Revision 0:b0addee6d8d1, committed 2018-07-21

Comitter:

phonemacro

Date:

Sat Jul 21 07:30:15 2018 +0000

Commit message:

convert to library from folder

Changed in this revision

diff -r 000000000000 -r b0addee6d8d1 MAX30101.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX30101.cpp	Sat Jul 21 07:30:15 2018 +0000
@@ -0,0 +1,721 @@
+/*******************************************************************************
+ * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *******************************************************************************
+ */
+
+#include "mbed.h"
+#include "MAX30101.h"
+
+MAX30101 *MAX30101::instance = NULL;
+
+//******************************************************************************
+MAX30101::MAX30101(PinName sda, PinName scl, int slaveAddress): 
+          slaveAddress(slaveAddress) {
+  i2c = new I2C(sda, scl);
+  i2c_owner = true;
+  i2c->frequency(400000);
+  onInterruptCallback = NULL;
+  onDataAvailableCallback = NULL;
+  instance = this;
+}
+
+//******************************************************************************
+MAX30101::MAX30101(I2C *_i2c, int slaveAddress) : 
+          slaveAddress(slaveAddress) {
+  i2c = _i2c;
+  i2c_owner = false;
+  i2c->frequency(400000);
+  onInterruptCallback = NULL;
+  onDataAvailableCallback = NULL;
+  instance = this;
+}
+
+//******************************************************************************
+MAX30101::~MAX30101(void) {
+  if (i2c_owner) {
+    delete i2c;
+  }
+}
+
+//******************************************************************************
+int MAX30101::int_handler(void) {
+  uint16_t index, i;
+  uint16_t rx_bytes, second_rx_bytes;
+  char temp_int;
+  char temp_frac;
+  uint16_t num_active_led;
+  uint32_t sample;
+  int loop = 1;
+  static uint8_t cntr_int = 0;
+
+  max30101_Interrupt_Status_1_t   Interrupt_Status_1;
+  max30101_Interrupt_Status_2_t   Interrupt_Status_2;
+  max30101_mode_configuration_t   mode_configuration;
+  max30101_multiLED_mode_ctrl_1_t multiLED_mode_ctrl_1;
+  max30101_multiLED_mode_ctrl_2_t multiLED_mode_ctrl_2;
+  max30101_spo2_configuration_t   spo2_configuration;
+  max30101_fifo_configuration_t   fifo_configuration;
+
+  cntr_int++;
+
+  while (loop) {
+    if (i2c_reg_read(REG_INT_STAT_1, &Interrupt_Status_1.all) != 0) { ///< Read Interrupt flag bits
+      return -1;
+    }
+
+    if (i2c_reg_read(REG_INT_STAT_2, &Interrupt_Status_2.all) != 0) { ///< Read Interrupt flag bits
+      return -1;
+    }
+
+    /* Read all the relevant register bits */
+    if (i2c_reg_read(REG_MODE_CFG, &mode_configuration.all) != 0) {
+      return -1;
+    }
+
+
+    if (i2c_reg_read(REG_SLT2_SLT1, &multiLED_mode_ctrl_1.all) != 0) {
+      return -1;
+    }
+    
+
+    if (i2c_reg_read(REG_SLT4_SLT3, &multiLED_mode_ctrl_2.all) != 0) {
+      return -1;
+    }    
+    
+
+    if (i2c_reg_read(REG_SPO2_CFG, &spo2_configuration.all) != 0) {
+      return -1;
+    }  
+    
+
+    if (i2c_reg_read(REG_FIFO_CFG, &fifo_configuration.all) != 0) {
+      return -1;
+    }     
+    
+    
+
+    if (Interrupt_Status_1.bit.a_full) {
+      ///< Read the sample(s)
+      char reg = REG_FIFO_DATA;
+
+      num_active_led = 0;
+
+     if (mode_configuration.bit.mode == 0x02) {///< Heart Rate mode, i.e. 1 led    
+        num_active_led = 1;
+      } else if (mode_configuration.bit.mode == 0x03) { ///< SpO2 mode, i.e. 2 led
+        num_active_led = 2;
+      } else if (mode_configuration.bit.mode == 0x07) { ///< Multi-LED mode, i.e. 1-4 led
+        if (multiLED_mode_ctrl_1.bit.slot1 != 0) {
+          num_active_led++;
+        }
+
+        if (multiLED_mode_ctrl_1.bit.slot2 != 0) {
+          num_active_led++;
+        }
+
+        if (multiLED_mode_ctrl_2.bit.slot3 != 0) {
+          num_active_led++;
+        }
+
+        if (multiLED_mode_ctrl_2.bit.slot4 != 0) {
+          num_active_led++;
+        }
+      }
+               ///< 3bytes/LED x Number of Active LED x FIFO level selected
+        rx_bytes =  3 * num_active_led * (32-fifo_configuration.bit.fifo_a_full);   
+
+      second_rx_bytes = rx_bytes;
+      
+      /**
+       * @brief: 
+       * The FIFO Size is determined by the Sample size.  The number of bytes
+       * in a Sample is dictated by number of LED's
+       *
+       *   #LED Selected     Bytes in "1" sample
+       *        1                  3
+       *        2                  6
+       *        3                  9
+       *        4                  12
+       *
+       *  The I2C API function limits the number of bytes to read, to 256 (i.e.
+       *  char).  Therefore, when set for Multiple LED's and the FIFO
+       *  size is set to 32.  It would mean there is more than 256 bytes.
+       *  In that case two I2C reads have to be made.  However It is important
+       *  to note that each "Sample" must be read completely and reading only
+       *  partial number of bytes from a sample will result in erroneous data.
+       * 
+       *
+       *  For example:
+       *  Num of LED selected = 3 and FIFO size is set to 32 (i.e. 0 value in
+       *  register), then the number of bytes will be
+       *  3bytes/Led * 3led's * 32 = 288 bytes in all.  Since there are
+       *  3 LED's each sample will contain (3 * 3) 9bytes.  
+       *  Therefore Sample 1 = 9bytes, Sample 2 = 18,... Sample 28 = 252. 
+       *  Therefore the first I2C read should be 252 bytes and the second
+       *  read should be 288-252 = 36.
+       *
+       *  It turns out that this size issue comes up only when number of LED
+       * selected is 3 or 4 and choosing 252bytes
+       *  for the first I2C read would work for both Number of LED selection.
+       */
+
+      if (rx_bytes <= CHUNK_SIZE) {
+        I2CM_Read(slaveAddress, &reg, 1, &max30101_rawData[0],
+                  (char)rx_bytes /*total_databytes_1*/);
+      } else {
+        I2CM_Read(slaveAddress, &reg, 1, &max30101_rawData[0], CHUNK_SIZE);
+
+        second_rx_bytes = second_rx_bytes - CHUNK_SIZE;
+        I2CM_Read(slaveAddress, &reg, 1, &max30101_rawData[CHUNK_SIZE],
+                  (char)second_rx_bytes);
+      }
+
+      index = 0;
+
+      for (i = 0; i < rx_bytes; i += 3) {
+        sample = ((uint32_t)(max30101_rawData[i] & 0x03) << 16) | (max30101_rawData[i + 1] << 8) | max30101_rawData[i + 2];
+
+        ///< Right shift the data based on the LED_PW setting
+        sample = sample >> (3 - spo2_configuration.bit.led_pw); // 0=shift 3, 1=shift 2, 2=shift 1, 3=no shift
+
+        max30101_buffer[index++] = sample;
+      }
+
+      onDataAvailableCallback(MAX30101_OXIMETER_DATA + num_active_led, max30101_buffer, index);
+    }
+
+
+    ///< This interrupt handles the temperature interrupt
+    if (Interrupt_Status_2.bit.die_temp_rdy) {
+      char reg;
+
+      reg = REG_TINT;
+      if (I2CM_Read(slaveAddress, &reg, 1, &temp_int, 1) != 0) {
+        return -1;
+      }
+
+      reg = REG_TFRAC;
+      if (I2CM_Read(slaveAddress, &reg, 1, &temp_frac, 1) != 0) {
+        return -1;
+      }
+
+      max30101_final_temp = (int8_t)temp_int + 0.0625f * temp_frac;
+
+      if (i2c_reg_write(REG_TEMP_EN, 0x00) != 0) { ///< Die Temperature Config, Temp disable... after one read...
+        return -1;
+      }
+    }
+
+    if (i2c_reg_read(REG_INT_STAT_1, &Interrupt_Status_1.all) != 0) { ///< Read Interrupt flag bits
+
+      return -1;
+    }
+    if (Interrupt_Status_1.bit.a_full != 1) {
+      loop = 0;
+    }
+  }
+
+  interruptPostCallback();
+
+
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::SpO2mode_init(uint8_t fifo_waterlevel_mark, uint8_t sample_avg,
+                            uint8_t sample_rate, uint8_t pulse_width,
+                            uint8_t red_led_current, uint8_t ir_led_current) {
+
+  char status;
+
+  max30101_mode_configuration_t  mode_configuration;
+  max30101_fifo_configuration_t  fifo_configuration;
+  max30101_spo2_configuration_t  spo2_configuration;
+  max30101_Interrupt_Enable_1_t  Interrupt_Enable_1;
+
+  mode_configuration.all = 0;
+  mode_configuration.bit.reset = 1;
+  if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) // Reset the device
+  {
+    return -1;
+  }
+
+  ///< Give it some settle time (100ms)
+  wait(1.0 / 10.0); ///< Let things settle down a bit
+
+  fifo_configuration.all = 0;
+  fifo_configuration.bit.smp_ave = sample_avg; ///< Sample averaging;
+  fifo_configuration.bit.fifo_roll_over_en = 1; ///< FIFO Roll over enabled
+  fifo_configuration.bit.fifo_a_full = fifo_waterlevel_mark; ///< Interrupt when certain level is filled
+
+  if (i2c_reg_write(REG_FIFO_CFG, fifo_configuration.all) != 0) {
+    return -1;
+  }
+
+  spo2_configuration.bit.spo2_adc_rge = 0x2; ///< ADC Range 8192 fullscale
+  spo2_configuration.bit.spo2_sr = sample_rate; ///< 100 Samp/sec.
+  spo2_configuration.bit.led_pw = pulse_width; ///< Pulse Width=411us and ADC Resolution=18
+  if (i2c_reg_write(REG_SPO2_CFG, spo2_configuration.all) != 0) {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_LED1_PA, red_led_current) != 0) {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_LED2_PA, ir_led_current) != 0) {
+    return -1;
+  }
+
+  /************/
+
+  if (i2c_reg_read(REG_INT_STAT_1, &status) != 0) ///<  Clear INT1 by reading the status
+  {
+    return -1;
+  }
+
+  if (i2c_reg_read(REG_INT_STAT_2, &status) != 0) ///<  Clear INT2 by reading the status
+  {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_FIFO_W_PTR, 0x00) != 0) ///<  Clear FIFO ptr
+  {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_FIFO_OVF_CNT, 0x00) != 0) ///<  Clear FIFO ptr
+  {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_FIFO_R_PTR, 0x00) != 0) ///<  Clear FIFO ptr
+  {
+    return -1;
+  }
+
+  Interrupt_Enable_1.all = 0;
+  Interrupt_Enable_1.bit.a_full_en = 1; ///<  Enable FIFO almost full interrupt
+  if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) {
+    return -1;
+  }
+
+  mode_configuration.all = 0;
+  mode_configuration.bit.mode = 0x03; ///< SpO2 mode
+  if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) {
+    return -1;
+  }
+
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::SpO2mode_stop(void) {
+
+  max30101_Interrupt_Enable_1_t  Interrupt_Enable_1;
+  max30101_mode_configuration_t  mode_configuration;
+  uint8_t                      led1_pa;
+  uint8_t                      led2_pa;
+
+  Interrupt_Enable_1.all = 0;
+  Interrupt_Enable_1.bit.a_full_en = 0; ///<  Disable FIFO almost full interrupt
+  if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) {
+    return -1;
+  }
+
+  mode_configuration.all = 0;
+  mode_configuration.bit.mode = 0x00; ///< SpO2 mode off
+  if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) {
+    return -1;
+  }
+
+  led1_pa = 0; ///< RED LED current, 0.0
+  if (i2c_reg_write(REG_LED1_PA, led1_pa) != 0) {
+    return -1;
+  }
+
+  led2_pa = 0; ///< IR LED current, 0.0
+  if (i2c_reg_write(REG_LED2_PA, led2_pa) != 0) {
+    return -1;
+  }
+
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::HRmode_init(uint8_t fifo_waterlevel_mark, uint8_t sample_avg,
+                          uint8_t sample_rate, uint8_t pulse_width,
+                          uint8_t red_led_current) {
+
+  /*uint8_t*/ char status;
+
+  max30101_mode_configuration_t  mode_configuration;
+  max30101_fifo_configuration_t  fifo_configuration;
+  max30101_spo2_configuration_t  spo2_configuration;
+  max30101_Interrupt_Enable_1_t  Interrupt_Enable_1;
+
+  mode_configuration.all = 0;
+  mode_configuration.bit.reset = 1;
+  if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) ///< Reset the device, Mode = don't use...
+  {
+    return -1;
+  }
+
+  ///< Give it some settle time (100ms)
+  wait(1.0 / 10.0); ///< Let things settle down a bit
+
+  fifo_configuration.all = 0;
+  fifo_configuration.bit.smp_ave = sample_avg;  ///< Sample averaging;
+  fifo_configuration.bit.fifo_roll_over_en = 1; ///< FIFO Roll over enabled
+  fifo_configuration.bit.fifo_a_full = fifo_waterlevel_mark; ///< Interrupt when certain level is filled
+  if (i2c_reg_write(REG_FIFO_CFG, fifo_configuration.all) != 0) {
+    return -1;
+  }
+
+  spo2_configuration.bit.spo2_adc_rge = 0x2;    ///< ADC Range 8192 fullscale
+  spo2_configuration.bit.spo2_sr = sample_rate; ///< 100 Samp/sec.
+  spo2_configuration.bit.led_pw = pulse_width;  ///< Pulse Width=411us and ADC Resolution=18
+  if (i2c_reg_write(REG_SPO2_CFG, spo2_configuration.all) != 0) {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_LED1_PA, red_led_current) != 0) {
+    return -1;
+  }
+
+  /************/
+
+  if (i2c_reg_read(REG_INT_STAT_1, &status) != 0) ///<  Clear INT1 by reading the status
+  {
+    return -1;
+  }
+
+  if (i2c_reg_read(REG_INT_STAT_2, &status) != 0) ///< Clear INT2 by reading the status
+  {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_FIFO_W_PTR, 0x00) != 0) ///<  Clear FIFO ptr
+  {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_FIFO_OVF_CNT, 0x00) != 0) ///<  Clear FIFO ptr
+  {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_FIFO_R_PTR, 0x00) != 0) ///<  Clear FIFO ptr
+  {
+    return -1;
+  }
+
+  Interrupt_Enable_1.all = 0;
+  Interrupt_Enable_1.bit.a_full_en = 1;
+  
+  // Interrupt
+  if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) {
+    return -1;
+  }
+
+  mode_configuration.all = 0;
+  mode_configuration.bit.mode = 0x02; ///< HR mode
+  if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) {
+    return -1;
+  }
+
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::HRmode_stop(void) {
+
+  max30101_Interrupt_Enable_1_t  Interrupt_Enable_1;
+  max30101_mode_configuration_t  mode_configuration;
+
+  Interrupt_Enable_1.all = 0;
+  Interrupt_Enable_1.bit.a_full_en = 0; ///< Disable FIFO almost full interrupt
+  if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) {
+    return -1;
+  }
+
+  mode_configuration.all = 0;
+  mode_configuration.bit.mode = 0x00; ///< HR mode off
+  if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_LED1_PA, 0) != 0) {
+    return -1;
+  }
+
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::Multimode_init(uint8_t fifo_waterlevel_mark, uint8_t sample_avg,
+                             uint8_t sample_rate, uint8_t pulse_width,
+                             uint8_t red_led_current, uint8_t ir_led_current,
+                             uint8_t green_led_current, uint8_t slot_1,
+                             uint8_t slot_2, uint8_t slot_3, uint8_t slot_4) {
+
+  char status;
+  max30101_mode_configuration_t    mode_configuration;
+  max30101_fifo_configuration_t    fifo_configuration;
+  max30101_spo2_configuration_t    spo2_configuration;
+  max30101_multiLED_mode_ctrl_1_t  multiLED_mode_ctrl_1;
+  max30101_multiLED_mode_ctrl_2_t  multiLED_mode_ctrl_2;
+  max30101_Interrupt_Enable_1_t    Interrupt_Enable_1;
+  
+  mode_configuration.all = 0;
+  mode_configuration.bit.reset = 1;
+  if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) ///< Reset the device, Mode = don't use...
+  {
+    return -1;
+  }
+
+  /* Give it some settle time (100ms) */ ///< Let things settle down a bit
+  wait(1.0 / 10.0);
+
+  fifo_configuration.all = 0;
+  fifo_configuration.bit.smp_ave = sample_avg; ///< Sample averaging;
+  fifo_configuration.bit.fifo_roll_over_en = 1; ///< FIFO Roll over enabled
+  fifo_configuration.bit.fifo_a_full =
+      fifo_waterlevel_mark; ///< Interrupt when certain level is filled
+  if (i2c_reg_write(REG_FIFO_CFG, fifo_configuration.all) != 0) {
+    return -1;
+  }
+
+  spo2_configuration.bit.spo2_adc_rge = 0x2;    ///< ADC Range 8192 fullscale
+  spo2_configuration.bit.spo2_sr = sample_rate; ///< 100 Samp/sec.
+  spo2_configuration.bit.led_pw = pulse_width;  ///< Pulse Width=411us and ADC Resolution=18
+  if (i2c_reg_write(REG_SPO2_CFG, spo2_configuration.all) != 0) {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_LED1_PA, red_led_current) != 0) {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_LED2_PA, ir_led_current) != 0) {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_LED3_PA, green_led_current) != 0) {
+    return -1;
+  }
+
+  ///< 0x01=Red(LED1), 0x02=IR(LED2), 0x03=Green(LED3) : Use LEDn_PA to adjust the intensity
+  ///< 0x05=Red      , 0x06=IR      , 0x07=Green       : Use PILOT_PA to adjust the intensity DO NOT USE THIS ROW...
+
+  multiLED_mode_ctrl_1.bit.slot1 = slot_1;
+  multiLED_mode_ctrl_1.bit.slot2 = slot_2;
+  if (i2c_reg_write(REG_SLT2_SLT1, multiLED_mode_ctrl_1.all)) {
+    return -1;
+  }
+
+  multiLED_mode_ctrl_2.all = 0;
+  multiLED_mode_ctrl_2.bit.slot3 = slot_3;
+  multiLED_mode_ctrl_2.bit.slot4 = slot_4;
+  if (i2c_reg_write(REG_SLT4_SLT3, multiLED_mode_ctrl_2.all)) {
+    return -1;
+  }
+
+  /************/
+
+  if (i2c_reg_read(REG_INT_STAT_1, &status) != 0) ///<  Clear INT1 by reading the status
+  {
+    return -1;
+  }
+
+  if (i2c_reg_read(REG_INT_STAT_2, &status) != 0) ///<  Clear INT2 by reading the status
+  {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_FIFO_W_PTR, 0x00) != 0) ///<  Clear FIFO ptr
+  {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_FIFO_OVF_CNT, 0x00) != 0) ///<  Clear FIFO ptr
+  {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_FIFO_R_PTR, 0x00) != 0) ///<  Clear FIFO ptr
+  {
+    return -1;
+  }
+
+  Interrupt_Enable_1.all = 0;
+  Interrupt_Enable_1.bit.a_full_en = 1; ///<  Enable FIFO almost full interrupt
+  if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) {
+    return -1;
+  }
+
+  mode_configuration.all = 0;
+  mode_configuration.bit.mode = 0x07; ///< Multi-LED mode
+  if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) {
+    return -1;
+  }
+
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::Multimode_stop(void) {
+
+max30101_Interrupt_Enable_1_t  Interrupt_Enable_1;
+max30101_mode_configuration_t  mode_configuration;
+
+
+  Interrupt_Enable_1.all = 0;
+  Interrupt_Enable_1.bit.a_full_en = 0; ///< Disable FIFO almost full interrupt
+  if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) {
+    return -1;
+  }
+
+  mode_configuration.all = 0;
+  mode_configuration.bit.mode = 0x00; ///< Multi-LED mode off
+  if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_LED1_PA, 0) != 0) {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_LED2_PA, 0) != 0) {
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_LED3_PA, 0) != 0) {
+    return -1;
+  }
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::tempread(void) {
+   
+  if (i2c_reg_write(REG_INT_EN_2, 0x02) != 0) {///< Interrupt Enable 2, Temperature Interrupt
+    return -1;
+  }
+
+  if (i2c_reg_write(REG_TEMP_EN, 0x01) != 0) {///< Die Temperature Config, Temp enable...
+
+    return -1;
+  }
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::i2c_reg_write(MAX30101_REG_map_t reg, char value) {
+
+  char cmdData[2] = {reg, value};
+
+  if (I2CM_Write(slaveAddress, NULL, 0, cmdData, 2) != 0) {
+    return -1;
+  }
+
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::i2c_reg_read(MAX30101_REG_map_t reg, char *value) {
+  if (I2CM_Read(slaveAddress, (char *)&reg, 1, value, 1) != 0 /*1*/) {
+    return -1;
+  }
+
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::I2CM_Read(int slaveAddress, char *writeData, char writeCount,
+                        char *readData, char readCount) {
+
+  if (writeData != NULL && writeCount != 0) {
+    i2c->write(slaveAddress, writeData, writeCount, true);
+  }
+  if (readData != NULL && readCount != 0) {
+    i2c->read(slaveAddress, readData, readCount);
+  }
+  return 0;
+}
+
+//******************************************************************************
+int MAX30101::I2CM_Write(int slaveAddress, char *writeData1, char writeCount1,
+                         char *writeData2, char writeCount2) {
+ 
+  if (writeData1 != NULL && writeCount1 != 0) {
+    i2c->write(slaveAddress, writeData1, writeCount1);
+  }
+  if (writeData2 != NULL && writeCount2 != 0) {
+    i2c->write(slaveAddress, writeData2, writeCount2);
+  }
+  return 0;
+}
+
+//******************************************************************************
+void MAX30101::onDataAvailable(DataCallbackFunction _onDataAvailable) {
+
+  onDataAvailableCallback = _onDataAvailable;
+}
+
+//******************************************************************************
+void MAX30101::dataAvailable(uint32_t id, uint32_t *buffer, uint32_t length) {
+
+  if (onDataAvailableCallback != NULL) {
+    (*onDataAvailableCallback)(id, buffer, length);
+  }
+}
+
+//******************************************************************************
+void MAX30101::onInterrupt(InterruptFunction _onInterrupt) {
+
+  onInterruptCallback = _onInterrupt;
+}
+
+//******************************************************************************
+void MAX30101::interruptPostCallback(void) {
+
+  if (onInterruptCallback != NULL) {
+
+    (*onInterruptCallback)();
+  }
+}
+
+//******************************************************************************
+void MAX30101::MidIntHandler(void) { 
+
+  MAX30101::instance->int_handler();
+}

diff -r 000000000000 -r b0addee6d8d1 MAX30101.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX30101.h	Sat Jul 21 07:30:15 2018 +0000
@@ -0,0 +1,568 @@
+/*******************************************************************************
+/ * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+ * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *******************************************************************************/
+/** 
+ * Maxim Integrated MAX30101 Oximeter chip
+ *  
+ * IMPORTANT: The code below will also need MAX14720.cpp and MAX14720.h
+ * 
+ * @code
+ * #include "mbed.h"
+ * #include "MAX14720.h"
+ * #include "MAX30101.h"
+ * 
+ * 
+ * /// define the HVOUT Boost Voltage default for the MAX14720 PMIC
+ * #define HVOUT_VOLTAGE 4500 // set to 4500 mV
+ * 
+ * /// define all I2C addresses
+ * #define MAX14720_I2C_SLAVE_ADDR (0x54)
+ * #define MAX30101_I2C_SLAVE_ADDR (0xAE)
+ * 
+ * /// Settings for the HR initialization
+ * #define FIFO_WATERLEVEL_MARK 15
+ * #define SAMPLE_AVG           2
+ * #define SAMPLE_RATE          1
+ * #define PULSE_WIDTH          2
+ * #define RED_LED_CURRENT      0x1F
+ *  
+ *  /// Buffer size for streaming data out.
+ * #define BUFFER_LENGTH 50 
+ * 
+ * 
+ * /// I2C Master 2
+ * I2C i2c2(I2C2_SDA, I2C2_SCL); // used by MAX14720, MAX30101, LIS2DH
+ * /// SPI Master 0 with SPI0_SS for use with MAX30001
+ *  SPI spi(SPI0_MOSI, SPI0_MISO, SPI0_SCK, SPI0_SS); // used by MAX30001
+ * 
+ * /// PMIC
+ * MAX14720 max14720(&i2c2, MAX14720_I2C_SLAVE_ADDR);
+ * /// Optical Oximeter
+ * MAX30101 max30101(&i2c2, MAX30101_I2C_SLAVE_ADDR);
+ * InterruptIn max30101_Interrupt(P4_0);
+ * 
+ * //@brief Creating a buffer to hold the data
+ * uint32_t oxiBuffer[BUFFER_LENGTH];
+ * int oxiIndex = 0;
+ * char data_trigger = 0;
+ *  
+ *
+ * //@brief Creates a packet that will be streamed via USB Serial
+ * //@brief the packet created will be inserted into a fifo to be streamed at a later time
+ * //@param id Streaming ID
+ * //@param buffer Pointer to a uint32 array that contains the data to include in the packet
+ * //@param number Number of elements in the buffer
+ * //
+ * void StreamPacketUint32_ex(uint32_t id, uint32_t *buffer, uint32_t number) {
+ *   int i;
+ *   if (id == MAX30101_OXIMETER_DATA + 1) {
+ * 
+ *     for (i = 0; i < number; i++) {
+ *       oxiBuffer[oxiIndex] = buffer[i];
+ *       oxiIndex++;
+ *           
+ *       if (oxiIndex > BUFFER_LENGTH)
+ *         {
+ *         data_trigger = 1;
+ *         oxiIndex = 0;
+ *         }
+ *     }
+ *   }
+ * }
+ * 
+ * int main() {
+ *   // hold results for returning functions
+ *   int result;
+ * 
+ *   // initialize HVOUT on the MAX14720 PMIC
+ *   result = max14720.init();
+ *   if (result == MAX14720_ERROR){
+ *     printf("Error initializing MAX14720");
+ *     }
+ *   max14720.boostEn = MAX14720::BOOST_ENABLED;
+ *   max14720.boostSetVoltage(HVOUT_VOLTAGE);
+ * 
+ *   // MAX30101 initialize interrupt
+ *   max30101.onDataAvailable(&StreamPacketUint32_ex);
+ *   max30101_Interrupt.fall(&MAX30101::MAX30101MidIntHandler);
+ *   
+ *   // This is the HR mode only (IR LED only)  
+ *   max30101.HRmode_init(FIFO_WATERLEVEL_MARK, SAMPLE_AVG, SAMPLE_RATE,PULSE_WIDTH, RED_LED_CURRENT); 
+ * 
+ *   printf("Please wait for data to start streaming\n");
+ *   fflush(stdout);
+ *   
+ *   while (1) {
+ *     if(data_trigger == 1)
+ *      {
+ *       printf("%ld ", oxiBuffer[oxiIndex]);  // Print the ECG data on a serial port terminal software
+ *       fflush(stdout);
+ *      }
+ *   } 
+ * }
+ * @endcode
+ *
+ */
+
+#ifndef _MAX30101_H_
+#define _MAX30101_H_
+
+#include "mbed.h"
+
+#define MAX30101_RAW_DATA_SIZE 3 * 4 * 32
+#define MAX30101_PROC_DATA_SIZE 4 * 32
+
+#define MAX30101_OXIMETER_DATA 0x10
+
+#define CHUNK_SIZE 252
+
+///< MAX30101 Register addresses
+
+#define MAX30101_INT_PORT 4
+#define MAX30101_INT_PIN 0
+#define MAX30101_MASTER_NUM 2
+
+/**
+* Maxim Integrated MAX30101 Oximeter chip
+*/
+class MAX30101 {
+public:
+  float max30101_final_temp;                         ///< Global declaration
+  uint32_t max30101_buffer[MAX30101_PROC_DATA_SIZE]; ///< final Processed data
+  char max30101_rawData[MAX30101_RAW_DATA_SIZE];     ///<  raw data from the chip
+
+  typedef enum { ///< MAX30101 Register addresses
+
+    ///< Status
+    REG_INT_STAT_1 = 0x00,
+    REG_INT_STAT_2 = 0x01,
+    REG_INT_EN_1   = 0x02,
+    REG_INT_EN_2   = 0x03,
+
+    REG_FIFO_W_PTR   = 0x04,
+    REG_FIFO_OVF_CNT = 0x05,
+    REG_FIFO_R_PTR   = 0x06,
+    REG_FIFO_DATA    = 0x07,
+    ///< Configuration
+    REG_FIFO_CFG  = 0x08,
+    REG_MODE_CFG  = 0x09,
+    REG_SPO2_CFG  = 0x0A,
+    REG_LED1_PA   = 0x0C,
+    REG_LED2_PA   = 0x0D,
+    REG_LED3_PA   = 0x0E,
+    REG_PILOT_PA  = 0x10,
+    REG_SLT2_SLT1 = 0x11,
+    REG_SLT4_SLT3 = 0x12,
+    ///< Die Temp
+    REG_TINT    = 0x1F,
+    REG_TFRAC   = 0x20,
+    REG_TEMP_EN = 0x21,
+    ///< Proximity Func
+    REG_PROX_INT_THR = 0x30,
+    /* Part ID        */
+    REG_REV_ID = 0xFE,
+    REG_ID     = 0xFF,
+  } MAX30101_REG_map_t;
+
+  /**********/
+  /* STATUS */
+  /**********/
+  /// @brief STATUS1 (0x00)
+  typedef union max30101_Interrupt_Status_1_reg {
+    char all;
+    struct {
+      char pwr_rdy  : 1;
+      char reserved : 3;
+      char prox_int : 1;
+      char alc_ovf  : 1;
+      char ppg_rdy  : 1;
+      char a_full   : 1;
+    } bit;
+  } max30101_Interrupt_Status_1_t;
+
+  /// @brief STATUS2 (0x01)
+  typedef union max30101_Interrupt_Status_2_reg {
+    char all;
+    struct {
+      char reserved1    : 1;
+      char die_temp_rdy : 1;
+      char reserved2    : 6;
+    } bit;
+  } max30101_Interrupt_Status_2_t;
+
+  /// @brief INTERRUPT_ENABLE1 (0x02)
+  typedef union max30101_Interrupt_Enable_1_reg {
+    char all;
+    struct {
+      char reserved1   : 4;
+      char prox_int_en : 1;
+      char alc_ovf_en  : 1;
+      char ppg_rdy_en  : 1;
+      char a_full_en   : 1;
+    } bit;
+  } max30101_Interrupt_Enable_1_t;
+
+  /// @brief INTERRUPT_ENABLE2 (0x03)
+  typedef union max30101_Interrupt_Enable_2_reg {
+    char all;
+    struct {
+      char reserved1       : 1;
+      char die_temp_rdy_en : 1;
+      char reserved2       : 6;
+    } bit;
+  } max30101_Interrupt_Enable_2_t;
+
+  /*********/
+  /* FIFO  */
+  /*********/
+  // 0x04
+  /// @brief FIFO_WR_PTR (0x04)
+  typedef union max30101_fifo_wr_ptr_reg {
+    char all;
+    struct {
+      char fifo_wr_ptr : 5;
+      char reserved1   : 3;
+    } bit;
+  } max30101_fifo_wr_ptr_t;
+
+  /// @brief OVF_COUNTER (0x05)
+  typedef union max30101_ovf_counter_reg {
+    char all;
+    struct {
+      char fifo_ovf_counter : 5;
+      char reserved1        : 3;
+    } bit;
+  } max30101_ovf_counter_reg_t;
+
+  /// @brief FIFO_READ_PTR (0x06)
+  typedef union max30101_fifo_rd_ptr_reg {
+    char all;
+    struct {
+      char fifo_rd_ptr : 5;
+      char reserved1   : 3;
+    } bit;
+  } max30101_fifo_rd_ptr_t;
+
+  /********************/
+  /* Configuration    */
+  /********************/
+  // 0x08
+  /// @brief FIFO_CONFIGURATION (0x08)
+  typedef union max30101_fifo_configuration_reg {
+    char all;
+    struct {
+      char fifo_a_full       : 4;
+      char fifo_roll_over_en : 1;
+      char smp_ave           : 3;
+    } bit;
+  } max30101_fifo_configuration_t;
+
+  /// @brief MODE_CONFIGURATION (0x09)
+  typedef union max30101_mode_configuration_reg {
+    char all;
+    struct {
+      char mode      : 3;
+      char reserved1 : 3;
+      char reset     : 1;
+      char shdn      : 1;
+    } bit;
+  } max30101_mode_configuration_t;
+
+  /// @brief SPO2_CONGIGURATION (0x0A)
+  typedef union max30101_spo2_configuration_reg {
+    char all;
+    struct {
+      char led_pw       : 2;
+      char spo2_sr      : 3;
+      char spo2_adc_rge : 2;
+      char reserved1    : 1;
+    } bit;
+  } max30101_spo2_configuration_t;
+
+  typedef union max30101_multiLED_mode_ctrl_1_reg {
+    char all;
+    struct {
+      char slot1     : 3;
+      char reserved  : 1;
+      char slot2     : 3;
+      char reserved1 : 1;
+    } bit;
+  } max30101_multiLED_mode_ctrl_1_t;
+
+  typedef union max30101_multiLED_mode_ctrl_2_reg {
+    char all;
+    struct {
+      char slot3     : 3;
+      char reserved  : 1;
+      char slot4     : 3;
+      char reserved1 : 1;
+    } bit;
+  } max30101_multiLED_mode_ctrl_2_t;
+
+  /********************/
+  /* Die Temperature  */
+  /********************/
+
+  char max30101_tinit;
+
+  char max30101_tfrac;
+
+  typedef union max30101_die_temp_config {
+    char all;
+    struct {
+      char temp_en  : 1;
+      char reserved : 7;
+    } bit;
+  } max30101_die_temp_config_t;
+
+  /***** Function Prototypes *****/
+
+  char max30101_prox_int_thresh;
+
+  /**
+  * @brief MAX30101 constructor.
+  * @param sda mbed pin to use for SDA line of I2C interface.
+  * @param scl mbed pin to use for SCL line of I2C interface.
+  */
+  MAX30101(PinName sda, PinName scl, int slaveAddress);
+
+  /**
+  * @brief MAX30101 constructor.
+  * @param i2c I2C object to use.
+  */
+  MAX30101(I2C *i2c, int slaveAddress);
+
+  /**
+  * @brief MAX30101 destructor.
+  */
+  ~MAX30101(void);
+
+  /**
+   * @brief Allows reading from MAX30101 register
+   * @param reg: is the register address, to read from (look at max30101.h and the
+   *             data sheet for details)
+   * @param value: is the pointer to the value read from the register
+   * @returns  0-if no error.  A non-zero value indicates an error.
+   */
+  int i2c_reg_read(MAX30101_REG_map_t reg, char *value);
+
+  /**
+   * @brief Allows writing to MAX30101 register
+   * @param reg: is the register address, to read from (look at max30101.h and
+   * the data sheet for details)
+   * @param value: is the value to write to the register
+   * @returns  0-if if no error.  A non-zero value indicates an error.
+   */
+  int i2c_reg_write(MAX30101_REG_map_t reg, char value);
+
+  /**
+   * @brief This function sets up for the SpO2 mode.  The data is returned in
+   * the callback function
+   * @brief max30101_int_handler in global array: buffer[].  SP mode handles two LED (Red,IR) data.  Hence it
+   * @brief can fill up the FIFO up to a maximum of 3bytes/sample x 32 x 2 = 192bytes.
+   * @param fifo_waterlevel_mark: corresponds to FIFO_A_FULL, In FIFO Configuration Register (0x08)
+   * @param sample_avg: corresponds to SMP_AVE, in FIFO Configuration Register (0x08)
+   * @param sample_rate: corresponds to SPO2_SR, IN SpO2 Configuration Register (0x0A)
+   * @param pulse_width: corresponds to LED_PW in SpO2 Configuration register(0x0A)
+   * @param red_led_current: corresponds to LED1_PA register (0x0C).  Please see data sheet for values
+   * @param ir_led_current: corresponds to LED2_PA register (0x0D).  Please see data sheet for values
+   * @returns 0-if everything is good.  A non-zero value indicates an error.
+   */
+  int SpO2mode_init(uint8_t fifo_waterlevel_mark, uint8_t sample_avg,
+                    uint8_t sample_rate, uint8_t pulse_width,
+                    uint8_t red_led_current, uint8_t ir_led_current);
+
+  /**
+   * @brief This function will stop the SpO2 mode and turn off all operating LED�s.
+   * @return  0-if if no error.  A non-zero value indicates an error.
+   */
+  int SpO2mode_stop(void);
+
+  /**
+   * @brief This function sets up for the HR mode.  The data is returned in thecallback function
+   * @brief max30101_int_handler in global array: buffer[].HR mode handles one LED (Red) data.  Hence it can fill
+   * @brief up the FIFO up to a maximum of 3bytes/sample x 32 = 96bytes.
+   * @brief fifo_waterlevel_mark: corresponds to FIFO_A_FULL, In FIFO Configuration Register (0x08)
+   * @param sample_avg: corresponds to SMP_AVE, in FIFO Configuration Register (0x08)
+   * @param sample_rate:corresponds to SPO2_SR, IN SpO2 Configuration Register (0x0A)
+   * @param pulse_width: corresponds to LED_PW in SpO2 Configuration Register(0x0A)
+   * @param red_led_current: corresponds to LED1_PA register (0x0C).  Please see data sheet for values
+   * @returns  0-if if no error.  A non-zero value indicates an error.
+   */
+  int HRmode_init(uint8_t fifo_waterlevel_mark, uint8_t sample_avg,
+                  uint8_t sample_rate, uint8_t pulse_width,
+                  uint8_t red_led_current);
+
+  /**
+   * @brief This function will stop the HR mode and turn off all operating
+   * LED’s.
+   * @return  0-if if no error.  A non-zero value indicates an error.
+   */
+  int HRmode_stop(void);
+
+  /**
+   *@brief This function sets up for the Multi-mode.  The data is returned in the callback function max30101_int_handler in global array:
+   *@brief buffer[].  Multi-LED mode can handle 1 to 4 LED combinations.  Hence it can fill up the FIFO up to a maximum of
+   *@brief 3bytes/sample x 32 x 4 = 384bytes.
+   *@param fifo_waterlevel_mark: corresponds to FIFO_A_FULL, In FIFO Configuration Register (0x08)
+   *@param sample_avg: corresponds to SMP_AVE, in FIFO Configuration Register (0x08)
+   *@param sample_rate:corresponds to SPO2_SR, IN SpO2 Configuration Register (0x0A)
+   *@param pulse_width: corresponds to LED_PW in SpO2 Configuration register(0x0A)
+   *@param red_led_current: corresponds to LED1_PA register (0x0C).  Please see data sheet for values
+   *@param ir_led_current: corresponds to LED2_PA register (0x0D).  Please see data sheet for values
+   *@param green_led_current: corresponds to LED3_PA register (0x0E).  Please see data sheet for values
+   *@param slot_1,…,slot_4: corresponds to Multi-LED Mode control Registers (0x11-0x12).
+   *@returns  0-if if no error.  A non-zero value indicates an error.
+   */
+  int Multimode_init(uint8_t fifo_waterlevel_mark, uint8_t sample_avg,
+                     uint8_t sample_rate, uint8_t pulse_width,
+                     uint8_t red_led_current, uint8_t ir_led_current,
+                     uint8_t green_led_current, uint8_t slot_1, uint8_t slot_2,
+                     uint8_t slot_3, uint8_t slot_4);
+
+  /**
+   * @brief This function will stop the Multi-mode and turn off all operating LED’s.
+   * @returns  0-if if no error.  A non-zero value indicates an error.
+   */
+  int Multimode_stop(void);
+
+  /**
+   * @brief This is a function that sets up for temperature read and should be called after one of the mode
+   * @brief has been setup.  The data is returned in the callback function max30101_int_handler.  This
+   * @brief function needs to be called every time temperature reading is required.
+   * @brief Call the temp function after one of the MODES have been started
+   * @brief Note that the temp is disabled after one read... also, it is not necessary
+   * @brief to read the temp frequently...
+   * @returns  0-if if no error.  A non-zero value indicates an error.
+   */
+  int tempread(void);
+
+  /**
+   *@brief This is a callback function which collects the data from the FIFO of the MAX30101 in a 32-bit
+   *@brief unsigned global array called max30101_buffer[].  Upon every interrupt from the MAX30101, this
+   *@brief function is called to service the FIFO of the MAX30101.  This callback function also services the
+   *@brief interrupt for the temp data.  The temp data is collected in a floating point global variable
+   *@brief final_temp.
+   *@param max30101_buffer[], global uint32_t
+   *@returns  0-if everything is good.  A non-zero value indicates an error.
+   */
+  int int_handler(void);
+  
+   /**
+  * @brief encapsulates the int_handler above
+  */
+  static void MidIntHandler(void);
+  
+  /**
+  * @brief type definition for data interrupt
+  */
+  typedef void (*DataCallbackFunction)(uint32_t id, uint32_t *buffer,
+                                       uint32_t length);
+  /**
+  * @brief type definition for general interrupt
+  */
+  typedef void (*InterruptFunction)();
+
+  /**
+  * @brief Used to connect a callback for when interrupt data is available
+  */
+  void onInterrupt(InterruptFunction _onInterrupt);
+
+  /**
+  * @brief Used to connect a callback for when interrupt data is available
+  */
+  void onDataAvailable(DataCallbackFunction _onDataAvailable);
+
+  static MAX30101 *instance;
+
+private:
+  /**
+   * @brief Used to notify an external function that interrupt data is available
+   * @param id type of data available
+   * @param buffer 32-bit buffer that points to the data
+   * @param length length of 32-bit elements available
+   */
+  void dataAvailable(uint32_t id, uint32_t *buffer, uint32_t length);
+
+
+  /**
+   * @brief Executed on interrupt (callback function at the end of the interrupt)
+   * @param id type of data available
+   * @param buffer 32-bit buffer that points to the data
+   * @param length length of 32-bit elements available
+   */
+  void interruptPostCallback(void);
+
+  /// callback function when interrupt data is available
+  DataCallbackFunction onDataAvailableCallback;
+
+  /// callback function when interrupt data is available
+  InterruptFunction onInterruptCallback;
+
+  /**
+   * @brief Read from an I2C device (Read I2c wrapper method)
+   * @param slaveAddress slave address to use with transaction
+   * @param writeData pointer of data to write
+   * @param writeCount number of data to write
+   * @param readData pointer to buffer to read to
+   * @param readCount number of bytes to read
+   */
+
+  int I2CM_Read(int slaveAddress, char *writeData, char writeCount, char *readData, char readCount);
+  
+  /**
+   * @brief Write to an I2C device (I2C wrapper method)
+   * @param slaveAddress slave address to use with transaction
+   * @param writeData1 pointer of data to write
+   * @param writeCount1 number of data to write
+   * @param writeData2 pointer to buffer to read to
+   * @param writeCount2 number of bytes to read
+   */
+  int I2CM_Write(int slaveAddress, char *writeData1, char writeCount1, char *writeData2, char writeCount2);
+
+  /// @brief pointer to I2C object
+  I2C *i2c;
+
+  /// @brief flag to track if this object is the owner (created) the I2C object
+  bool i2c_owner;
+
+  /// @brief Device slave address
+  int slaveAddress;
+};
+
+  /**
+   *  @brief Resets the I2C block, when needed
+   */
+extern void I2CM_Init_Reset(uint8_t index, int speed);
+
+
+
+#endif /* _MAX30101_H_ */