
         /* restore the previous Sequence Config */
-        status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
+        status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
                                     sequence_config);
         if (status == VL53L0X_ERROR_NONE) {
-            PALDevDataSet(dev, SequenceConfig, sequence_config);
+            _device->SequenceConfig = sequence_config; 
         }
 
     }
@@ -2051,8 +1881,8 @@
     return status;
 }
 
-void VL53L0X::get_next_good_spad(uint8_t good_spad_array[], uint32_t size,
-                                 uint32_t curr, int32_t *p_next)
+void VL53L0X::get_next_good_spad(uint8_t good_spad_array[],uint32_t size,
+                                 uint32_t curr,int32_t *p_next)
 {
     uint32_t start_index;
     uint32_t fine_offset;
@@ -2063,7 +1893,7 @@
     uint8_t success = 0;
 
     /*
-     * Starting with the current good spad, loop through the array to find
+     * Starting with the current good spad,loop through the array to find
      * the next. i.e. the next bit set in the sequence.
      *
      * The coarse index is the byte index of the array and the fine index is
@@ -2115,7 +1945,7 @@
     return is_aperture;
 }
 
-VL53L0X_Error VL53L0X::enable_spad_bit(uint8_t spad_array[], uint32_t size,
+VL53L0X_Error VL53L0X::enable_spad_bit(uint8_t spad_array[],uint32_t size,
                                        uint32_t spad_index)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -2134,31 +1964,28 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::set_ref_spad_map(VL53L0X_DEV dev, uint8_t *p_ref_spad_array)
+VL53L0X_Error VL53L0X::set_ref_spad_map(uint8_t *p_ref_spad_array)
 {
-    VL53L0X_Error status = VL53L0X_write_multi(dev,
-                           VL53L0X_REG_GLOBAL_CONFIG_SPAD_ENABLES_REF_0,
-                           p_ref_spad_array, 6);
+    VL53L0X_Error status = VL53L0X_write_multi(VL53L0X_REG_GLOBAL_CONFIG_SPAD_ENABLES_REF_0,
+                           p_ref_spad_array,6);
 
     return status;
 }
 
-VL53L0X_Error VL53L0X::get_ref_spad_map(VL53L0X_DEV dev, uint8_t *p_ref_spad_array)
+VL53L0X_Error VL53L0X::get_ref_spad_map(uint8_t *p_ref_spad_array)
 {
-    VL53L0X_Error status = VL53L0X_read_multi(dev,
-                           VL53L0X_REG_GLOBAL_CONFIG_SPAD_ENABLES_REF_0,
+    VL53L0X_Error status = VL53L0X_read_multi(VL53L0X_REG_GLOBAL_CONFIG_SPAD_ENABLES_REF_0,
                            p_ref_spad_array,
                            6);
 //	VL53L0X_Error status = VL53L0X_ERROR_NONE;
 //	uint8_t count=0;
 
 //	for (count = 0; count < 6; count++)
-//        status = VL53L0X_RdByte(Dev, (VL53L0X_REG_GLOBAL_CONFIG_SPAD_ENABLES_REF_0 + count), &refSpadArray[count]);
+//        status = VL53L0X_RdByte((VL53L0X_REG_GLOBAL_CONFIG_SPAD_ENABLES_REF_0 + count),&refSpadArray[count]);
     return status;
 }
 
-VL53L0X_Error VL53L0X::enable_ref_spads(VL53L0X_DEV dev,
-                                        uint8_t aperture_spads,
+VL53L0X_Error VL53L0X::enable_ref_spads(uint8_t aperture_spads,
                                         uint8_t good_spad_array[],
                                         uint8_t spad_array[],
                                         uint32_t size,
@@ -2186,7 +2013,7 @@
 
     current_spad = offset;
     for (index = 0; index < spad_count; index++) {
-        get_next_good_spad(good_spad_array, size, current_spad,
+        get_next_good_spad(good_spad_array,size,current_spad,
                            &next_good_spad);
 
         if (next_good_spad == -1) {
@@ -2203,18 +2030,18 @@
             break;
         }
         current_spad = (uint32_t)next_good_spad;
-        enable_spad_bit(spad_array, size, current_spad);
+        enable_spad_bit(spad_array,size,current_spad);
         current_spad++;
     }
     *p_last_spad = current_spad;
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = set_ref_spad_map(dev, spad_array);
+        status = set_ref_spad_map(spad_array);
     }
 
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = get_ref_spad_map(dev, check_spad_array);
+        status = get_ref_spad_map(check_spad_array);
 
         i = 0;
 
@@ -2230,7 +2057,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_set_device_mode(VL53L0X_DEV dev, VL53L0X_DeviceModes device_mode)
+VL53L0X_Error VL53L0X::VL53L0X_set_device_mode(VL53L0X_DeviceModes device_mode)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
 
@@ -2241,7 +2068,7 @@
         case VL53L0X_DEVICEMODE_GPIO_DRIVE:
         case VL53L0X_DEVICEMODE_GPIO_OSC:
             /* Supported modes */
-            VL53L0X_SETPARAMETERFIELD(dev, DeviceMode, device_mode);
+            _device->CurrentParameters.DeviceMode = device_mode; 
             break;
         default:
             /* Unsupported mode */
@@ -2252,8 +2079,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_set_interrupt_thresholds(VL53L0X_DEV dev,
-        VL53L0X_DeviceModes device_mode, FixPoint1616_t threshold_low,
+VL53L0X_Error VL53L0X::VL53L0X_set_interrupt_thresholds(VL53L0X_DeviceModes device_mode,FixPoint1616_t threshold_low,
         FixPoint1616_t threshold_high)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -2263,12 +2089,12 @@
     /* no dependency on DeviceMode for FlightSense */
     /* Need to divide by 2 because the FW will apply a x2 */
     threshold16 = (uint16_t)((threshold_low >> 17) & 0x00fff);
-    status = VL53L0X_write_word(dev, VL53L0X_REG_SYSTEM_THRESH_LOW, threshold16);
+    status = VL53L0X_write_word(VL53L0X_REG_SYSTEM_THRESH_LOW,threshold16);
 
     if (status == VL53L0X_ERROR_NONE) {
         /* Need to divide by 2 because the FW will apply a x2 */
         threshold16 = (uint16_t)((threshold_high >> 17) & 0x00fff);
-        status = VL53L0X_write_word(dev, VL53L0X_REG_SYSTEM_THRESH_HIGH,
+        status = VL53L0X_write_word(VL53L0X_REG_SYSTEM_THRESH_HIGH,
                                     threshold16);
     }
 
@@ -2276,8 +2102,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_interrupt_thresholds(VL53L0X_DEV dev,
-        VL53L0X_DeviceModes device_mode, FixPoint1616_t *p_threshold_low,
+VL53L0X_Error VL53L0X::VL53L0X_get_interrupt_thresholds(VL53L0X_DeviceModes device_mode,FixPoint1616_t *p_threshold_low,
         FixPoint1616_t *p_threshold_high)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -2286,12 +2111,12 @@
 
     /* no dependency on DeviceMode for FlightSense */
 
-    status = VL53L0X_read_word(dev, VL53L0X_REG_SYSTEM_THRESH_LOW, &threshold16);
+    status = VL53L0X_read_word(VL53L0X_REG_SYSTEM_THRESH_LOW,&threshold16);
     /* Need to multiply by 2 because the FW will apply a x2 */
     *p_threshold_low = (FixPoint1616_t)((0x00fff & threshold16) << 17);
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_read_word(dev, VL53L0X_REG_SYSTEM_THRESH_HIGH,
+        status = VL53L0X_read_word(VL53L0X_REG_SYSTEM_THRESH_HIGH,
                                    &threshold16);
         /* Need to multiply by 2 because the FW will apply a x2 */
         *p_threshold_high =
@@ -2302,8 +2127,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_load_tuning_settings(VL53L0X_DEV dev,
-        uint8_t *p_tuning_setting_buffer)
+VL53L0X_Error VL53L0X::VL53L0X_load_tuning_settings(uint8_t *p_tuning_setting_buffer)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     int i;
@@ -2334,33 +2158,32 @@
                     index++;
                     lsb = *(p_tuning_setting_buffer + index);
                     index++;
-                    temp16 = VL53L0X_MAKEUINT16(lsb, msb);
-                    PALDevDataSet(dev, SigmaEstRefArray, temp16);
+                    temp16 = VL53L0X_MAKEUINT16(lsb,msb);
+                    _device->SigmaEstRefArray = temp16; 
                     break;
                 case 1: /* uint16_t SigmaEstEffPulseWidth -> 2 bytes */
                     msb = *(p_tuning_setting_buffer + index);
                     index++;
                     lsb = *(p_tuning_setting_buffer + index);
                     index++;
-                    temp16 = VL53L0X_MAKEUINT16(lsb, msb);
-                    PALDevDataSet(dev, SigmaEstEffPulseWidth,
-                                  temp16);
+                    temp16 = VL53L0X_MAKEUINT16(lsb,msb);
+                    _device->SigmaEstEffPulseWidth = temp16; 
                     break;
                 case 2: /* uint16_t SigmaEstEffAmbWidth -> 2 bytes */
                     msb = *(p_tuning_setting_buffer + index);
                     index++;
                     lsb = *(p_tuning_setting_buffer + index);
                     index++;
-                    temp16 = VL53L0X_MAKEUINT16(lsb, msb);
-                    PALDevDataSet(dev, SigmaEstEffAmbWidth, temp16);
+                    temp16 = VL53L0X_MAKEUINT16(lsb,msb);
+                    _device->SigmaEstEffAmbWidth = temp16; 
                     break;
                 case 3: /* uint16_t targetRefRate -> 2 bytes */
                     msb = *(p_tuning_setting_buffer + index);
                     index++;
                     lsb = *(p_tuning_setting_buffer + index);
                     index++;
-                    temp16 = VL53L0X_MAKEUINT16(lsb, msb);
-                    PALDevDataSet(dev, targetRefRate, temp16);
+                    temp16 = VL53L0X_MAKEUINT16(lsb,msb);
+                    _device->targetRefRate = temp16; 
                     break;
                 default: /* invalid parameter */
                     status = VL53L0X_ERROR_INVALID_PARAMS;
@@ -2376,7 +2199,7 @@
                 index++;
             }
 
-            status = VL53L0X_write_multi(dev, address, local_buffer,
+            status = VL53L0X_write_multi(address,local_buffer,
                                          number_of_writes);
 
         } else {
@@ -2388,16 +2211,14 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_check_and_load_interrupt_settings(VL53L0X_DEV dev,
-        uint8_t start_not_stopflag)
+VL53L0X_Error VL53L0X::VL53L0X_check_and_load_interrupt_settings(uint8_t start_not_stopflag)
 {
     uint8_t interrupt_config;
     FixPoint1616_t threshold_low;
     FixPoint1616_t threshold_high;
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
 
-    interrupt_config = VL53L0X_GETDEVICESPECIFICPARAMETER(dev,
-                       Pin0GpioFunctionality);
+    interrupt_config = _device->DeviceSpecificParameters.Pin0GpioFunctionality; 
 
     if ((interrupt_config ==
             VL53L0X_GPIOFUNCTIONALITY_THRESHOLD_CROSSED_LOW) ||
@@ -2406,22 +2227,20 @@
             (interrupt_config ==
              VL53L0X_GPIOFUNCTIONALITY_THRESHOLD_CROSSED_OUT)) {
 
-        status = VL53L0X_get_interrupt_thresholds(dev,
-                 VL53L0X_DEVICEMODE_CONTINUOUS_RANGING,
-                 &threshold_low, &threshold_high);
+        status = VL53L0X_get_interrupt_thresholds(VL53L0X_DEVICEMODE_CONTINUOUS_RANGING,
+                 &threshold_low,&threshold_high);
 
         if (((threshold_low > 255 * 65536) ||
                 (threshold_high > 255 * 65536)) &&
                 (status == VL53L0X_ERROR_NONE)) {
 
             if (start_not_stopflag != 0) {
-                status = VL53L0X_load_tuning_settings(dev,
-                                                      InterruptThresholdSettings);
+                status = VL53L0X_load_tuning_settings(InterruptThresholdSettings);
             } else {
-                status |= VL53L0X_write_byte(dev, 0xFF, 0x04);
-                status |= VL53L0X_write_byte(dev, 0x70, 0x00);
-                status |= VL53L0X_write_byte(dev, 0xFF, 0x00);
-                status |= VL53L0X_write_byte(dev, 0x80, 0x00);
+                status |= VL53L0X_write_byte(0xFF,0x04);
+                status |= VL53L0X_write_byte(0x70,0x00);
+                status |= VL53L0X_write_byte(0xFF,0x00);
+                status |= VL53L0X_write_byte(0x80,0x00);
             }
 
         }
@@ -2433,7 +2252,7 @@
 
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_start_measurement(VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::VL53L0X_start_measurement()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     VL53L0X_DeviceModes device_mode;
@@ -2443,19 +2262,19 @@
     
 
     /* Get Current DeviceMode */
-    VL53L0X_get_device_mode(dev, &device_mode);
-
-    status = VL53L0X_write_byte(dev, 0x80, 0x01);
-    status = VL53L0X_write_byte(dev, 0xFF, 0x01);
-    status = VL53L0X_write_byte(dev, 0x00, 0x00);
-    status = VL53L0X_write_byte(dev, 0x91, PALDevDataGet(dev, StopVariable));
-    status = VL53L0X_write_byte(dev, 0x00, 0x01);
-    status = VL53L0X_write_byte(dev, 0xFF, 0x00);
-    status = VL53L0X_write_byte(dev, 0x80, 0x00);
+    VL53L0X_get_device_mode(&device_mode);
+
+    status = VL53L0X_write_byte(0x80,0x01);
+    status = VL53L0X_write_byte(0xFF,0x01);
+    status = VL53L0X_write_byte(0x00,0x00);
+    status = VL53L0X_write_byte(0x91,_device-> StopVariable);
+    status = VL53L0X_write_byte(0x00,0x01);
+    status = VL53L0X_write_byte(0xFF,0x00);
+    status = VL53L0X_write_byte(0x80,0x00);
 
     switch (device_mode) {
         case VL53L0X_DEVICEMODE_SINGLE_RANGING:
-            status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSRANGE_START, 0x01);
+            status = VL53L0X_write_byte(VL53L0X_REG_SYSRANGE_START,0x01);
 
             byte = start_stop_byte;
             if (status == VL53L0X_ERROR_NONE) {
@@ -2463,8 +2282,7 @@
                 loop_nb = 0;
                 do {
                     if (loop_nb > 0)
-                        status = VL53L0X_read_byte(dev,
-                                                   VL53L0X_REG_SYSRANGE_START, &byte);
+                        status = VL53L0X_read_byte(VL53L0X_REG_SYSRANGE_START,&byte);
                     loop_nb = loop_nb + 1;
                 } while (((byte & start_stop_byte) == start_stop_byte)
                          && (status == VL53L0X_ERROR_NONE)
@@ -2482,31 +2300,29 @@
 
             /* Check if need to apply interrupt settings */
             if (status == VL53L0X_ERROR_NONE) {
-                status = VL53L0X_check_and_load_interrupt_settings(dev, 1);
+                status = VL53L0X_check_and_load_interrupt_settings(1);
             }
 
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_SYSRANGE_START,
+            status = VL53L0X_write_byte(VL53L0X_REG_SYSRANGE_START,
                                         VL53L0X_REG_SYSRANGE_MODE_BACKTOBACK);
             if (status == VL53L0X_ERROR_NONE) {
                 /* Set PAL State to Running */
-                PALDevDataSet(dev, PalState, VL53L0X_STATE_RUNNING);
+                _device->PalState = VL53L0X_STATE_RUNNING; 
             }
             break;
         case VL53L0X_DEVICEMODE_CONTINUOUS_TIMED_RANGING:
             /* Continuous mode */
             /* Check if need to apply interrupt settings */
             if (status == VL53L0X_ERROR_NONE) {
-                status = VL53L0X_check_and_load_interrupt_settings(dev, 1);
+                status = VL53L0X_check_and_load_interrupt_settings(1);
             }
 
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_SYSRANGE_START,
+            status = VL53L0X_write_byte(VL53L0X_REG_SYSRANGE_START,
                                         VL53L0X_REG_SYSRANGE_MODE_TIMED);
 
             if (status == VL53L0X_ERROR_NONE) {
                 /* Set PAL State to Running */
-                PALDevDataSet(dev, PalState, VL53L0X_STATE_RUNNING);
+                _device->PalState = VL53L0X_STATE_RUNNING; 
             }
             break;
         default:
@@ -2520,7 +2336,7 @@
 }
 
 /* Group PAL Measurement Functions */
-VL53L0X_Error VL53L0X::VL53L0X_perform_single_measurement(VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::VL53L0X_perform_single_measurement()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     VL53L0X_DeviceModes device_mode;
@@ -2528,25 +2344,25 @@
     
 
     /* Get Current DeviceMode */
-    status = VL53L0X_get_device_mode(dev, &device_mode);
+    status = VL53L0X_get_device_mode(&device_mode);
 
     /* Start immediately to run a single ranging measurement in case of
      * single ranging or single histogram */
     if (status == VL53L0X_ERROR_NONE
             && device_mode == VL53L0X_DEVICEMODE_SINGLE_RANGING) {
-        status = VL53L0X_start_measurement(dev);
+        status = VL53L0X_start_measurement();
     }
 
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_measurement_poll_for_completion(dev);
+        status = VL53L0X_measurement_poll_for_completion();
     }
 
 
     /* Change PAL State in case of single ranging or single histogram */
     if (status == VL53L0X_ERROR_NONE
             && device_mode == VL53L0X_DEVICEMODE_SINGLE_RANGING) {
-        PALDevDataSet(dev, PalState, VL53L0X_STATE_IDLE);
+        _device->PalState = VL53L0X_STATE_IDLE; 
     }
 
 
@@ -2554,22 +2370,20 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_x_talk_compensation_enable(VL53L0X_DEV dev,
-        uint8_t *p_x_talk_compensation_enable)
+VL53L0X_Error VL53L0X::VL53L0X_get_x_talk_compensation_enable(uint8_t *p_x_talk_compensation_enable)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t temp8;
     
 
-    VL53L0X_GETPARAMETERFIELD(dev, XTalkCompensationEnable, temp8);
+    temp8 = _device->CurrentParameters.XTalkCompensationEnable; 
     *p_x_talk_compensation_enable = temp8;
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_total_xtalk_rate(VL53L0X_DEV dev,
-        VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data,
+VL53L0X_Error VL53L0X::VL53L0X_get_total_xtalk_rate(VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data,
         FixPoint1616_t *p_total_xtalk_rate_mcps)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -2580,15 +2394,12 @@
 
     *p_total_xtalk_rate_mcps = 0;
 
-    status = VL53L0X_get_x_talk_compensation_enable(dev, &xtalk_comp_enable);
+    status = VL53L0X_get_x_talk_compensation_enable(&xtalk_comp_enable);
     if (status == VL53L0X_ERROR_NONE) {
 
         if (xtalk_comp_enable) {
 
-            VL53L0X_GETPARAMETERFIELD(
-                dev,
-                XTalkCompensationRateMegaCps,
-                xtalk_per_spad_mega_cps);
+            xtalk_per_spad_mega_cps = _device->CurrentParameters.XTalkCompensationRateMegaCps; 
 
             /* FixPoint1616 * FixPoint 8:8 = FixPoint0824 */
             total_xtalk_mega_cps =
@@ -2604,8 +2415,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_total_signal_rate(VL53L0X_DEV dev,
-        VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data,
+VL53L0X_Error VL53L0X::VL53L0X_get_total_signal_rate(VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data,
         FixPoint1616_t *p_total_signal_rate_mcps)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -2616,8 +2426,7 @@
     *p_total_signal_rate_mcps =
         p_ranging_measurement_data->SignalRateRtnMegaCps;
 
-    status = VL53L0X_get_total_xtalk_rate(
-                 dev, p_ranging_measurement_data, &total_xtalk_mega_cps);
+    status = VL53L0X_get_total_xtalk_rate(p_ranging_measurement_data,&total_xtalk_mega_cps);
 
     if (status == VL53L0X_ERROR_NONE) {
         *p_total_signal_rate_mcps += total_xtalk_mega_cps;
@@ -2627,15 +2436,14 @@
 }
 
 /* To convert ms into register value */
-uint32_t VL53L0X::VL53L0X_calc_timeout_mclks(VL53L0X_DEV dev,
-        uint32_t timeout_period_us,
+uint32_t VL53L0X::VL53L0X_calc_timeout_mclks(uint32_t timeout_period_us,
         uint8_t vcsel_period_pclks)
 {
     uint32_t macro_period_ps;
     uint32_t macro_period_ns;
     uint32_t timeout_period_mclks = 0;
 
-    macro_period_ps = VL53L0X_calc_macro_period_ps(dev, vcsel_period_pclks);
+    macro_period_ps = VL53L0X_calc_macro_period_ps(vcsel_period_pclks);
     macro_period_ns = (macro_period_ps + 500) / 1000;
 
     timeout_period_mclks =
@@ -2656,7 +2464,7 @@
     uint32_t  res = 0;
     uint32_t  bit = 1 << 30;
     /* The second-to-top bit is set:
-     *	1 << 14 for 16-bits, 1 << 30 for 32 bits */
+     *	1 << 14 for 16-bits,1 << 30 for 32 bits */
 
     /* "bit" starts at the highest power of four <= the argument. */
     while (bit > num) {
@@ -2678,9 +2486,7 @@
     return res;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_calc_dmax(
-    VL53L0X_DEV dev,
-    FixPoint1616_t total_signal_rate_mcps,
+VL53L0X_Error VL53L0X::VL53L0X_calc_dmax(FixPoint1616_t total_signal_rate_mcps,
     FixPoint1616_t total_corr_signal_rate_mcps,
     FixPoint1616_t pw_mult,
     uint32_t sigma_estimate_p1,
@@ -2715,10 +2521,10 @@
     
 
     dmax_cal_range_mm =
-        PALDevDataGet(dev, DmaxCalRangeMilliMeter);
+        _device-> DmaxCalRangeMilliMeter;
 
     dmax_cal_signal_rate_rtn_mcps =
-        PALDevDataGet(dev, DmaxCalSignalRateRtnMegaCps);
+        _device-> DmaxCalSignalRateRtnMegaCps;
 
     /* uint32 * FixPoint1616 = FixPoint1616 */
     signal_at0_mm = dmax_cal_range_mm * dmax_cal_signal_rate_rtn_mcps;
@@ -2774,7 +2580,7 @@
         min_signal_needed_p3 = 0xfff00000;
     } else {
 
-        /* DMAX uses a different ambient width from sigma, so apply
+        /* DMAX uses a different ambient width from sigma,so apply
          * correction.
          * Perform division before multiplication to prevent overflow.
          */
@@ -2872,14 +2678,13 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_calc_sigma_estimate(VL53L0X_DEV dev,
-        VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data,
+VL53L0X_Error VL53L0X::VL53L0X_calc_sigma_estimate(VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data,
         FixPoint1616_t *p_sigma_estimate,
         uint32_t *p_dmax_mm)
 {
-    /* Expressed in 100ths of a ns, i.e. centi-ns */
+    /* Expressed in 100ths of a ns,i.e. centi-ns */
     const uint32_t c_pulse_effective_width_centi_ns   = 800;
-    /* Expressed in 100ths of a ns, i.e. centi-ns */
+    /* Expressed in 100ths of a ns,i.e. centi-ns */
     const uint32_t c_ambient_effective_width_centi_ns = 600;
     const FixPoint1616_t c_dflt_final_range_integration_time_milli_secs	= 0x00190000; /* 25ms */
     const uint32_t c_vcsel_pulse_width_ps	= 4700; /* pico secs */
@@ -2934,8 +2739,7 @@
 
     
 
-    VL53L0X_GETPARAMETERFIELD(dev, XTalkCompensationRateMegaCps,
-                              x_talk_comp_rate_mcps);
+    x_talk_comp_rate_mcps = _device->CurrentParameters.XTalkCompensationRateMegaCps; 
 
     /*
      * We work in kcps rather than mcps as this helps keep within the
@@ -2949,14 +2753,12 @@
         p_ranging_measurement_data->SignalRateRtnMegaCps;
 
 
-    status = VL53L0X_get_total_signal_rate(
-                 dev, p_ranging_measurement_data, &total_signal_rate_mcps);
-    status = VL53L0X_get_total_xtalk_rate(
-                 dev, p_ranging_measurement_data, &x_talk_comp_rate_mcps);
+    status = VL53L0X_get_total_signal_rate(p_ranging_measurement_data,&total_signal_rate_mcps);
+    status = VL53L0X_get_total_xtalk_rate(p_ranging_measurement_data,&x_talk_comp_rate_mcps);
 
 
     /* Signal rate measurement provided by device is the
-     * peak signal rate, not average.
+     * peak signal rate,not average.
      */
     peak_signal_rate_kcps = (total_signal_rate_mcps * 1000);
     peak_signal_rate_kcps = (peak_signal_rate_kcps + 0x8000) >> 16;
@@ -2970,24 +2772,18 @@
     if (status == VL53L0X_ERROR_NONE) {
 
         /* Calculate final range macro periods */
-        final_range_timeout_micro_secs = VL53L0X_GETDEVICESPECIFICPARAMETER(
-                                             dev, FinalRangeTimeoutMicroSecs);
-
-        final_range_vcsel_pclks = VL53L0X_GETDEVICESPECIFICPARAMETER(
-                                      dev, FinalRangeVcselPulsePeriod);
-
-        final_range_macro_pclks = VL53L0X_calc_timeout_mclks(
-                                      dev, final_range_timeout_micro_secs, final_range_vcsel_pclks);
+        final_range_timeout_micro_secs = _device->DeviceSpecificParameters.FinalRangeTimeoutMicroSecs; 
+
+        final_range_vcsel_pclks = _device->DeviceSpecificParameters.FinalRangeVcselPulsePeriod; 
+
+        final_range_macro_pclks = VL53L0X_calc_timeout_mclks(final_range_timeout_micro_secs,final_range_vcsel_pclks);
 
         /* Calculate pre-range macro periods */
-        pre_range_timeout_micro_secs = VL53L0X_GETDEVICESPECIFICPARAMETER(
-                                           dev, PreRangeTimeoutMicroSecs);
-
-        pre_range_vcsel_pclks = VL53L0X_GETDEVICESPECIFICPARAMETER(
-                                    dev, PreRangeVcselPulsePeriod);
-
-        pre_range_macro_pclks = VL53L0X_calc_timeout_mclks(
-                                    dev, pre_range_timeout_micro_secs, pre_range_vcsel_pclks);
+        pre_range_timeout_micro_secs = _device->DeviceSpecificParameters.PreRangeTimeoutMicroSecs; 
+
+        pre_range_vcsel_pclks = _device->DeviceSpecificParameters.PreRangeVcselPulsePeriod; 
+
+        pre_range_macro_pclks = VL53L0X_calc_timeout_mclks(pre_range_timeout_micro_secs,pre_range_vcsel_pclks);
 
         vcsel_width = 3;
         if (final_range_vcsel_pclks == 8) {
@@ -3022,7 +2818,7 @@
 
     if (peak_signal_rate_kcps == 0) {
         *p_sigma_estimate = c_sigma_est_max;
-        PALDevDataSet(dev, SigmaEstimate, c_sigma_est_max);
+        _device->SigmaEstimate = c_sigma_est_max; 
         *p_dmax_mm = 0;
     } else {
         if (vcsel_total_events_rtn < 1) {
@@ -3065,7 +2861,7 @@
 
         /* FixPoint0824/FixPoint1616 = FixPoint2408 */
 //		xTalkCorrection	 = abs(diff1_mcps/diff2_mcps);
-// abs is causing compiler overloading isue in C++, but unsigned types. So, redundant call anyway!
+// abs is causing compiler overloading isue in C++,but unsigned types. So,redundant call anyway!
         x_talk_correction	 = diff1_mcps / diff2_mcps;
 
         /* FixPoint2408 << 8 = FixPoint1616 */
@@ -3078,7 +2874,7 @@
             pw_mult = delta_t_ps / c_vcsel_pulse_width_ps; /* smaller than 1.0f */
 
             /*
-             * FixPoint1616 * FixPoint1616 = FixPoint3232, however both
+             * FixPoint1616 * FixPoint1616 = FixPoint3232,however both
              * values are small enough such that32 bits will not be
              * exceeded.
              */
@@ -3091,7 +2887,7 @@
             pw_mult += (1 << 16);
 
             /*
-             * At this point the value will be 1.xx, therefore if we square
+             * At this point the value will be 1.xx,therefore if we square
              * the value this will exceed 32 bits. To address this perform
              * a single shift to the right before the multiplication.
              */
@@ -3171,7 +2967,7 @@
         sqrt_result = VL53L0X_isqrt((sqr1 + sqr2));
         /*
          * Note that the Shift by 4 bits increases resolution prior to
-         * the sqrt, therefore the result must be shifted by 2 bits to
+         * the sqrt,therefore the result must be shifted by 2 bits to
          * the right to revert back to the FixPoint1616 format.
          */
 
@@ -3183,10 +2979,8 @@
         }
 
         *p_sigma_estimate = (uint32_t)(sigma_estimate);
-        PALDevDataSet(dev, SigmaEstimate, *p_sigma_estimate);
-        status = VL53L0X_calc_dmax(
-                     dev,
-                     total_signal_rate_mcps,
+        _device->SigmaEstimate = *p_sigma_estimate;
+        status = VL53L0X_calc_dmax(total_signal_rate_mcps,
                      corrected_signal_rate_mcps,
                      pw_mult,
                      sigma_estimate_p1,
@@ -3199,8 +2993,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_pal_range_status(VL53L0X_DEV dev,
-        uint8_t device_range_status,
+VL53L0X_Error VL53L0X::VL53L0X_get_pal_range_status(uint8_t device_range_status,
         FixPoint1616_t signal_rate,
         uint16_t effective_spad_rtn_count,
         VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data,
@@ -3233,13 +3026,13 @@
      * VL53L0X has a good ranging when the value of the
      * DeviceRangeStatus = 11. This function will replace the value 0 with
      * the value 11 in the DeviceRangeStatus.
-     * In addition, the SigmaEstimator is not included in the VL53L0X
-     * DeviceRangeStatus, this will be added in the PalRangeStatus.
+     * In addition,the SigmaEstimator is not included in the VL53L0X
+     * DeviceRangeStatus,this will be added in the PalRangeStatus.
      */
 
     device_range_status_internal = ((device_range_status & 0x78) >> 3);
 
-    if (device_range_status_internal == 0 ||
+    if ( device_range_status_internal == 0 ||
             device_range_status_internal == 5 ||
             device_range_status_internal == 7 ||
             device_range_status_internal == 12 ||
@@ -3253,12 +3046,11 @@
     }
 
     /*
-     * Check if Sigma limit is enabled, if yes then do comparison with limit
+     * Check if Sigma limit is enabled,if yes then do comparison with limit
      * value and put the result back into pPalRangeStatus.
      */
     if (status == VL53L0X_ERROR_NONE) {
-        status =  VL53L0X_get_limit_check_enable(dev,
-                  VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE,
+        status =  VL53L0X_get_limit_check_enable(VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE,
                   &sigma_limit_check_enable);
     }
 
@@ -3266,9 +3058,7 @@
         /*
         * compute the Sigma and check with limit
         */
-        status = VL53L0X_calc_sigma_estimate(
-                     dev,
-                     p_ranging_measurement_data,
+        status = VL53L0X_calc_sigma_estimate(p_ranging_measurement_data,
                      &sigma_estimate,
                      &dmax_mm);
         if (status == VL53L0X_ERROR_NONE) {
@@ -3276,8 +3066,7 @@
         }
 
         if (status == VL53L0X_ERROR_NONE) {
-            status = VL53L0X_get_limit_check_value(dev,
-                                                   VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE,
+            status = VL53L0X_get_limit_check_value(VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE,
                                                    &sigma_limit_value);
 
             if ((sigma_limit_value > 0) &&
@@ -3289,39 +3078,36 @@
     }
 
     /*
-     * Check if Signal ref clip limit is enabled, if yes then do comparison
+     * Check if Signal ref clip limit is enabled,if yes then do comparison
      * with limit value and put the result back into pPalRangeStatus.
      */
     if (status == VL53L0X_ERROR_NONE) {
-        status =  VL53L0X_get_limit_check_enable(dev,
-                  VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP,
+        status =  VL53L0X_get_limit_check_enable(VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP,
                   &signal_ref_clip_limit_check_enable);
     }
 
     if ((signal_ref_clip_limit_check_enable != 0) &&
             (status == VL53L0X_ERROR_NONE)) {
 
-        status = VL53L0X_get_limit_check_value(dev,
-                                               VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP,
+        status = VL53L0X_get_limit_check_value(VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP,
                                                &signal_ref_clip_value);
 
         /* Read LastSignalRefMcps from device */
         if (status == VL53L0X_ERROR_NONE) {
-            status = VL53L0X_write_byte(dev, 0xFF, 0x01);
+            status = VL53L0X_write_byte(0xFF,0x01);
         }
 
         if (status == VL53L0X_ERROR_NONE) {
-            status = VL53L0X_read_word(dev,
-                                       VL53L0X_REG_RESULT_PEAK_SIGNAL_RATE_REF,
+            status = VL53L0X_read_word(VL53L0X_REG_RESULT_PEAK_SIGNAL_RATE_REF,
                                        &tmp_word);
         }
 
         if (status == VL53L0X_ERROR_NONE) {
-            status = VL53L0X_write_byte(dev, 0xFF, 0x00);
+            status = VL53L0X_write_byte(0xFF,0x00);
         }
 
         last_signal_ref_mcps = VL53L0X_FIXPOINT97TOFIXPOINT1616(tmp_word);
-        PALDevDataSet(dev, LastSignalRefMcps, last_signal_ref_mcps);
+        _device->LastSignalRefMcps = last_signal_ref_mcps; 
 
         if ((signal_ref_clip_value > 0) &&
                 (last_signal_ref_mcps > signal_ref_clip_value)) {
@@ -3331,14 +3117,13 @@
     }
 
     /*
-     * Check if Signal ref clip limit is enabled, if yes then do comparison
+     * Check if Signal ref clip limit is enabled,if yes then do comparison
      * with limit value and put the result back into pPalRangeStatus.
      * EffectiveSpadRtnCount has a format 8.8
      * If (Return signal rate < (1.5 x Xtalk x number of Spads)) : FAIL
      */
     if (status == VL53L0X_ERROR_NONE) {
-        status =  VL53L0X_get_limit_check_enable(dev,
-                  VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD,
+        status =  VL53L0X_get_limit_check_enable(VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD,
                   &range_ignore_threshold_limit_check_enable);
     }
 
@@ -3353,8 +3138,7 @@
                                                     / effective_spad_rtn_count);
         }
 
-        status = VL53L0X_get_limit_check_value(dev,
-                                               VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD,
+        status = VL53L0X_get_limit_check_value(VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD,
                                                &range_ignore_threshold_value);
 
         if ((range_ignore_threshold_value > 0) &&
@@ -3395,8 +3179,7 @@
 
     /* fill the Limit Check Status */
 
-    status =  VL53L0X_get_limit_check_enable(dev,
-              VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE,
+    status =  VL53L0X_get_limit_check_enable(VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE,
               &signal_rate_final_range_limit_check_enable);
 
     if (status == VL53L0X_ERROR_NONE) {
@@ -3405,8 +3188,7 @@
         } else {
             temp8 = 0;
         }
-        VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksStatus,
-                                       VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE, temp8);
+         _device->CurrentParameters.LimitChecksStatus[VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE] = temp8; 
 
         if ((device_range_status_internal == 4) ||
                 (signal_rate_final_range_limit_check_enable == 0)) {
@@ -3414,9 +3196,7 @@
         } else {
             temp8 = 0;
         }
-        VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksStatus,
-                                       VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE,
-                                       temp8);
+         _device->CurrentParameters.LimitChecksStatus[VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE] = temp8; 
 
         if ((signal_ref_clip_limit_check_enable == 0) ||
                 (signal_ref_clipflag == 1)) {
@@ -3425,8 +3205,7 @@
             temp8 = 0;
         }
 
-        VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksStatus,
-                                       VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP, temp8);
+         _device->CurrentParameters.LimitChecksStatus[VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP] = temp8; 
 
         if ((range_ignore_threshold_limit_check_enable == 0) ||
                 (range_ignore_thresholdflag == 1)) {
@@ -3435,9 +3214,7 @@
             temp8 = 0;
         }
 
-        VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksStatus,
-                                       VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD,
-                                       temp8);
+         _device->CurrentParameters.LimitChecksStatus[VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD] = temp8; 
     }
 
     
@@ -3445,8 +3222,7 @@
 
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_ranging_measurement_data(VL53L0X_DEV dev,
-        VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data)
+VL53L0X_Error VL53L0X::VL53L0X_get_ranging_measurement_data(VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t device_range_status;
@@ -3466,31 +3242,30 @@
     
 
     /*
-     * use multi read even if some registers are not useful, result will
+     * use multi read even if some registers are not useful,result will
      * be more efficient
      * start reading at 0x14 dec20
      * end reading at 0x21 dec33 total 14 bytes to read
      */
-    status = VL53L0X_read_multi(dev, 0x14, localBuffer, 12);
+    status = VL53L0X_read_multi(0x14,localBuffer,12);
 
     if (status == VL53L0X_ERROR_NONE) {
 
         p_ranging_measurement_data->ZoneId = 0; /* Only one zone */
         p_ranging_measurement_data->TimeStamp = 0; /* Not Implemented */
 
-        tmpuint16 = VL53L0X_MAKEUINT16(localBuffer[11], localBuffer[10]);
+        tmpuint16 = VL53L0X_MAKEUINT16(localBuffer[11],localBuffer[10]);
         /* cut1.1 if SYSTEM__RANGE_CONFIG if 1 range is 2bits fractional
          *(format 11.2) else no fractional
          */
 
         p_ranging_measurement_data->MeasurementTimeUsec = 0;
 
-        signal_rate = VL53L0X_FIXPOINT97TOFIXPOINT1616(
-                          VL53L0X_MAKEUINT16(localBuffer[7], localBuffer[6]));
+        signal_rate = VL53L0X_FIXPOINT97TOFIXPOINT1616(VL53L0X_MAKEUINT16(localBuffer[7],localBuffer[6]));
         /* peak_signal_count_rate_rtn_mcps */
         p_ranging_measurement_data->SignalRateRtnMegaCps = signal_rate;
 
-        ambient_rate = VL53L0X_MAKEUINT16(localBuffer[9], localBuffer[8]);
+        ambient_rate = VL53L0X_MAKEUINT16(localBuffer[9],localBuffer[8]);
         p_ranging_measurement_data->AmbientRateRtnMegaCps =
             VL53L0X_FIXPOINT97TOFIXPOINT1616(ambient_rate);
 
@@ -3503,12 +3278,12 @@
         device_range_status = localBuffer[0];
 
         /* Get Linearity Corrective Gain */
-        linearity_corrective_gain = PALDevDataGet(dev,
-                                    LinearityCorrectiveGain);
+        linearity_corrective_gain = _device->
+                                    LinearityCorrectiveGain;
 
         /* Get ranging configuration */
-        range_fractional_enable = PALDevDataGet(dev,
-                                                RangeFractionalEnable);
+        range_fractional_enable = _device->
+                                                RangeFractionalEnable;
 
         if (linearity_corrective_gain != 1000) {
 
@@ -3516,11 +3291,8 @@
                                     * tmpuint16 + 500) / 1000);
 
             /* Implement Xtalk */
-            VL53L0X_GETPARAMETERFIELD(dev,
-                                      XTalkCompensationRateMegaCps,
-                                      x_talk_compensation_rate_mega_cps);
-            VL53L0X_GETPARAMETERFIELD(dev, XTalkCompensationEnable,
-                                      x_talk_compensation_enable);
+            x_talk_compensation_rate_mega_cps = _device->CurrentParameters.XTalkCompensationRateMegaCps; 
+            x_talk_compensation_enable = _device->CurrentParameters.XTalkCompensationEnable; 
 
             if (x_talk_compensation_enable) {
 
@@ -3558,14 +3330,14 @@
         }
 
         /*
-         * For a standard definition of RangeStatus, this should
+         * For a standard definition of RangeStatus,this should
          * return 0 in case of good result after a ranging
          * The range status depends on the device so call a device
          * specific function to obtain the right Status.
          */
-        status |= VL53L0X_get_pal_range_status(dev, device_range_status,
-                                               signal_rate, effective_spad_rtn_count,
-                                               p_ranging_measurement_data, &pal_range_status);
+        status |= VL53L0X_get_pal_range_status(device_range_status,
+                                               signal_rate,effective_spad_rtn_count,
+                                               p_ranging_measurement_data,&pal_range_status);
 
         if (status == VL53L0X_ERROR_NONE) {
             p_ranging_measurement_data->RangeStatus = pal_range_status;
@@ -3575,7 +3347,7 @@
 
     if (status == VL53L0X_ERROR_NONE) {
         /* Copy last read data into Dev buffer */
-        last_range_data_buffer = PALDevDataGet(dev, LastRangeMeasure);
+        last_range_data_buffer = _device-> LastRangeMeasure;
 
         last_range_data_buffer.RangeMilliMeter =
             p_ranging_measurement_data->RangeMilliMeter;
@@ -3594,15 +3366,14 @@
         last_range_data_buffer.RangeStatus =
             p_ranging_measurement_data->RangeStatus;
 
-        PALDevDataSet(dev, LastRangeMeasure, last_range_data_buffer);
+        _device->LastRangeMeasure = last_range_data_buffer; 
     }
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_perform_single_ranging_measurement(VL53L0X_DEV dev,
-        VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data)
+VL53L0X_Error VL53L0X::VL53L0X_perform_single_ranging_measurement(VL53L0X_RangingMeasurementData_t *p_ranging_measurement_data)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
 
@@ -3610,27 +3381,25 @@
 
     /* This function will do a complete single ranging
      * Here we fix the mode! */
-    status = VL53L0X_set_device_mode(dev, VL53L0X_DEVICEMODE_SINGLE_RANGING);
+    status = VL53L0X_set_device_mode(VL53L0X_DEVICEMODE_SINGLE_RANGING);
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_perform_single_measurement(dev);
+        status = VL53L0X_perform_single_measurement();
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_get_ranging_measurement_data(dev,
-                 p_ranging_measurement_data);
+        status = VL53L0X_get_ranging_measurement_data(p_ranging_measurement_data);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_clear_interrupt_mask(dev, 0);
+        status = VL53L0X_clear_interrupt_mask(0);
     }
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::perform_ref_signal_measurement(VL53L0X_DEV dev,
-        uint16_t *p_ref_signal_rate)
+VL53L0X_Error VL53L0X::perform_ref_signal_measurement(uint16_t *p_ref_signal_rate)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     VL53L0X_RangingMeasurementData_t ranging_measurement_data;
@@ -3641,49 +3410,45 @@
      * this will be reset before the end of the function
      */
 
-    sequence_config = PALDevDataGet(dev, SequenceConfig);
+    sequence_config = _device-> SequenceConfig;
 
     /*
      * This function performs a reference signal rate measurement.
      */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev,
-                                    VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG, 0xC0);
+        status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,0xC0);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_perform_single_ranging_measurement(dev,
-                 &ranging_measurement_data);
+        status = VL53L0X_perform_single_ranging_measurement(&ranging_measurement_data);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev, 0xFF, 0x01);
+        status = VL53L0X_write_byte(0xFF,0x01);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_read_word(dev,
-                                   VL53L0X_REG_RESULT_PEAK_SIGNAL_RATE_REF,
+        status = VL53L0X_read_word(VL53L0X_REG_RESULT_PEAK_SIGNAL_RATE_REF,
                                    p_ref_signal_rate);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev, 0xFF, 0x00);
+        status = VL53L0X_write_byte(0xFF,0x00);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
         /* restore the previous Sequence Config */
-        status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
+        status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
                                     sequence_config);
         if (status == VL53L0X_ERROR_NONE) {
-            PALDevDataSet(dev, SequenceConfig, sequence_config);
+            _device->SequenceConfig = sequence_config; 
         }
     }
 
     return status;
 }
 
-VL53L0X_Error VL53L0X::wrapped_VL53L0X_perform_ref_spad_management(VL53L0X_DEV dev,
-        uint32_t *ref_spad_count,
+VL53L0X_Error VL53L0X::wrapped_VL53L0X_perform_ref_spad_management(uint32_t *ref_spad_count,
         uint8_t *is_aperture_spads)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -3713,22 +3478,22 @@
      * signal rate and should be performed once during initialization.
      *
      * Either aperture or non-aperture spads are applied but never both.
-     * Firstly non-aperture spads are set, begining with 5 spads, and
+     * Firstly non-aperture spads are set,begining with 5 spads,and
      * increased one spad at a time until the closest measurement to the
      * target rate is achieved.
      *
      * If the target rate is exceeded when 5 non-aperture spads are enabled,
      * initialization is performed instead with aperture spads.
      *
-     * When setting spads, a 'Good Spad Map' is applied.
+     * When setting spads,a 'Good Spad Map' is applied.
      *
      * This procedure operates within a SPAD window of interest of a maximum
      * 44 spads.
-     * The start point is currently fixed to 180, which lies towards the end
+     * The start point is currently fixed to 180,which lies towards the end
      * of the non-aperture quadrant and runs in to the adjacent aperture
      * quadrant.
      */
-    target_ref_rate = PALDevDataGet(dev, targetRefRate);
+    target_ref_rate = _device-> targetRefRate;
 
     /*
      * Initialize Spad arrays.
@@ -3739,41 +3504,37 @@
      * represent spads.
      */
     for (index = 0; index < spad_array_size; index++) {
-        dev->SpadData.RefSpadEnables[index] = 0;
-    }
-
-
-    status = VL53L0X_write_byte(dev, 0xFF, 0x01);
+        _device->SpadData.RefSpadEnables[index] = 0;
+    }
+
+
+    status = VL53L0X_write_byte(0xFF,0x01);
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev,
-                                    VL53L0X_REG_DYNAMIC_SPAD_REF_EN_START_OFFSET, 0x00);
+        status = VL53L0X_write_byte(VL53L0X_REG_DYNAMIC_SPAD_REF_EN_START_OFFSET,0x00);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev,
-                                    VL53L0X_REG_DYNAMIC_SPAD_NUM_REQUESTED_REF_SPAD, 0x2C);
+        status = VL53L0X_write_byte(VL53L0X_REG_DYNAMIC_SPAD_NUM_REQUESTED_REF_SPAD,0x2C);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev, 0xFF, 0x00);
+        status = VL53L0X_write_byte(0xFF,0x00);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev,
-                                    VL53L0X_REG_GLOBAL_CONFIG_REF_EN_START_SELECT,
+        status = VL53L0X_write_byte(VL53L0X_REG_GLOBAL_CONFIG_REF_EN_START_SELECT,
                                     start_select);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev,
-                                    VL53L0X_REG_POWER_MANAGEMENT_GO1_POWER_FORCE, 0);
+        status = VL53L0X_write_byte(VL53L0X_REG_POWER_MANAGEMENT_GO1_POWER_FORCE,0);
     }
 
     /* Perform ref calibration */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_perform_ref_calibration(dev, &vhv_settings,
-                 &phase_cal, 0);
+        status = VL53L0X_perform_ref_calibration(&vhv_settings,
+                 &phase_cal,0);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
@@ -3781,10 +3542,9 @@
         current_spad_index = 0;
         last_spad_index = current_spad_index;
         need_apt_spads = 0;
-        status = enable_ref_spads(dev,
-                                  need_apt_spads,
-                                  dev->SpadData.RefGoodSpadMap,
-                                  dev->SpadData.RefSpadEnables,
+        status = enable_ref_spads(need_apt_spads,
+                                  _device->SpadData.RefGoodSpadMap,
+                                  _device->SpadData.RefSpadEnables,
                                   spad_array_size,
                                   start_select,
                                   current_spad_index,
@@ -3795,15 +3555,14 @@
     if (status == VL53L0X_ERROR_NONE) {
         current_spad_index = last_spad_index;
 
-        status = perform_ref_signal_measurement(dev,
-                                                &peak_signal_rate_ref);
+        status = perform_ref_signal_measurement(&peak_signal_rate_ref);
         if ((status == VL53L0X_ERROR_NONE) &&
                 (peak_signal_rate_ref > target_ref_rate)) {
             /* Signal rate measurement too high,
              * switch to APERTURE SPADs */
 
             for (index = 0; index < spad_array_size; index++) {
-                dev->SpadData.RefSpadEnables[index] = 0;
+                _device->SpadData.RefSpadEnables[index] = 0;
             }
 
 
@@ -3815,10 +3574,9 @@
 
             need_apt_spads = 1;
 
-            status = enable_ref_spads(dev,
-                                      need_apt_spads,
-                                      dev->SpadData.RefGoodSpadMap,
-                                      dev->SpadData.RefSpadEnables,
+            status = enable_ref_spads(need_apt_spads,
+                                      _device->SpadData.RefGoodSpadMap,
+                                      _device->SpadData.RefSpadEnables,
                                       spad_array_size,
                                       start_select,
                                       current_spad_index,
@@ -3827,8 +3585,7 @@
 
             if (status == VL53L0X_ERROR_NONE) {
                 current_spad_index = last_spad_index;
-                status = perform_ref_signal_measurement(dev,
-                                                        &peak_signal_rate_ref);
+                status = perform_ref_signal_measurement(&peak_signal_rate_ref);
 
                 if ((status == VL53L0X_ERROR_NONE) &&
                         (peak_signal_rate_ref > target_ref_rate)) {
@@ -3849,7 +3606,7 @@
 
     if ((status == VL53L0X_ERROR_NONE) &&
             (peak_signal_rate_ref < target_ref_rate)) {
-        /* At this point, the minimum number of either aperture
+        /* At this point,the minimum number of either aperture
          * or non-aperture spads have been set. Proceed to add
          * spads and perform measurements until the target
          * reference is reached.
@@ -3857,16 +3614,15 @@
         is_aperture_spads_int = need_apt_spads;
         ref_spad_count_int	= minimum_spad_count;
 
-        memcpy(last_spad_array, dev->SpadData.RefSpadEnables,
+        memcpy(last_spad_array,_device->SpadData.RefSpadEnables,
                spad_array_size);
         last_signal_rate_diff = abs(peak_signal_rate_ref -
                                     target_ref_rate);
         complete = 0;
 
         while (!complete) {
-            get_next_good_spad(
-                dev->SpadData.RefGoodSpadMap,
-                spad_array_size, current_spad_index,
+            get_next_good_spad(_device->SpadData.RefGoodSpadMap,
+                spad_array_size,current_spad_index,
                 &next_good_spad);
 
             if (next_good_spad == -1) {
@@ -3874,7 +3630,7 @@
                 break;
             }
 
-            /* Cannot combine Aperture and Non-Aperture spads, so
+            /* Cannot combine Aperture and Non-Aperture spads,so
              * ensure the current spad is of the correct type.
              */
             if (is_aperture((uint32_t)start_select + next_good_spad) !=
@@ -3889,24 +3645,21 @@
             (ref_spad_count_int)++;
 
             current_spad_index = next_good_spad;
-            status = enable_spad_bit(
-                         dev->SpadData.RefSpadEnables,
-                         spad_array_size, current_spad_index);
+            status = enable_spad_bit(_device->SpadData.RefSpadEnables,
+                         spad_array_size,current_spad_index);
 
             if (status == VL53L0X_ERROR_NONE) {
                 current_spad_index++;
                 /* Proceed to apply the additional spad and
                  * perform measurement. */
-                status = set_ref_spad_map(dev,
-                                          dev->SpadData.RefSpadEnables);
+                status = set_ref_spad_map(_device->SpadData.RefSpadEnables);
             }
 
             if (status != VL53L0X_ERROR_NONE) {
                 break;
             }
 
-            status = perform_ref_signal_measurement(dev,
-                                                    &peak_signal_rate_ref);
+            status = perform_ref_signal_measurement(&peak_signal_rate_ref);
 
             if (status != VL53L0X_ERROR_NONE) {
                 break;
@@ -3921,12 +3674,10 @@
                  */
                 if (signal_rate_diff > last_signal_rate_diff) {
                     /* Previous spad map produced a closer
-                     * measurement, so choose this. */
-                    status = set_ref_spad_map(dev,
-                                              last_spad_array);
-                    memcpy(
-                        dev->SpadData.RefSpadEnables,
-                        last_spad_array, spad_array_size);
+                     * measurement,so choose this. */
+                    status = set_ref_spad_map(last_spad_array);
+                    memcpy(_device->SpadData.RefSpadEnables,
+                        last_spad_array,spad_array_size);
 
                     (ref_spad_count_int)--;
                 }
@@ -3935,7 +3686,7 @@
                 /* Continue to add spads */
                 last_signal_rate_diff = signal_rate_diff;
                 memcpy(last_spad_array,
-                       dev->SpadData.RefSpadEnables,
+                       _device->SpadData.RefSpadEnables,
                        spad_array_size);
             }
 
@@ -3946,18 +3697,15 @@
         *ref_spad_count = ref_spad_count_int;
         *is_aperture_spads = is_aperture_spads_int;
 
-        VL53L0X_SETDEVICESPECIFICPARAMETER(dev, RefSpadsInitialised, 1);
-        VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                           ReferenceSpadCount, (uint8_t)(*ref_spad_count));
-        VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                           ReferenceSpadType, *is_aperture_spads);
+        _device->DeviceSpecificParameters.RefSpadsInitialised = 1;
+        _device->DeviceSpecificParameters.ReferenceSpadCount = (uint8_t)(*ref_spad_count);
+        _device->DeviceSpecificParameters.ReferenceSpadType = *is_aperture_spads;
     }
 
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_set_reference_spads(VL53L0X_DEV dev,
-        uint32_t count, uint8_t is_aperture_spads)
+VL53L0X_Error VL53L0X::VL53L0X_set_reference_spads(uint32_t count,uint8_t is_aperture_spads)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint32_t current_spad_index = 0;
@@ -3968,36 +3716,33 @@
     uint32_t index;
 
     /*
-     * This function applies a requested number of reference spads, either
+     * This function applies a requested number of reference spads,either
      * aperture or
-     * non-aperture, as requested.
+     * non-aperture,as requested.
      * The good spad map will be applied.
      */
 
-    status = VL53L0X_write_byte(dev, 0xFF, 0x01);
+    status = VL53L0X_write_byte(0xFF,0x01);
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev,
-                                    VL53L0X_REG_DYNAMIC_SPAD_REF_EN_START_OFFSET, 0x00);
+        status = VL53L0X_write_byte(VL53L0X_REG_DYNAMIC_SPAD_REF_EN_START_OFFSET,0x00);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev,
-                                    VL53L0X_REG_DYNAMIC_SPAD_NUM_REQUESTED_REF_SPAD, 0x2C);
+        status = VL53L0X_write_byte(VL53L0X_REG_DYNAMIC_SPAD_NUM_REQUESTED_REF_SPAD,0x2C);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev, 0xFF, 0x00);
+        status = VL53L0X_write_byte(0xFF,0x00);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev,
-                                    VL53L0X_REG_GLOBAL_CONFIG_REF_EN_START_SELECT,
+        status = VL53L0X_write_byte(VL53L0X_REG_GLOBAL_CONFIG_REF_EN_START_SELECT,
                                     start_select);
     }
 
     for (index = 0; index < spad_array_size; index++) {
-        dev->SpadData.RefSpadEnables[index] = 0;
+        _device->SpadData.RefSpadEnables[index] = 0;
     }
 
     if (is_aperture_spads) {
@@ -4007,10 +3752,9 @@
             current_spad_index++;
         }
     }
-    status = enable_ref_spads(dev,
-                              is_aperture_spads,
-                              dev->SpadData.RefGoodSpadMap,
-                              dev->SpadData.RefSpadEnables,
+    status = enable_ref_spads(is_aperture_spads,
+                              _device->SpadData.RefGoodSpadMap,
+                              _device->SpadData.RefSpadEnables,
                               spad_array_size,
                               start_select,
                               current_spad_index,
@@ -4018,17 +3762,15 @@
                               &last_spad_index);
 
     if (status == VL53L0X_ERROR_NONE) {
-        VL53L0X_SETDEVICESPECIFICPARAMETER(dev, RefSpadsInitialised, 1);
-        VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                           ReferenceSpadCount, (uint8_t)(count));
-        VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                           ReferenceSpadType, is_aperture_spads);
+        _device->DeviceSpecificParameters.RefSpadsInitialised = 1;
+        _device->DeviceSpecificParameters.ReferenceSpadCount = (uint8_t)(count);
+        _device->DeviceSpecificParameters.ReferenceSpadType = is_aperture_spads;
     }
 
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_wait_device_booted(VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::VL53L0X_wait_device_booted()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NOT_IMPLEMENTED;
     
@@ -4039,26 +3781,25 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_perform_ref_calibration(VL53L0X_DEV dev, uint8_t *p_vhv_settings,
+VL53L0X_Error VL53L0X::VL53L0X_perform_ref_calibration(uint8_t *p_vhv_settings,
         uint8_t *p_phase_cal)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = VL53L0X_perform_ref_calibration(dev, p_vhv_settings,
-             p_phase_cal, 1);
+    status = VL53L0X_perform_ref_calibration(p_vhv_settings,
+             p_phase_cal,1);
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_perform_ref_spad_management(VL53L0X_DEV dev,
-        uint32_t *ref_spad_count, uint8_t *is_aperture_spads)
+VL53L0X_Error VL53L0X::VL53L0X_perform_ref_spad_management(uint32_t *ref_spad_count,uint8_t *is_aperture_spads)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = wrapped_VL53L0X_perform_ref_spad_management(dev, ref_spad_count,
+    status = wrapped_VL53L0X_perform_ref_spad_management(ref_spad_count,
              is_aperture_spads);
 
     
@@ -4067,20 +3808,20 @@
 }
 
 /* Group PAL Init Functions */
-VL53L0X_Error VL53L0X::VL53L0X_set_device_address(VL53L0X_DEV dev, uint8_t device_address)
+VL53L0X_Error VL53L0X::VL53L0X_set_device_address(uint8_t device_address)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = VL53L0X_write_byte(dev, VL53L0X_REG_I2C_SLAVE_DEVICE_ADDRESS,
+    status = VL53L0X_write_byte(VL53L0X_REG_I2C_SLAVE_DEVICE_ADDRESS,
                                 device_address / 2);
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_set_gpio_config(VL53L0X_DEV dev, uint8_t pin,
-        VL53L0X_DeviceModes device_mode, VL53L0X_GpioFunctionality functionality,
+VL53L0X_Error VL53L0X::VL53L0X_set_gpio_config(uint8_t pin,
+        VL53L0X_DeviceModes device_mode,VL53L0X_GpioFunctionality functionality,
         VL53L0X_InterruptPolarity polarity)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -4097,32 +3838,31 @@
             data = 1;
         }
 
-        status = VL53L0X_write_byte(dev,
-                                    VL53L0X_REG_GPIO_HV_MUX_ACTIVE_HIGH, data);
+        status = VL53L0X_write_byte(VL53L0X_REG_GPIO_HV_MUX_ACTIVE_HIGH,data);
 
     } else {
         if (device_mode == VL53L0X_DEVICEMODE_GPIO_OSC) {
 
-            status |= VL53L0X_write_byte(dev, 0xff, 0x01);
-            status |= VL53L0X_write_byte(dev, 0x00, 0x00);
-
-            status |= VL53L0X_write_byte(dev, 0xff, 0x00);
-            status |= VL53L0X_write_byte(dev, 0x80, 0x01);
-            status |= VL53L0X_write_byte(dev, 0x85, 0x02);
-
-            status |= VL53L0X_write_byte(dev, 0xff, 0x04);
-            status |= VL53L0X_write_byte(dev, 0xcd, 0x00);
-            status |= VL53L0X_write_byte(dev, 0xcc, 0x11);
-
-            status |= VL53L0X_write_byte(dev, 0xff, 0x07);
-            status |= VL53L0X_write_byte(dev, 0xbe, 0x00);
-
-            status |= VL53L0X_write_byte(dev, 0xff, 0x06);
-            status |= VL53L0X_write_byte(dev, 0xcc, 0x09);
-
-            status |= VL53L0X_write_byte(dev, 0xff, 0x00);
-            status |= VL53L0X_write_byte(dev, 0xff, 0x01);
-            status |= VL53L0X_write_byte(dev, 0x00, 0x00);
+            status |= VL53L0X_write_byte(0xff,0x01);
+            status |= VL53L0X_write_byte(0x00,0x00);
+
+            status |= VL53L0X_write_byte(0xff,0x00);
+            status |= VL53L0X_write_byte(0x80,0x01);
+            status |= VL53L0X_write_byte(0x85,0x02);
+
+            status |= VL53L0X_write_byte(0xff,0x04);
+            status |= VL53L0X_write_byte(0xcd,0x00);
+            status |= VL53L0X_write_byte(0xcc,0x11);
+
+            status |= VL53L0X_write_byte(0xff,0x07);
+            status |= VL53L0X_write_byte(0xbe,0x00);
+
+            status |= VL53L0X_write_byte(0xff,0x06);
+            status |= VL53L0X_write_byte(0xcc,0x09);
+
+            status |= VL53L0X_write_byte(0xff,0x00);
+            status |= VL53L0X_write_byte(0xff,0x01);
+            status |= VL53L0X_write_byte(0x00,0x00);
 
         } else {
 
@@ -4150,8 +3890,7 @@
             }
 
             if (status == VL53L0X_ERROR_NONE) {
-                status = VL53L0X_write_byte(dev,
-                                            VL53L0X_REG_SYSTEM_INTERRUPT_CONFIG_GPIO, data);
+                status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_INTERRUPT_CONFIG_GPIO,data);
             }
 
             if (status == VL53L0X_ERROR_NONE) {
@@ -4160,17 +3899,15 @@
                 } else {
                     data = (uint8_t)(1 << 4);
                 }
-                status = VL53L0X_update_byte(dev,
-                                             VL53L0X_REG_GPIO_HV_MUX_ACTIVE_HIGH, 0xEF, data);
+                status = VL53L0X_update_byte(VL53L0X_REG_GPIO_HV_MUX_ACTIVE_HIGH,0xEF,data);
             }
 
             if (status == VL53L0X_ERROR_NONE) {
-                VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                                   Pin0GpioFunctionality, functionality);
+                _device->DeviceSpecificParameters.Pin0GpioFunctionality = functionality;
             }
 
             if (status == VL53L0X_ERROR_NONE) {
-                status = VL53L0X_clear_interrupt_mask(dev, 0);
+                status = VL53L0X_clear_interrupt_mask(0);
             }
         }
     }
@@ -4178,12 +3915,12 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_fraction_enable(VL53L0X_DEV dev, uint8_t *p_enabled)
+VL53L0X_Error VL53L0X::VL53L0X_get_fraction_enable(uint8_t *p_enabled)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = VL53L0X_read_byte(dev, VL53L0X_REG_SYSTEM_RANGE_CONFIG, p_enabled);
+    status = VL53L0X_read_byte(VL53L0X_REG_SYSTEM_RANGE_CONFIG,p_enabled);
 
     if (status == VL53L0X_ERROR_NONE) {
         *p_enabled = (*p_enabled & 1);
@@ -4219,8 +3956,7 @@
 
 }
 
-VL53L0X_Error VL53L0X::set_sequence_step_timeout(VL53L0X_DEV dev,
-        VL53L0X_SequenceStepId sequence_step_id,
+VL53L0X_Error VL53L0X::set_sequence_step_timeout(VL53L0X_SequenceStepId sequence_step_id,
         uint32_t timeout_micro_secs)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -4237,13 +3973,11 @@
             (sequence_step_id == VL53L0X_SEQUENCESTEP_DSS)	 ||
             (sequence_step_id == VL53L0X_SEQUENCESTEP_MSRC)) {
 
-        status = VL53L0X_get_vcsel_pulse_period(dev,
-                                                VL53L0X_VCSEL_PERIOD_PRE_RANGE,
+        status = VL53L0X_get_vcsel_pulse_period(VL53L0X_VCSEL_PERIOD_PRE_RANGE,
                                                 &current_vcsel_pulse_period_p_clk);
 
         if (status == VL53L0X_ERROR_NONE) {
-            msrc_range_time_out_m_clks = VL53L0X_calc_timeout_mclks(dev,
-                                         timeout_micro_secs,
+            msrc_range_time_out_m_clks = VL53L0X_calc_timeout_mclks(timeout_micro_secs,
                                          (uint8_t)current_vcsel_pulse_period_p_clk);
 
             if (msrc_range_time_out_m_clks > 256) {
@@ -4253,14 +3987,11 @@
                     (uint8_t)msrc_range_time_out_m_clks - 1;
             }
 
-            VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                               LastEncodedTimeout,
-                                               msrc_encoded_time_out);
+            _device->DeviceSpecificParameters.LastEncodedTimeout = msrc_encoded_time_out;
         }
 
         if (status == VL53L0X_ERROR_NONE) {
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_MSRC_CONFIG_TIMEOUT_MACROP,
+            status = VL53L0X_write_byte(VL53L0X_REG_MSRC_CONFIG_TIMEOUT_MACROP,
                                         msrc_encoded_time_out);
         }
     } else {
@@ -4268,59 +3999,47 @@
         if (sequence_step_id == VL53L0X_SEQUENCESTEP_PRE_RANGE) {
 
             if (status == VL53L0X_ERROR_NONE) {
-                status = VL53L0X_get_vcsel_pulse_period(dev,
-                                                        VL53L0X_VCSEL_PERIOD_PRE_RANGE,
+                status = VL53L0X_get_vcsel_pulse_period(VL53L0X_VCSEL_PERIOD_PRE_RANGE,
                                                         &current_vcsel_pulse_period_p_clk);
                 pre_range_time_out_m_clks =
-                    VL53L0X_calc_timeout_mclks(dev,
-                                               timeout_micro_secs,
+                    VL53L0X_calc_timeout_mclks(timeout_micro_secs,
                                                (uint8_t)current_vcsel_pulse_period_p_clk);
-                pre_range_encoded_time_out = VL53L0X_encode_timeout(
-                                                 pre_range_time_out_m_clks);
-
-                VL53L0X_SETDEVICESPECIFICPARAMETER(dev,
-                                                   LastEncodedTimeout,
-                                                   pre_range_encoded_time_out);
+                pre_range_encoded_time_out = VL53L0X_encode_timeout(pre_range_time_out_m_clks);
+
+                _device->DeviceSpecificParameters.LastEncodedTimeout = pre_range_encoded_time_out;
             }
 
             if (status == VL53L0X_ERROR_NONE) {
-                status = VL53L0X_write_word(dev,
-                                            VL53L0X_REG_PRE_RANGE_CONFIG_TIMEOUT_MACROP_HI,
+                status = VL53L0X_write_word(VL53L0X_REG_PRE_RANGE_CONFIG_TIMEOUT_MACROP_HI,
                                             pre_range_encoded_time_out);
             }
 
             if (status == VL53L0X_ERROR_NONE) {
-                VL53L0X_SETDEVICESPECIFICPARAMETER(
-                    dev,
-                    PreRangeTimeoutMicroSecs,
-                    timeout_micro_secs);
+                _device->DeviceSpecificParameters.PreRangeTimeoutMicroSecs=timeout_micro_secs;
             }
         } else if (sequence_step_id == VL53L0X_SEQUENCESTEP_FINAL_RANGE) {
 
-            /* For the final range timeout, the pre-range timeout
+            /* For the final range timeout,the pre-range timeout
              * must be added. To do this both final and pre-range
              * timeouts must be expressed in macro periods MClks
              * because they have different vcsel periods.
              */
 
-            VL53L0X_get_sequence_step_enables(dev,
-                                              &scheduler_sequence_steps);
+            VL53L0X_get_sequence_step_enables(&scheduler_sequence_steps);
             pre_range_time_out_m_clks = 0;
             if (scheduler_sequence_steps.PreRangeOn) {
 
                 /* Retrieve PRE-RANGE VCSEL Period */
-                status = VL53L0X_get_vcsel_pulse_period(dev,
-                                                        VL53L0X_VCSEL_PERIOD_PRE_RANGE,
+                status = VL53L0X_get_vcsel_pulse_period(VL53L0X_VCSEL_PERIOD_PRE_RANGE,
                                                         &current_vcsel_pulse_period_p_clk);
 
                 /* Retrieve PRE-RANGE Timeout in Macro periods
                  * (MCLKS) */
                 if (status == VL53L0X_ERROR_NONE) {
-                    status = VL53L0X_read_word(dev, 0x51,
+                    status = VL53L0X_read_word(0x51,
                                                &pre_range_encoded_time_out);
                     pre_range_time_out_m_clks =
-                        VL53L0X_decode_timeout(
-                            pre_range_encoded_time_out);
+                        VL53L0X_decode_timeout(pre_range_encoded_time_out);
                 }
             }
 
@@ -4328,14 +4047,12 @@
              * (MCLKS) and add PRE-RANGE value
              */
             if (status == VL53L0X_ERROR_NONE) {
-                status = VL53L0X_get_vcsel_pulse_period(dev,
-                                                        VL53L0X_VCSEL_PERIOD_FINAL_RANGE,
+                status = VL53L0X_get_vcsel_pulse_period(VL53L0X_VCSEL_PERIOD_FINAL_RANGE,
                                                         &current_vcsel_pulse_period_p_clk);
             }
             if (status == VL53L0X_ERROR_NONE) {
                 final_range_time_out_m_clks =
-                    VL53L0X_calc_timeout_mclks(dev,
-                                               timeout_micro_secs,
+                    VL53L0X_calc_timeout_mclks(timeout_micro_secs,
                                                (uint8_t) current_vcsel_pulse_period_p_clk);
 
                 final_range_time_out_m_clks += pre_range_time_out_m_clks;
@@ -4344,15 +4061,12 @@
                     VL53L0X_encode_timeout(final_range_time_out_m_clks);
 
                 if (status == VL53L0X_ERROR_NONE) {
-                    status = VL53L0X_write_word(dev, 0x71,
+                    status = VL53L0X_write_word(0x71,
                                                 final_range_encoded_time_out);
                 }
 
                 if (status == VL53L0X_ERROR_NONE) {
-                    VL53L0X_SETDEVICESPECIFICPARAMETER(
-                        dev,
-                        FinalRangeTimeoutMicroSecs,
-                        timeout_micro_secs);
+                    _device->DeviceSpecificParameters.FinalRangeTimeoutMicroSecs = timeout_micro_secs;
                 }
             }
         } else {
@@ -4363,8 +4077,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::wrapped_VL53L0X_set_measurement_timing_budget_micro_seconds(VL53L0X_DEV dev,
-        uint32_t measurement_timing_budget_micro_seconds)
+VL53L0X_Error VL53L0X::wrapped_VL53L0X_set_measurement_timing_budget_micro_seconds(uint32_t measurement_timing_budget_micro_seconds)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint32_t final_range_timing_budget_micro_seconds;
@@ -4393,19 +4106,18 @@
         measurement_timing_budget_micro_seconds -
         (start_overhead_micro_seconds + end_overhead_micro_seconds);
 
-    status = VL53L0X_get_sequence_step_enables(dev, &scheduler_sequence_steps);
+    status = VL53L0X_get_sequence_step_enables(&scheduler_sequence_steps);
 
     if (status == VL53L0X_ERROR_NONE &&
             (scheduler_sequence_steps.TccOn  ||
              scheduler_sequence_steps.MsrcOn ||
              scheduler_sequence_steps.DssOn)) {
 
-        /* TCC, MSRC and DSS all share the same timeout */
-        status = get_sequence_step_timeout(dev,
-                                           VL53L0X_SEQUENCESTEP_MSRC,
+        /* TCC,MSRC and DSS all share the same timeout */
+        status = get_sequence_step_timeout(VL53L0X_SEQUENCESTEP_MSRC,
                                            &msrc_dcc_tcc_timeout_micro_seconds);
 
-        /* Subtract the TCC, MSRC and DSS timeouts if they are
+        /* Subtract the TCC,MSRC and DSS timeouts if they are
          * enabled. */
 
         if (status != VL53L0X_ERROR_NONE) {
@@ -4471,8 +4183,7 @@
 
         /* Subtract the Pre-range timeout if enabled. */
 
-        status = get_sequence_step_timeout(dev,
-                                           VL53L0X_SEQUENCESTEP_PRE_RANGE,
+        status = get_sequence_step_timeout(VL53L0X_SEQUENCESTEP_PRE_RANGE,
                                            &pre_range_timeout_micro_seconds);
 
         sub_timeout = pre_range_timeout_micro_seconds +
@@ -4496,17 +4207,14 @@
         /* Final Range Timeout
          * Note that the final range timeout is determined by the timing
          * budget and the sum of all other timeouts within the sequence.
-         * If there is no room for the final range timeout, then an error
+         * If there is no room for the final range timeout,then an error
          * will be set. Otherwise the remaining time will be applied to
          * the final range.
          */
-        status = set_sequence_step_timeout(dev,
-                                           VL53L0X_SEQUENCESTEP_FINAL_RANGE,
+        status = set_sequence_step_timeout(VL53L0X_SEQUENCESTEP_FINAL_RANGE,
                                            final_range_timing_budget_micro_seconds);
 
-        VL53L0X_SETPARAMETERFIELD(dev,
-                                  MeasurementTimingBudgetMicroSeconds,
-                                  measurement_timing_budget_micro_seconds);
+        _device->CurrentParameters.MeasurementTimingBudgetMicroSeconds = measurement_timing_budget_micro_seconds; 
     }
 
     
@@ -4514,22 +4222,17 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_set_measurement_timing_budget_micro_seconds(VL53L0X_DEV dev,
-        uint32_t measurement_timing_budget_micro_seconds)
+VL53L0X_Error VL53L0X::VL53L0X_set_measurement_timing_budget_micro_seconds(uint32_t measurement_timing_budget_micro_seconds)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = wrapped_VL53L0X_set_measurement_timing_budget_micro_seconds(dev,
-             measurement_timing_budget_micro_seconds);
-
-    
+    status = wrapped_VL53L0X_set_measurement_timing_budget_micro_seconds(measurement_timing_budget_micro_seconds);
 
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_set_sequence_step_enable(VL53L0X_DEV dev,
-        VL53L0X_SequenceStepId sequence_step_id, uint8_t sequence_step_enabled)
+VL53L0X_Error VL53L0X::VL53L0X_set_sequence_step_enable(VL53L0X_SequenceStepId sequence_step_id,uint8_t sequence_step_enabled)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t sequence_config = 0;
@@ -4537,7 +4240,7 @@
     uint32_t measurement_timing_budget_micro_seconds;
     
 
-    status = VL53L0X_read_byte(dev, VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
+    status = VL53L0X_read_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,
                                &sequence_config);
 
     sequence_config_new = sequence_config;
@@ -4594,22 +4297,18 @@
     if (sequence_config_new != sequence_config) {
         /* Apply New Setting */
         if (status == VL53L0X_ERROR_NONE) {
-            status = VL53L0X_write_byte(dev,
-                                        VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG, sequence_config_new);
+            status = VL53L0X_write_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,sequence_config_new);
         }
         if (status == VL53L0X_ERROR_NONE) {
-            PALDevDataSet(dev, SequenceConfig, sequence_config_new);
+            _device->SequenceConfig = sequence_config_new; 
         }
 
 
         /* Recalculate timing budget */
         if (status == VL53L0X_ERROR_NONE) {
-            VL53L0X_GETPARAMETERFIELD(dev,
-                                      MeasurementTimingBudgetMicroSeconds,
-                                      measurement_timing_budget_micro_seconds);
-
-            VL53L0X_set_measurement_timing_budget_micro_seconds(dev,
-                    measurement_timing_budget_micro_seconds);
+            measurement_timing_budget_micro_seconds = _device->CurrentParameters.MeasurementTimingBudgetMicroSeconds; 
+
+            VL53L0X_set_measurement_timing_budget_micro_seconds(measurement_timing_budget_micro_seconds);
         }
     }
 
@@ -4618,7 +4317,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_set_limit_check_enable(VL53L0X_DEV dev, uint16_t limit_check_id,
+VL53L0X_Error VL53L0X::VL53L0X_set_limit_check_enable(uint16_t limit_check_id,
         uint8_t limit_check_enable)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
@@ -4638,8 +4337,7 @@
             limit_check_disable = 1;
 
         } else {
-            VL53L0X_GETARRAYPARAMETERFIELD(dev, LimitChecksValue,
-                                           limit_check_id, temp_fix1616);
+            temp_fix1616 = _device->CurrentParameters.LimitChecksValue[limit_check_id];
             limit_check_disable = 0;
             /* this to be sure to have either 0 or 1 */
             limit_check_enable_int = 1;
@@ -4649,16 +4347,13 @@
 
             case VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE:
                 /* internal computation: */
-                VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksEnable,
-                                               VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE,
-                                               limit_check_enable_int);
+                 _device->CurrentParameters.LimitChecksEnable[VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE] = limit_check_enable_int; 
 
                 break;
 
             case VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE:
 
-                status = VL53L0X_write_word(dev,
-                                            VL53L0X_REG_FINAL_RANGE_CONFIG_MIN_COUNT_RATE_RTN_LIMIT,
+                status = VL53L0X_write_word(VL53L0X_REG_FINAL_RANGE_CONFIG_MIN_COUNT_RATE_RTN_LIMIT,
                                             VL53L0X_FIXPOINT1616TOFIXPOINT97(temp_fix1616));
 
                 break;
@@ -4666,36 +4361,30 @@
             case VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP:
 
                 /* internal computation: */
-                VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksEnable,
-                                               VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP,
-                                               limit_check_enable_int);
+                 _device->CurrentParameters.LimitChecksEnable[VL53L0X_CHECKENABLE_SIGNAL_REF_CLIP] = limit_check_enable_int; 
 
                 break;
 
             case VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD:
 
                 /* internal computation: */
-                VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksEnable,
-                                               VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD,
-                                               limit_check_enable_int);
+                 _device->CurrentParameters.LimitChecksEnable[VL53L0X_CHECKENABLE_RANGE_IGNORE_THRESHOLD] = limit_check_enable_int; 
 
                 break;
 
             case VL53L0X_CHECKENABLE_SIGNAL_RATE_MSRC:
 
                 temp8 = (uint8_t)(limit_check_disable << 1);
-                status = VL53L0X_update_byte(dev,
-                                             VL53L0X_REG_MSRC_CONFIG_CONTROL,
-                                             0xFE, temp8);
+                status = VL53L0X_update_byte(VL53L0X_REG_MSRC_CONFIG_CONTROL,
+                                             0xFE,temp8);
 
                 break;
 
             case VL53L0X_CHECKENABLE_SIGNAL_RATE_PRE_RANGE:
 
                 temp8 = (uint8_t)(limit_check_disable << 4);
-                status = VL53L0X_update_byte(dev,
-                                             VL53L0X_REG_MSRC_CONFIG_CONTROL,
-                                             0xEF, temp8);
+                status = VL53L0X_update_byte(VL53L0X_REG_MSRC_CONFIG_CONTROL,
+                                             0xEF,temp8);
 
                 break;
 
@@ -4709,11 +4398,9 @@
 
     if (status == VL53L0X_ERROR_NONE) {
         if (limit_check_enable == 0) {
-            VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksEnable,
-                                           limit_check_id, 0);
+             _device->CurrentParameters.LimitChecksEnable[limit_check_id] = 0; 
         } else {
-            VL53L0X_SETARRAYPARAMETERFIELD(dev, LimitChecksEnable,
-                                           limit_check_id, 1);
+             _device->CurrentParameters.LimitChecksEnable[limit_check_id] = 1; 
         }
     }
 
@@ -4721,7 +4408,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_static_init(VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::VL53L0X_static_init()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     VL53L0X_DeviceParameters_t current_parameters = {0};
@@ -4738,22 +4425,20 @@
 
     
 
-    status = VL53L0X_get_info_from_device(dev, 1);
+    status = VL53L0X_get_info_from_device(1);
 
     /* set the ref spad from NVM */
-    count	= (uint32_t)VL53L0X_GETDEVICESPECIFICPARAMETER(dev,
-              ReferenceSpadCount);
-    aperture_spads = VL53L0X_GETDEVICESPECIFICPARAMETER(dev,
-                     ReferenceSpadType);
+    count	= (uint32_t)_device->DeviceSpecificParameters.ReferenceSpadCount; 
+    aperture_spads = _device->DeviceSpecificParameters.ReferenceSpadType; 
 
     /* NVM value invalid */
     if ((aperture_spads > 1) ||
             ((aperture_spads == 1) && (count > 32)) ||
             ((aperture_spads == 0) && (count > 12))) {
-        status = wrapped_VL53L0X_perform_ref_spad_management(dev, &ref_spad_count,
+        status = wrapped_VL53L0X_perform_ref_spad_management(&ref_spad_count,
                  &is_aperture_spads);
     } else {
-        status = VL53L0X_set_reference_spads(dev, count, aperture_spads);
+        status = VL53L0X_set_reference_spads(count,aperture_spads);
     }
 
 
@@ -4761,12 +4446,10 @@
     p_tuning_setting_buffer = DefaultTuningSettings;
 
     if (status == VL53L0X_ERROR_NONE) {
-        use_internal_tuning_settings = PALDevDataGet(dev,
-                                       UseInternalTuningSettings);
+        use_internal_tuning_settings = _device->UseInternalTuningSettings;
 
         if (use_internal_tuning_settings == 0) {
-            p_tuning_setting_buffer = PALDevDataGet(dev,
-                                                    pTuningSettingsPointer);
+            p_tuning_setting_buffer = _device->pTuningSettingsPointer;
         } else {
             p_tuning_setting_buffer = DefaultTuningSettings;
         }
@@ -4774,131 +4457,112 @@
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_load_tuning_settings(dev, p_tuning_setting_buffer);
+        status = VL53L0X_load_tuning_settings(p_tuning_setting_buffer);
     }
 
 
     /* Set interrupt config to new sample ready */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_set_gpio_config(dev, 0, 0,
+        status = VL53L0X_set_gpio_config(0,0,
                                          VL53L0X_REG_SYSTEM_INTERRUPT_GPIO_NEW_SAMPLE_READY,
                                          VL53L0X_INTERRUPTPOLARITY_LOW);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev, 0xFF, 0x01);
-        status |= VL53L0X_read_word(dev, 0x84, &tempword);
-        status |= VL53L0X_write_byte(dev, 0xFF, 0x00);
+        status = VL53L0X_write_byte(0xFF,0x01);
+        status |= VL53L0X_read_word(0x84,&tempword);
+        status |= VL53L0X_write_byte(0xFF,0x00);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        VL53L0X_SETDEVICESPECIFICPARAMETER(dev, OscFrequencyMHz,
-                                           VL53L0X_FIXPOINT412TOFIXPOINT1616(tempword));
-    }
-
-    /* After static init, some device parameters may be changed,
+        _device->DeviceSpecificParameters.OscFrequencyMHz=
+            VL53L0X_FIXPOINT412TOFIXPOINT1616(tempword);
+    }
+
+    /* After static init,some device parameters may be changed,
      * so update them */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_get_device_parameters(dev, &current_parameters);
+        status = VL53L0X_get_device_parameters(&current_parameters);
     }
 
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_get_fraction_enable(dev, &tempbyte);
+        status = VL53L0X_get_fraction_enable(&tempbyte);
         if (status == VL53L0X_ERROR_NONE) {
-            PALDevDataSet(dev, RangeFractionalEnable, tempbyte);
+            _device->RangeFractionalEnable = tempbyte; 
         }
 
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        PALDevDataSet(dev, CurrentParameters, current_parameters);
+        _device->CurrentParameters = current_parameters; 
     }
 
 
     /* read the sequence config and save it */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_read_byte(dev,
-                                   VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG, &tempbyte);
+        status = VL53L0X_read_byte(VL53L0X_REG_SYSTEM_SEQUENCE_CONFIG,&tempbyte);
         if (status == VL53L0X_ERROR_NONE) {
-            PALDevDataSet(dev, SequenceConfig, tempbyte);
+            _device->SequenceConfig = tempbyte; 
         }
     }
 
     /* Disable MSRC and TCC by default */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_set_sequence_step_enable(dev,
-                 VL53L0X_SEQUENCESTEP_TCC, 0);
+        status = VL53L0X_set_sequence_step_enable(VL53L0X_SEQUENCESTEP_TCC,0);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_set_sequence_step_enable(dev,
-                 VL53L0X_SEQUENCESTEP_MSRC, 0);
+        status = VL53L0X_set_sequence_step_enable(VL53L0X_SEQUENCESTEP_MSRC,0);
     }
 
     /* Set PAL State to standby */
     if (status == VL53L0X_ERROR_NONE) {
-        PALDevDataSet(dev, PalState, VL53L0X_STATE_IDLE);
+        _device->PalState = VL53L0X_STATE_IDLE; 
     }
 
     /* Store pre-range vcsel period */
     if (status == VL53L0X_ERROR_NONE) {
         status = VL53L0X_get_vcsel_pulse_period(
-                     dev,
                      VL53L0X_VCSEL_PERIOD_PRE_RANGE,
                      &vcsel_pulse_period_pclk);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        VL53L0X_SETDEVICESPECIFICPARAMETER(
-            dev,
-            PreRangeVcselPulsePeriod,
-            vcsel_pulse_period_pclk);
+        _device->DeviceSpecificParameters.PreRangeVcselPulsePeriod = vcsel_pulse_period_pclk;
     }
 
     /* Store final-range vcsel period */
     if (status == VL53L0X_ERROR_NONE) {
         status = VL53L0X_get_vcsel_pulse_period(
-                     dev,
                      VL53L0X_VCSEL_PERIOD_FINAL_RANGE,
                      &vcsel_pulse_period_pclk);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        VL53L0X_SETDEVICESPECIFICPARAMETER(
-            dev,
-            FinalRangeVcselPulsePeriod,
-            vcsel_pulse_period_pclk);
+        _device->DeviceSpecificParameters.FinalRangeVcselPulsePeriod = vcsel_pulse_period_pclk;
     }
 
     /* Store pre-range timeout */
     if (status == VL53L0X_ERROR_NONE) {
         status = get_sequence_step_timeout(
-                     dev,
                      VL53L0X_SEQUENCESTEP_PRE_RANGE,
                      &seq_timeout_micro_secs);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        VL53L0X_SETDEVICESPECIFICPARAMETER(
-            dev,
-            PreRangeTimeoutMicroSecs,
-            seq_timeout_micro_secs);
+        _device->DeviceSpecificParameters.PreRangeTimeoutMicroSecs = seq_timeout_micro_secs;
     }
 
     /* Store final-range timeout */
     if (status == VL53L0X_ERROR_NONE) {
         status = get_sequence_step_timeout(
-                     dev,
                      VL53L0X_SEQUENCESTEP_FINAL_RANGE,
                      &seq_timeout_micro_secs);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        VL53L0X_SETDEVICESPECIFICPARAMETER(
-            dev,
-            FinalRangeTimeoutMicroSecs,
-            seq_timeout_micro_secs);
+        _device->DeviceSpecificParameters.FinalRangeTimeoutMicroSecs = seq_timeout_micro_secs;
     }
 
     
@@ -4906,62 +4570,60 @@
 }
 
 
-VL53L0X_Error VL53L0X::VL53L0X_stop_measurement(VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::VL53L0X_stop_measurement()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     
 
-    status = VL53L0X_write_byte(dev, VL53L0X_REG_SYSRANGE_START,
+    status = VL53L0X_write_byte(VL53L0X_REG_SYSRANGE_START,
                                 VL53L0X_REG_SYSRANGE_MODE_SINGLESHOT);
 
-    status = VL53L0X_write_byte(dev, 0xFF, 0x01);
-    status = VL53L0X_write_byte(dev, 0x00, 0x00);
-    status = VL53L0X_write_byte(dev, 0x91, 0x00);
-    status = VL53L0X_write_byte(dev, 0x00, 0x01);
-    status = VL53L0X_write_byte(dev, 0xFF, 0x00);
+    status = VL53L0X_write_byte(0xFF,0x01);
+    status = VL53L0X_write_byte(0x00,0x00);
+    status = VL53L0X_write_byte(0x91,0x00);
+    status = VL53L0X_write_byte(0x00,0x01);
+    status = VL53L0X_write_byte(0xFF,0x00);
 
     if (status == VL53L0X_ERROR_NONE) {
         /* Set PAL State to Idle */
-        PALDevDataSet(dev, PalState, VL53L0X_STATE_IDLE);
+        _device->PalState = VL53L0X_STATE_IDLE; 
     }
 
     /* Check if need to apply interrupt settings */
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_check_and_load_interrupt_settings(dev, 0);
+        status = VL53L0X_check_and_load_interrupt_settings(0);
     }
 
     
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_get_stop_completed_status(VL53L0X_DEV dev,
-        uint32_t *p_stop_status)
+VL53L0X_Error VL53L0X::VL53L0X_get_stop_completed_status(uint32_t *p_stop_status)
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t byte = 0;
     
 
-    status = VL53L0X_write_byte(dev, 0xFF, 0x01);
+    status = VL53L0X_write_byte(0xFF,0x01);
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_read_byte(dev, 0x04, &byte);
+        status = VL53L0X_read_byte(0x04,&byte);
     }
 
     if (status == VL53L0X_ERROR_NONE) {
-        status = VL53L0X_write_byte(dev, 0xFF, 0x0);
+        status = VL53L0X_write_byte(0xFF,0x0);
     }
 
     *p_stop_status = byte;
 
     if (byte == 0) {
-        status = VL53L0X_write_byte(dev, 0x80, 0x01);
-        status = VL53L0X_write_byte(dev, 0xFF, 0x01);
-        status = VL53L0X_write_byte(dev, 0x00, 0x00);
-        status = VL53L0X_write_byte(dev, 0x91,
-                                    PALDevDataGet(dev, StopVariable));
-        status = VL53L0X_write_byte(dev, 0x00, 0x01);
-        status = VL53L0X_write_byte(dev, 0xFF, 0x00);
-        status = VL53L0X_write_byte(dev, 0x80, 0x00);
+        status = VL53L0X_write_byte(0x80,0x01);
+        status = VL53L0X_write_byte(0xFF,0x01);
+        status = VL53L0X_write_byte(0x00,0x00);
+        status = VL53L0X_write_byte(0x91,_device->StopVariable);
+        status = VL53L0X_write_byte(0x00,0x01);
+        status = VL53L0X_write_byte(0xFF,0x00);
+        status = VL53L0X_write_byte(0x80,0x00);
     }
 
     
@@ -4970,15 +4632,15 @@
 
 /****************** Write and read functions from I2C *************************/
 
-VL53L0X_Error VL53L0X::VL53L0X_write_multi(VL53L0X_DEV dev, uint8_t index, uint8_t *p_data, uint32_t count)
+VL53L0X_Error VL53L0X::VL53L0X_write_multi(uint8_t index,uint8_t *p_data,uint32_t count)
 {
     int  status;
 
-    status = VL53L0X_i2c_write(dev->I2cDevAddr, index, p_data, (uint16_t)count);
+    status = VL53L0X_i2c_write(index,p_data,(uint16_t)count);
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_read_multi(VL53L0X_DEV dev, uint8_t index, uint8_t *p_data, uint32_t count)
+VL53L0X_Error VL53L0X::VL53L0X_read_multi(uint8_t index,uint8_t *p_data,uint32_t count)
 {
     int status;
 
@@ -4986,32 +4648,32 @@
         status = VL53L0X_ERROR_INVALID_PARAMS;
     }
 
-    status = VL53L0X_i2c_read(dev->I2cDevAddr, index, p_data, (uint16_t)count);
+    status = VL53L0X_i2c_read(index,p_data,(uint16_t)count);
 
     return status;
 }
 
 
-VL53L0X_Error VL53L0X::VL53L0X_write_byte(VL53L0X_DEV Dev, uint8_t index, uint8_t data)
+VL53L0X_Error VL53L0X::VL53L0X_write_byte(uint8_t index,uint8_t data)
 {
     int  status;
 
-    status = VL53L0X_i2c_write(Dev->I2cDevAddr, index, &data, 1);
+    status = VL53L0X_i2c_write(index,&data,1);
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_write_word(VL53L0X_DEV dev, uint8_t index, uint16_t data)
+VL53L0X_Error VL53L0X::VL53L0X_write_word(uint8_t index,uint16_t data)
 {
     int  status;
     uint8_t buffer[2];
 
     buffer[0] = data >> 8;
     buffer[1] = data & 0x00FF;
-    status = VL53L0X_i2c_write(dev->I2cDevAddr, index, (uint8_t *)buffer, 2);
+    status = VL53L0X_i2c_write(index,(uint8_t *)buffer,2);
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_write_dword(VL53L0X_DEV Dev, uint8_t index, uint32_t data)
+VL53L0X_Error VL53L0X::VL53L0X_write_dword(uint8_t index,uint32_t data)
 {
     int  status;
     uint8_t buffer[4];
@@ -5020,16 +4682,16 @@
     buffer[1] = (data >> 16) & 0xFF;
     buffer[2] = (data >>  8) & 0xFF;
     buffer[3] = (data >>  0) & 0xFF;
-    status = VL53L0X_i2c_write(Dev->I2cDevAddr, index, (uint8_t *)buffer, 4);
+    status = VL53L0X_i2c_write(index,(uint8_t *)buffer,4);
     return status;
 }
 
 
-VL53L0X_Error VL53L0X::VL53L0X_read_byte(VL53L0X_DEV Dev, uint8_t index, uint8_t *p_data)
+VL53L0X_Error VL53L0X::VL53L0X_read_byte(uint8_t index,uint8_t *p_data)
 {
     int  status;
 
-    status = VL53L0X_i2c_read(Dev->I2cDevAddr, index, p_data, 1);
+    status = VL53L0X_i2c_read(index,p_data,1);
 
     if (status) {
         return -1;
@@ -5038,12 +4700,12 @@
     return 0;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_read_word(VL53L0X_DEV Dev, uint8_t index, uint16_t *p_data)
+VL53L0X_Error VL53L0X::VL53L0X_read_word(uint8_t index,uint16_t *p_data)
 {
     int  status;
-    uint8_t buffer[2] = {0, 0};
-
-    status = VL53L0X_i2c_read(Dev->I2cDevAddr, index, buffer, 2);
+    uint8_t buffer[2] = {0,0};
+
+    status = VL53L0X_i2c_read(index,buffer,2);
     if (!status) {
         *p_data = (buffer[0] << 8) + buffer[1];
     }
@@ -5051,12 +4713,12 @@
 
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_read_dword(VL53L0X_DEV Dev, uint8_t index, uint32_t *p_data)
+VL53L0X_Error VL53L0X::VL53L0X_read_dword(uint8_t index,uint32_t *p_data)
 {
     int status;
-    uint8_t buffer[4] = {0, 0, 0, 0};
-
-    status = VL53L0X_i2c_read(Dev->I2cDevAddr, index, buffer, 4);
+    uint8_t buffer[4] = {0,0,0,0};
+
+    status = VL53L0X_i2c_read(index,buffer,4);
     if (!status) {
         *p_data = (buffer[0] << 24) + (buffer[1] << 16) + (buffer[2] << 8) + buffer[3];
     }
@@ -5064,26 +4726,26 @@
 
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_update_byte(VL53L0X_DEV Dev, uint8_t index, uint8_t and_data, uint8_t or_data)
+VL53L0X_Error VL53L0X::VL53L0X_update_byte(uint8_t index,uint8_t and_data,uint8_t or_data)
 {
     int  status;
     uint8_t buffer = 0;
 
     /* read data direct onto buffer */
-    status = VL53L0X_i2c_read(Dev->I2cDevAddr, index, &buffer, 1);
+    status = VL53L0X_i2c_read(index,&buffer,1);
     if (!status) {
         buffer = (buffer & and_data) | or_data;
-        status = VL53L0X_i2c_write(Dev->I2cDevAddr, index, &buffer, (uint8_t)1);
+        status = VL53L0X_i2c_write(index,&buffer,(uint8_t)1);
     }
     return status;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_i2c_write(uint8_t DeviceAddr, uint8_t RegisterAddr, uint8_t *p_data,
+VL53L0X_Error VL53L0X::VL53L0X_i2c_write(uint8_t RegisterAddr,uint8_t *p_data,
         uint16_t NumByteToWrite)
 {
     int ret;
 
-    ret = _dev_i2c->i2c_write(p_data, DeviceAddr, RegisterAddr, NumByteToWrite);
+    ret = _dev_i2c->i2c_write(p_data,_device->I2cDevAddr,RegisterAddr,NumByteToWrite);
 
     if (ret) {
         return -1;
@@ -5091,12 +4753,12 @@
     return 0;
 }
 
-VL53L0X_Error VL53L0X::VL53L0X_i2c_read(uint8_t DeviceAddr, uint8_t RegisterAddr, uint8_t *p_data,
+VL53L0X_Error VL53L0X::VL53L0X_i2c_read(uint8_t RegisterAddr,uint8_t *p_data,
                                         uint16_t NumByteToRead)
 {
     int ret;
 
-    ret = _dev_i2c->i2c_read(p_data, DeviceAddr, RegisterAddr, NumByteToRead);
+    ret = _dev_i2c->i2c_read(p_data,_device->I2cDevAddr,RegisterAddr,NumByteToRead);
 
     if (ret) {
         return -1;
@@ -5109,7 +4771,7 @@
     int status = 0;
     uint16_t rl_id = 0;
 
-    status = VL53L0X_read_word(_device, VL53L0X_REG_IDENTIFICATION_MODEL_ID, &rl_id);
+    status = VL53L0X_read_word(VL53L0X_REG_IDENTIFICATION_MODEL_ID,&rl_id);
     if (rl_id == 0xEEAA) {
         return status;
     }
@@ -5118,7 +4780,7 @@
 }
 
 
-VL53L0X_Error VL53L0X::wait_measurement_data_ready(VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::wait_measurement_data_ready()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint8_t new_dat_ready = 0;
@@ -5129,12 +4791,12 @@
     if (status == VL53L0X_ERROR_NONE) {
         loop_nb = 0;
         do {
-            status = VL53L0X_get_measurement_data_ready(dev, &new_dat_ready);
+            status = VL53L0X_get_measurement_data_ready(&new_dat_ready);
             if ((new_dat_ready == 0x01) || status != VL53L0X_ERROR_NONE) {
                 break;
             }
             loop_nb = loop_nb + 1;
-            VL53L0X_polling_delay(dev);
+            VL53L0X_polling_delay();
         } while (loop_nb < VL53L0X_DEFAULT_MAX_LOOP);
 
         if (loop_nb >= VL53L0X_DEFAULT_MAX_LOOP) {
@@ -5145,7 +4807,7 @@
     return status;
 }
 
-VL53L0X_Error VL53L0X::wait_stop_completed(VL53L0X_DEV dev)
+VL53L0X_Error VL53L0X::wait_stop_completed()
 {
     VL53L0X_Error status = VL53L0X_ERROR_NONE;
     uint32_t stop_completed = 0;
@@ -5156,12 +4818,12 @@
     if (status == VL53L0X_ERROR_NONE) {
         loop_nb = 0;
         do {
-            status = VL53L0X_get_stop_completed_status(dev, &stop_completed);
+            status = VL53L0X_get_stop_completed_status(&stop_completed);
             if ((stop_completed == 0x00) || status != VL53L0X_ERROR_NONE) {
                 break;
             }
             loop_nb = loop_nb + 1;
-            VL53L0X_polling_delay(dev);
+            VL53L0X_polling_delay();
         } while (loop_nb < VL53L0X_DEFAULT_MAX_LOOP);
 
         if (loop_nb >= VL53L0X_DEFAULT_MAX_LOOP) {
@@ -5181,7 +4843,7 @@
     VL53L0X_off();
     VL53L0X_on();
 
-//   status=VL53L0X_WaitDeviceBooted(Device);
+//   status=VL53L0X_WaitDeviceBooted(ice);
 //   if(status)
 //      printf("WaitDeviceBooted fail\n\r");
     status = is_present();
@@ -5193,7 +4855,7 @@
         }
 
         // deduce silicon version
-        status = VL53L0X_get_device_info(&_my_device, &_device_info);
+        status = VL53L0X_get_device_info(&_device_info);
 
         status = prepare();
         if (status != VL53L0X_ERROR_NONE) {
@@ -5219,11 +4881,9 @@
 {
     int status;
 
-    status = VL53L0X_stop_measurement(_device); // it is safer to do this while sensor is stopped
-
-//   status = VL53L0X_SetInterruptThresholds(Device, VL53L0X_DEVICEMODE_CONTINUOUS_RANGING, 0, 300);
-
-    status = VL53L0X_set_gpio_config(_device, 0, VL53L0X_DEVICEMODE_CONTINUOUS_RANGING,
+    status = VL53L0X_stop_measurement(); // it is safer to do this while sensor is stopped
+
+    status = VL53L0X_set_gpio_config(0,VL53L0X_DEVICEMODE_CONTINUOUS_RANGING,
                                      VL53L0X_REG_SYSTEM_INTERRUPT_GPIO_NEW_SAMPLE_READY,
                                      VL53L0X_INTERRUPTPOLARITY_HIGH);
 
@@ -5233,7 +4893,7 @@
     }
 
     clear_interrupt(VL53L0X_REG_RESULT_INTERRUPT_STATUS | VL53L0X_REG_RESULT_RANGE_STATUS);
-    // NB: return value was previously only passed to logging macro, but did not get passed back 
+    // NB: return value was previously only passed to logging macro,but did not get passed back 
 
     if (!status) {
         status = range_start_continuous_mode();
@@ -5242,14 +4902,14 @@
 }
 
 
-int VL53L0X::start_measurement(OperatingMode operating_mode, void (*fptr)(void))
+int VL53L0X::start_measurement(OperatingMode operating_mode,void (*fptr)(void))
 {
     int Status = VL53L0X_ERROR_NONE;
 
     uint8_t VhvSettings;
     uint8_t PhaseCal;
-    // *** from mass market cube expansion v1.1, ranging with satellites.
-    // default settings, for normal range.
+    // *** from mass market cube expansion v1.1,ranging with satellites.
+    // default settings,for normal range.
     FixPoint1616_t signalLimit = (FixPoint1616_t)(0.25 * 65536);
     FixPoint1616_t sigmaLimit = (FixPoint1616_t)(18 * 65536);
     uint32_t timingBudget = 33000;
@@ -5262,11 +4922,9 @@
             return 1;
         }
 
-        Status = VL53L0X_stop_measurement(_device); // it is safer to do this while sensor is stopped
-
-//        Status = VL53L0X_SetInterruptThresholds(Device, VL53L0X_DEVICEMODE_CONTINUOUS_RANGING, 0, 300);
-
-        Status = VL53L0X_set_gpio_config(_device, 0, VL53L0X_DEVICEMODE_CONTINUOUS_RANGING,
+        Status = VL53L0X_stop_measurement(); // it is safer to do this while sensor is stopped
+
+        Status = VL53L0X_set_gpio_config(0,VL53L0X_DEVICEMODE_CONTINUOUS_RANGING,
                                          VL53L0X_REG_SYSTEM_INTERRUPT_GPIO_NEW_SAMPLE_READY,
                                          VL53L0X_INTERRUPTPOLARITY_HIGH);
 
@@ -5276,35 +4934,35 @@
         }
 
         clear_interrupt(VL53L0X_REG_RESULT_INTERRUPT_STATUS | VL53L0X_REG_RESULT_RANGE_STATUS);
-    	// NB: return value was previously only passed to logging macro, but did not get passed back 
+    	// NB: return value was previously only passed to logging macro,but did not get passed back 
 
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_set_device_mode(_device, VL53L0X_DEVICEMODE_CONTINUOUS_RANGING); // Setup in continuous ranging mode
+            Status = VL53L0X_set_device_mode(VL53L0X_DEVICEMODE_CONTINUOUS_RANGING); // Setup in continuous ranging mode
         }
 
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_start_measurement(_device);
+            Status = VL53L0X_start_measurement();
         }
     }
 
     if (operating_mode == range_single_shot_polling) {
-        // singelshot, polled ranging
+        // singelshot,polled ranging
         if (Status == VL53L0X_ERROR_NONE) {
             // no need to do this when we use VL53L0X_PerformSingleRangingMeasurement
-            Status = VL53L0X_set_device_mode(_device, VL53L0X_DEVICEMODE_SINGLE_RANGING); // Setup in single ranging mode
+            Status = VL53L0X_set_device_mode(VL53L0X_DEVICEMODE_SINGLE_RANGING); // Setup in single ranging mode
         }
 
         // Enable/Disable Sigma and Signal check
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_set_limit_check_enable(_device,
-                                                    VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE, 1);
+            Status = VL53L0X_set_limit_check_enable(
+                                                    VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE,1);
         }
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_set_limit_check_enable(_device,
-                                                    VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE, 1);
+            Status = VL53L0X_set_limit_check_enable(
+                                                    VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE,1);
         }
 
-// *** from mass market cube expansion v1.1, ranging with satellites.
+// *** from mass market cube expansion v1.1,ranging with satellites.
         /* Ranging configuration */
 //*
 //        switch(rangingConfig) {
@@ -5335,31 +4993,31 @@
         */
 
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_set_limit_check_value(_device,
-                                                   VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE, signalLimit);
+            Status = VL53L0X_set_limit_check_value(
+                                                   VL53L0X_CHECKENABLE_SIGNAL_RATE_FINAL_RANGE,signalLimit);
         }
 
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_set_limit_check_value(_device,
-                                                   VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE, sigmaLimit);
+            Status = VL53L0X_set_limit_check_value(
+                                                   VL53L0X_CHECKENABLE_SIGMA_FINAL_RANGE,sigmaLimit);
         }
 
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_set_measurement_timing_budget_micro_seconds(_device, timingBudget);
+            Status = VL53L0X_set_measurement_timing_budget_micro_seconds(timingBudget);
         }
 
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_set_vcsel_pulse_period(_device,
-                                                    VL53L0X_VCSEL_PERIOD_PRE_RANGE, preRangeVcselPeriod);
+            Status = VL53L0X_set_vcsel_pulse_period(
+                                                    VL53L0X_VCSEL_PERIOD_PRE_RANGE,preRangeVcselPeriod);
         }
 
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_set_vcsel_pulse_period(_device,
-                                                    VL53L0X_VCSEL_PERIOD_FINAL_RANGE, finalRangeVcselPeriod);
+            Status = VL53L0X_set_vcsel_pulse_period(
+                                                    VL53L0X_VCSEL_PERIOD_FINAL_RANGE,finalRangeVcselPeriod);
         }
 
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_perform_ref_calibration(_device, &VhvSettings, &PhaseCal);
+            Status = VL53L0X_perform_ref_calibration(&VhvSettings,&PhaseCal);
         }
 
     }
@@ -5367,12 +5025,12 @@
     if (operating_mode == range_continuous_polling) {
         if (Status == VL53L0X_ERROR_NONE) {
             //printf("Call of VL53L0X_SetDeviceMode\n");
-            Status = VL53L0X_set_device_mode(_device, VL53L0X_DEVICEMODE_CONTINUOUS_RANGING); // Setup in continuous ranging mode
+            Status = VL53L0X_set_device_mode(VL53L0X_DEVICEMODE_CONTINUOUS_RANGING); // Setup in continuous ranging mode
         }
 
         if (Status == VL53L0X_ERROR_NONE) {
             //printf("Call of VL53L0X_StartMeasurement\n");
-            Status = VL53L0X_start_measurement(_device);
+            Status = VL53L0X_start_measurement();
         }
     }
 
@@ -5380,31 +5038,31 @@
 }
 
 
-int VL53L0X::get_measurement(OperatingMode operating_mode, VL53L0X_RangingMeasurementData_t *p_data)
+int VL53L0X::get_measurement(OperatingMode operating_mode,VL53L0X_RangingMeasurementData_t *p_data)
 {
     int Status = VL53L0X_ERROR_NONE;
 
     if (operating_mode == range_single_shot_polling) {
-        Status = VL53L0X_perform_single_ranging_measurement(_device, p_data);
+        Status = VL53L0X_perform_single_ranging_measurement(p_data);
     }
 
     if (operating_mode == range_continuous_polling) {
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_measurement_poll_for_completion(_device);
+            Status = VL53L0X_measurement_poll_for_completion();
         }
 
         if (Status == VL53L0X_ERROR_NONE) {
-            Status = VL53L0X_get_ranging_measurement_data(_device, p_data);
+            Status = VL53L0X_get_ranging_measurement_data(p_data);
 
             // Clear the interrupt
-            VL53L0X_clear_interrupt_mask(_device, VL53L0X_REG_SYSTEM_INTERRUPT_GPIO_NEW_SAMPLE_READY);
-            VL53L0X_polling_delay(_device);
+            VL53L0X_clear_interrupt_mask(VL53L0X_REG_SYSTEM_INTERRUPT_GPIO_NEW_SAMPLE_READY);
+            VL53L0X_polling_delay();
         }
     }
 
     if (operating_mode == range_continuous_interrupt) {
-        Status = VL53L0X_get_ranging_measurement_data(_device, p_data);
-        VL53L0X_clear_interrupt_mask(_device, VL53L0X_REG_SYSTEM_INTERRUPT_CLEAR | VL53L0X_REG_RESULT_INTERRUPT_STATUS);
+        Status = VL53L0X_get_ranging_measurement_data(p_data);
+        VL53L0X_clear_interrupt_mask(VL53L0X_REG_SYSTEM_INTERRUPT_CLEAR | VL53L0X_REG_RESULT_INTERRUPT_STATUS);
     }
 
     return Status;
@@ -5424,16 +5082,16 @@
         // continuous mode
         if (status == VL53L0X_ERROR_NONE) {
             //printf("Call of VL53L0X_StopMeasurement\n");
-            status = VL53L0X_stop_measurement(_device);
+            status = VL53L0X_stop_measurement();
         }
 
         if (status == VL53L0X_ERROR_NONE) {
             //printf("Wait Stop to be competed\n");
-            status = wait_stop_completed(_device);
+            status = wait_stop_completed();
         }
 
         if (status == VL53L0X_ERROR_NONE)
-            status = VL53L0X_clear_interrupt_mask(_device,
+            status = VL53L0X_clear_interrupt_mask(
                                                   VL53L0X_REG_SYSTEM_INTERRUPT_GPIO_NEW_SAMPLE_READY);
     }
 
@@ -5441,13 +5099,12 @@
 }
 
 
-int VL53L0X::handle_irq(OperatingMode operating_mode, VL53L0X_RangingMeasurementData_t *data)
+int VL53L0X::handle_irq(OperatingMode operating_mode,VL53L0X_RangingMeasurementData_t *data)
 {
     int status;
-    status = get_measurement(operating_mode, data);
+    status = get_measurement(operating_mode,data);
     enable_interrupt_measure_detection_irq();
     return status;
 }
 
-
 /******************************************************************************/