VL53L3 TOF Sensor Ranging Issues

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Hello ST team, I have established communication with the TOF while using the Full library（The example file used is STSW-IMG015 VL53L3CX_BareDriver_1.2.10.） of VL53L3, and I successfully read the ID (which should prove that my I2C communication is normal). However, no matter what I do, I cannot obtain the ranging data. After studying the example program, I realized that I did not connect the interrupt line in my hardware setup (I’m not sure if this is the cause of the issue).My system's power supply is 2.8V.

I don’t want to use the interrupt pin to control or retrieve the TOF’s status, as it would occupy an IO port on the MCU.

Below are my initialization function, Read function, and the data printed via the serial port. This issue has been troubling me for days, and I really don’t know how to resolve it.Wishing you a happy day.

void VL53LX_Nomal_init(void)
{
	VL53LX_Dev_t ndev;
	VL53LX_DEV Dev = &ndev;
	uint64_t byteData;
  uint16_t wordData;
	uint8_t status;
	Dev->I2cHandle = &hi2c1;
  Dev->I2cDevAddr = 0x52;
	I2C1_Scan(&hi2c1);
 // printf("VL53LX Model_ID: %llu\n\r", byteData);
//  VL53LX_RdByte(Dev, 0x0110, &byteData);
//  printf("VL53LX Module_Type: %02X\n\r", byteData);
  VL53LX_RdWord(Dev, 0x010F, &wordData);
  printf("VL53LX: %02X\n\r", wordData);
	osDelay(200);
	if (HAL_I2C_IsDeviceReady(&hi2c1, 0x52, 1, 10) == HAL_OK) 
		xSemaphoreGive(TOF_init_OKHandle),printf("OK\r\n");//证明能识别到TOF
	
	status = VL53LX_WaitDeviceBooted(Dev);
		if(status){
    printf("1VL53LX_StartMeasurement failed: error = %d \r\n", status);
  }
		
	status = VL53LX_DataInit(Dev);
		if(status){
    printf("2VL53LX_StartMeasurement failed: error = %d \r\n", status);
  }
		
//	status = VL53LX_set_tuning_parm(Dev, VL53LX_TUNINGPARM_RESET_MERGE_THRESHOLD,15000);
//	if(status){
//    printf("3VL53LX_StartMeasurement failed: error = %d \r\n", status);
//  }
//	status = VL53LX_set_tuning_parm(Dev, VL53LX_TUNINGPARM_PHASECAL_PATCH_POWER,0);
//			if(status){
//    printf("4VL53LX_StartMeasurement failed: error = %d \r\n", status);
//  }
	
//	status = VL53LX_SetDistanceMode(Dev, VL53LX_DISTANCEMODE_LONG);
//	if(status){
//    printf("5VL53LX_StartMeasurement failed: error = %d \r\n", status);
//  }
//	status = VL53LX_SetDistanceMode(Dev, VL53LX_DISTANCEMODE_LONG);
//	status = VL53LX_SetMeasurementTimingBudgetMicroSeconds(Dev, 100000);
	status = VL53LX_StartMeasurement(Dev);
	if(status){
    printf("6VL53LX_StartMeasurement failed: error = %d \r\n", status);
  }
}

void VL53L3CX_Nomal_Read(void)
{
	VL53LX_Dev_t ndev;
	VL53LX_DEV Dev = &ndev;
	Dev->I2cHandle = &hi2c1;
  Dev->I2cDevAddr = 0x52;
	VL53LX_MultiRangingData_t MultiRangingData;
  VL53LX_MultiRangingData_t *pMultiRangingData = &MultiRangingData;
  uint8_t NewDataReady=0;
  int no_of_object_found=0,j;
	int status;
	//status = VL53LX_StartMeasurement(Dev);
	osDelay(1000);
//	status = VL53LX_GetMultiRangingData(Dev, &MultiRangingData);
//	osDelay(1);
//			if(status){
//    printf("VL53LX_StartMeasurement failed: error = %d \r\n", status);
//  }
//	status = VL53LX_ClearInterruptAndStartMeasurement(Dev);
		//do_output(MultiRangingData.RangeData[0].RangeMilliMeter);
	status = VL53LX_GetMeasurementDataReady(Dev, &NewDataReady);   
	printf("status:%d NewDataReady:%d\r\n",status,NewDataReady);
	osDelay(1000); // 1 ms polling period, could be longer.
	if((!status)&&(NewDataReady!=0))
		{
		status = VL53LX_GetMultiRangingData(Dev, pMultiRangingData);
		printf("status:%d\r\n",status);
		no_of_object_found=pMultiRangingData->NumberOfObjectsFound;
		printf("Count=%5d, ", pMultiRangingData->StreamCount);
		printf("#Objs=%1d ", no_of_object_found);
		for(j=0;j<no_of_object_found;j++){
			if(j!=0)printf("\n                     ");
			printf("status=%d, D=%5dmm, Signal=%2.2f Mcps, Ambient=%2.2f Mcps",
						 pMultiRangingData->RangeData[j].RangeStatus,
						 pMultiRangingData->RangeData[j].RangeMilliMeter,
						 pMultiRangingData->RangeData[j].SignalRateRtnMegaCps/65536.0,
						 pMultiRangingData->RangeData[j].AmbientRateRtnMegaCps/65536.0);
		}
		printf ("\n");
		if (status==0){
			status = VL53LX_ClearInterruptAndStartMeasurement(Dev);
		}
	}
}
	

My usart data:

VL53LX: EAAA
OK
Init TOF
status:0 NewDataReady:1
status:0
Count= 0, #Objs=1 status=255, D= 0mm, Signal=511.99 Mcps, Ambient=511.99 Mcpsstatus:0 NewDataReady:1
status:0
Count= 0, #Objs=1 status=255, D= 0mm, Signal=511.99 Mcps, Ambient=511.99 Mcpsstatus:0 NewDataReady:1
status:0
Count= 0, #Objs=1 status=255, D= 0mm, Signal=511.99 Mcps, Ambient=511.99 Mcpsstatus:0 NewDataReady:1

[John E KVAM]

Is 

VL53L3CX_Nomal_Read

In the same file as your main.c?

I'm going to guess, that you have two different Dev structures and the one you used to do the init, is not the same one as you are using when you do the read. 

That data structure is huge, and it contains a lot of stuff we hide away. (Way too much in my opinion.) 

Can you make that data structure global and extern it in your read function?