Sample application, using the X_Nucleo_53L0A1 library, to display range results from the X-NUCLEO-53L0A1 central sensor on the 4-digit LED display.

Dependencies:   X_NUCLEO_53L0A1 mbed

Files at this revision

API Documentation at this revision

Comitter:
johnAlexander
Date:
Fri Jun 09 07:21:19 2017 +0000
Commit message:
Sample application, using the X_Nucleo_53L0A1 library, to display range results from the central sensor of X-NUCLEO-53L0A1 board on the 4-digit LED display.

Changed in this revision

X_NUCLEO_53L0A1.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file
diff -r 000000000000 -r cd8e818d4288 X_NUCLEO_53L0A1.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/X_NUCLEO_53L0A1.lib	Fri Jun 09 07:21:19 2017 +0000
@@ -0,0 +1,1 @@
+https://developer.mbed.org/teams/ST/code/X_NUCLEO_53L0A1/#faf8d62ce6d1
diff -r 000000000000 -r cd8e818d4288 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jun 09 07:21:19 2017 +0000
@@ -0,0 +1,113 @@
+#include "mbed.h"
+#include "x_nucleo_53l0a1.h"
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+
+/* This VL53L0X Expansion board test application performs a range measurement in polling mode
+   on the onboard embedded top sensor. 
+   The measured data is displayed on the on-board 4-digit display.
+
+   User Blue button stops the current measurement and the entire program, releasing all resources.
+   Reset button is used to restart the program. */
+
+/* Polling operating modes don`t require callback function that handles IRQ 
+   Callback IRQ functions are used only for measure that require interrupt */
+
+/* GetMeasurement is asynchronous! It returns NOT_READY if the measurement value 
+   is not ready to be read from the corresponding register. So you need to wait
+   for the result to be ready */
+
+#define VL53L0_I2C_SDA   D14 
+#define VL53L0_I2C_SCL   D15 
+
+#define RANGE   0
+
+static X_NUCLEO_53L0A1 *board=NULL;
+VL53L0X_RangingMeasurementData_t data_sensor_centre;
+OperatingMode operating_mode;
+    
+/* flags that handle interrupt request */
+bool int_sensor_centre=false, int_stop_measure=false;   
+
+/* ISR callback function of the sensor_centre */
+void SensorTopIRQ(void)
+{
+   int_sensor_centre=true;
+   board->sensor_centre->DisableInterruptMeasureDetectionIRQ();
+}   
+
+/* ISR callback function of the user blue button to stop program */
+void StopMeasureIRQ(void)
+{
+   int_stop_measure=true;
+}
+
+/* On board 4 digit local display refresh */
+void DisplayRefresh(OperatingMode op_mode)
+{   
+   char str[5];
+   
+   if (op_mode==range_single_shot_polling || op_mode==range_continuous_interrupt || op_mode==range_continuous_polling)
+   {
+      if (data_sensor_centre.RangeStatus == 0) // we have a valid range.
+      {
+         sprintf(str,"%d",data_sensor_centre.RangeMilliMeter);
+      }
+      else
+      {
+         sprintf(str,"%s","----");
+      }
+   }
+     
+   board->display->DisplayString(str);
+}
+
+void RangeMeasure(DevI2C *device_i2c) {
+   int status;
+
+   /* creates the 53L0A1 expansion board singleton obj */
+   board=X_NUCLEO_53L0A1::Instance(device_i2c, A2, D8, D2);
+    
+   board->display->DisplayString("53L0");
+   /* init the 53L0A1 expansion board with default values */
+   status=board->InitBoard();
+   if(status)
+      printf("Failed to init board!\n\r");   
+   operating_mode=range_single_shot_polling;
+   /* start the measure on sensor top */
+   status=board->sensor_centre->StartMeasurement(operating_mode, SensorTopIRQ);
+   if(!status)
+   {
+      while(1)
+      {
+         status=board->sensor_centre->GetMeasurement(operating_mode, &data_sensor_centre);
+         DisplayRefresh(operating_mode);
+         if(int_stop_measure) // Blue Button isr was triggered
+         {
+            status=board->sensor_centre->StopMeasurement(operating_mode); // stop the measure and exit
+            int_stop_measure = false;
+            printf("\nProgram stopped!\n\n\r");
+            break;
+         }
+      }
+   }
+   board->display->DisplayString("BYE");
+   delete board;        
+}    
+
+/*=================================== Main ==================================
+ Press the blue user button to stop the measurements in progress    
+=============================================================================*/
+int main()
+{   
+#if USER_BUTTON==PC_13  // we are cross compiling for Nucleo-f401 
+   InterruptIn stop_button (USER_BUTTON);
+   stop_button.rise (&StopMeasureIRQ);  
+#endif   
+   DevI2C *device_i2c =new DevI2C(VL53L0_I2C_SDA, VL53L0_I2C_SCL);     
+        
+   RangeMeasure(device_i2c);  // start continuous measures
+}
+
diff -r 000000000000 -r cd8e818d4288 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Fri Jun 09 07:21:19 2017 +0000
@@ -0,0 +1,1 @@
+https://mbed.org/users/mbed_official/code/mbed/builds/0f02307a0877
\ No newline at end of file