File content as of revision 0:ce8359133ae6:

#include "mbed.h"
#include "x_nucleo_53l0a1.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>

/* This VL6180X Expansion board test application performs a range measurement and an als measurement in interrupt mode
   on the onboard embedded top sensor. 
   The board red slider select on the flight the measurement type as ALS or RANGE; the measured data is diplayed on the 
   on bord 4digits display.

   User Blue button allows to stop current measurement and the entire program releasing all the 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, prev_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;
}
#define DELAY 100  // 100ms
/* On board 4 digit local display refresh */
void DisplayRefresh(OperatingMode op_mode)
{   
   Timer timer;
   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);
/*
   timer.start();
   for(int i=0; i<DELAY; i=timer.read_ms())
   {
   }
   timer.stop();
*/
}

/* Print on USB Serial the started OperatingMode */
/*
void PrintStartMessage(OperatingMode op_mode)
{
   if(op_mode==range_continuous_interrupt)
      printf("\nStarted range continuous interrupt measure\n\r");
}
*/

/* Print on USB Serial the stopped OperatingMode */
/*
void PrintStopMessage(OperatingMode op_mode)
{
   if(op_mode==range_continuous_interrupt)
      printf("Stopped range continuous interrupt measure\n\r");
}
*/
/* Print on board 4 Digit display the indicated message <= 4 char */
//#define DELAY 2000  // 2Sec
/*
void DisplayMsg(const char * msg)
{
   Timer timer;
   char str[5];
   
   timer.start();
   for(int i=0; i<DELAY; i=timer.read_ms())
   {
      sprintf(str,"%s",msg);
      board->display->DisplayString(str);
   }
   timer.stop();
}
*/

void ContinousRangeMeasure(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_continuous_polling;
   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);     
		
   ContinousRangeMeasure(device_i2c);  // start continuous measures
}