File content as of revision 6:19d56b30bfa7:

/*
 * This VL53L1CB Expansion board test application performs range measurements
 * using the onboard embedded sensor, in interrupt mode.
 * Measured ranges are ouput on the Serial Port, running at 115200 baud.
 *
 * This is designed to work with MBed v2.x, & MBedOS v5.x / v6.x.
 *
 * The Reset button can be used to restart the program.
 *
 * *** NOTE :
 *     Default Mbed build system settings disable printf() floating-point support.
 *     Offline builds can enable this, again.
 *     https://github.com/ARMmbed/mbed-os/blob/master/platform/source/minimal-printf/README.md
 *     .\mbed-os\platform\mbed_lib.json
 *
 * *** NOTE : By default hardlinks U10, U11, U15 & U18, on the underside of
 *            the X-NUCELO-53L1A1 expansion board are not made/OFF.
 *            These links must be made to allow interrupts from the Satellite boards
 *            to be received.
 *            U11 and U18 must be made/ON to allow interrupts to be received from the
 *            INT_L & INT_R positions; or
 *            U10 and U15 must be made/ON to allow interrupts to be received from the
 *            Alternate INT_L & INT_R positions.
 *            The X_NUCLEO_53L1A2 library defaults to use the INT_L/INT_R positions.
 *            INT_L is available on expansion board Arduino Connector CN5, pin 1 as D8.
 *            Alternate INT_L is on CN5 Connector pin 2 as D9.
 *            INT_R is available on expansion board Arduino Connector CN9, pin 3 as D2.
 *            Alternate INT_R is on CN9 Connector pin 5 as D4.
 *            The pinouts are shown here : https://developer.mbed.org/components/X-NUCLEO-53L1A2/
 *
 */

#include <stdio.h>
#include <time.h>

#include "mbed.h"

#include "XNucleo53L1A2.h"
#include "ToF_I2C.h"

// i2c comms port pins
#define I2C_SDA   D14
#define I2C_SCL   D15


#define NUM_SENSORS 3

// define interrupt pins
PinName CentreIntPin = A2;
// the satellite pins depend on solder blobs on the back of the shield.
// they may not exist or may be one of two sets.
// the centre pin always exists
PinName LeftIntPin = D8;
PinName RightIntPin = D2;
// alternate set
//PinName LeftIntPin = D9;
//PinName RightIntPin = D4;

static XNucleo53L1A2 *board=NULL;

#if (MBED_VERSION  > 60300)
UnbufferedSerial  pc(USBTX, USBRX);
extern "C" void wait_ms(int ms);
#else
Serial pc(SERIAL_TX, SERIAL_RX);
#endif

void print_results(int devNumber, VL53L1_MultiRangingData_t *pMultiRangingData );


VL53L1_Dev_t devCentre;
VL53L1_DEV Dev = &devCentre;

VL53L1 *Sensor;



/* flags that handle interrupt request for sensor and user blue button*/
volatile bool int_sensor = false;
volatile bool int_stop = false;

/* ISR callback function of the centre sensor */
void sensor_irq(void)
{
    int_sensor = true;
    board->sensor_centre->disable_interrupt_measure_detection_irq();
}

/* Start the sensor ranging */
int init_sensor()
{
    int status = 0;

    Dev=&devCentre;
    Sensor=board->sensor_centre;

    // configure the sensors
    Dev->comms_speed_khz = 400;
    Dev->comms_type = 1;
    Dev->i2c_slave_address = NEW_SENSOR_CENTRE_ADDRESS;

    printf("configuring centre channel \n");

    /* Device Initialization and setting */
    status = Sensor->vl53L1_DataInit();
    status = Sensor->vl53L1_StaticInit();
    status = Sensor->vl53L1_SetPresetMode(VL53L1_PRESETMODE_AUTONOMOUS);
    status = Sensor->vl53L1_SetDistanceMode(VL53L1_DISTANCEMODE_LONG);
    status = Sensor->vl53L1_SetMeasurementTimingBudgetMicroSeconds( 200 * 1000);


    // set the ranging and signal rate filter
    VL53L1_DetectionConfig_t thresholdconfig;

    thresholdconfig.DetectionMode = VL53L1_DETECTION_DISTANCE_ONLY; /// type VL53L1_DetectionMode in vl53l1_def.h
    thresholdconfig.Distance.CrossMode = VL53L1_THRESHOLD_IN_WINDOW; // type VL53L1_ThresholdMode. ignore if distance outside high and low
    thresholdconfig.Distance.High = 300;  // high distance in mm
    thresholdconfig.Distance.Low = 200;   // low distance in mm
    thresholdconfig.Rate.CrossMode=0;  // type VL53L1_ThresholdMode VL53L1_THRESHOLD_CROSSED_LOW VL53L1_THRESHOLD_CROSSED_HIGH VL53L1_THRESHOLD_OUT_OF_WINDOW VL53L1_THRESHOLD_IN_WINDOW
    thresholdconfig.Rate.High = 0;
    thresholdconfig.Rate.Low = 0;
    thresholdconfig.IntrNoTarget = 0 ;// if 1 produce an interrupt even if there is no target found e.g out of range

    status = Sensor->vl53L1_SetThresholdConfig(&thresholdconfig);

    // create interrupt handler and start measurements
    if (board->sensor_centre!= NULL) {
        status = board->sensor_centre->stop_measurement();
        if (status != 0) {
            return status;
        }

        status = board->sensor_centre->start_measurement(&sensor_irq);
        if (status != 0) {
            return status;
        }
    }
    return status;
}

/* ISR callback function of the user blue button to switch measuring sensor. */
void measuring_stop_irq(void)
{
    int_stop = true;
}

/*=================================== Main ==================================
=============================================================================*/
int main()
{
    int status;
    uint16_t distance = 0;

    pc.baud(115200);  // baud rate is important as printf statements take a lot of time

    printf("mbed version : %d \r\n",MBED_VERSION);

// create i2c interface
    ToF_DevI2C *dev_I2C = new ToF_DevI2C(I2C_SDA, I2C_SCL);
    /* creates the 53L1A2 expansion board singleton obj */
    board = XNucleo53L1A2::instance(dev_I2C, CentreIntPin, LeftIntPin, RightIntPin);    

    printf("board created!\r\n");

    /* init the 53L1A1 expansion board with default values */
    status = board->init_board();
    if (status) {
        printf("Failed to init board!\r\n");
        return status;
    }

    printf("board initiated! - %d\r\n", status);

    /* init an array with chars to id the sensors */
    status = init_sensor();
    if (status != 0) {
        printf("Failed to init sensors!\r\n");
        return status;
    }

    printf("loop forever\n");

    VL53L1_MultiRangingData_t MultiRangingData;
    VL53L1_MultiRangingData_t *pMultiRangingData = NULL;

    while (true) {
        pMultiRangingData = &MultiRangingData;

        if (int_sensor) {
            int_sensor = false;
            status = board->sensor_centre->vl53L1_GetMultiRangingData( pMultiRangingData);
            if (status == 0) {
                print_results( devCentre.i2c_slave_address, pMultiRangingData );
            }
            status = board->sensor_centre->VL53L1_ClearInterrupt();
            board->sensor_centre->enable_interrupt_measure_detection_irq();
        }

        if (int_stop) {
            printf("\r\nEnding loop mode \r\n");
            break;
        }
    }

    printf("Terminating.\n");
}


// print what ever results are required
void print_results( int devNumber, VL53L1_MultiRangingData_t *pMultiRangingData )
{
    int no_of_object_found=pMultiRangingData->NumberOfObjectsFound;
    int signal_rate = 0;
    int ambient_rate = 0;

    int RoiNumber=pMultiRangingData->RoiNumber;

    if (( no_of_object_found < 10 ) &&  ( no_of_object_found != 0)) {
        for(int j=0; j<no_of_object_found; j++) {
            if ((pMultiRangingData->RangeData[j].RangeStatus == VL53L1_RANGESTATUS_RANGE_VALID) ||
                    (pMultiRangingData->RangeData[j].RangeStatus == VL53L1_RANGESTATUS_RANGE_VALID_NO_WRAP_CHECK_FAIL)) {
                signal_rate = pMultiRangingData->RangeData[j].SignalRateRtnMegaCps / 65535;
                ambient_rate = pMultiRangingData->RangeData[j].AmbientRateRtnMegaCps / 65535;
                printf("\t i2cAddr=%d \t RoiNumber=%d   \t status=%d, \t D=%5dmm, \t Signal=%d Mcps, \t Ambient=%d Mcps \n",
                       devNumber, RoiNumber,
                       pMultiRangingData->RangeData[j].RangeStatus,
                       pMultiRangingData->RangeData[j].RangeMilliMeter,
                       signal_rate,
                       ambient_rate);
/*
// online compiler disables printf() / floating-point support, for code-size reasons.                        
// offline compiler can switch it on.
                printf("\t i2cAddr=%d \t RoiNumber=%d   \t status=%d, \t D=%5dmm, \t Signal=%2.2f Mcps, \t Ambient=%2.2f Mcps \n",
                       devNumber, RoiNumber,
                       pMultiRangingData->RangeData[j].RangeStatus,
                       pMultiRangingData->RangeData[j].RangeMilliMeter,
                       pMultiRangingData->RangeData[j].SignalRateRtnMegaCps / 65535.0,
                       pMultiRangingData->RangeData[j].AmbientRateRtnMegaCps / 65535.0);
*/                       
            }
        }
    } // if (( no_of_object_found < 10 ) &&  ( no_of_object_found != 0))
}


#if (MBED_VERSION  > 60300)
extern "C" void wait_ms(int ms)
{
    thread_sleep_for(ms);
}
#endif