VL53L1_ERROR_ZONE_GPH_ID_CHECK_FAIL

[User.120]

We found a problem with VL53L1CB, After VL53L1_GetMeasurementDataReady returns 0, VL53L1_GetMultiRangingData returns VL53L1_ERROR_ZONE_GPH_ID_CHECK_FAIL. What causes this problem?

Thank anyone for a little help

[John E KVAM]

I think you want VL53L1_GetMeasurementDataReady to return a 1 to indicated that a measurement was ready. 

I believe that error will go away once the measurement is actually ready. Although I did not find any useful references to it in the code. (There is just the function that translates the error to a string - which is not really helpful.)

Try starting the sensor and waiting a good long (At least whatever you have set for Timing Budget) time before calling VL53L1_GetMeasurementDataReady. You will know the sensor has finished, and you will know what VL53L1_GetMeasurementDataReady is supposed to return when done.

- john

[User.120]

Thank you very much for your response.

VL53L1_GetMultiRangingData(VL53L1_DEV Dev, VL53L1_MultiRangingData_t *pMultiRangingData) *pMultiRangingData in this function returns 1, I also waited until *pMultiRangingData was 1 before executing VL53L1_GetMultiRangingData. So I don't know why this result is returned.

In addition, I want to determine whether the ranging performance under the drive of STSW-IMG019 is LONG>MEDIUM>SHORT. I see MEDIUM>LONG>SHORT in um2133, and the actual test is LONG>MEDIUM>SHORT.

Thank anyone for a little help

[Zhiyuan.Han]

Hi 

About the code sequence, I attach the example code here, you need to check NewDataReady with VL53L1_GetMeasurementDataReady(), if the NewDataReady return 1, that means ranging data ready, and you can read the ranging data VL53L1_GetMultiRangingData().

    do{ // polling mode
      status = VL53L1_GetMeasurementDataReady(Dev, &NewDataReady);
      HAL_Delay(1);
      if((!status)&&(NewDataReady!=0)){
        status = VL53L1_GetMultiRangingData(Dev, pMultiRangingData);
        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 = VL53L1_ClearInterruptAndStartMeasurement(Dev);
        }
      }
    }
    while (1);

Br

Zhiyuan.Han