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VL53V1CB calibration

Fantalucio
Associate

HI,

I am using ULD API function VL53L1X_CalibrateOffset() and VL53L1X_CalibrateXtalk() to calibrate the sensor and then I store the parameters in EEprom and everything works fine: with VL53L1X_GetResult() I can see the distance of the object and when it moves away, the status returns "2 ", then I can ignore the measured distance and assume that there is no object.

The problem is that when I restart the board and send the previously saved calibration parameters with VL53L1X_SetXtalk() and VL53L1X_SetOffset(), the status always returns NO ERROR and an incorrect distance.

I also tried the following procedure from VL53L1X ultra lite driver with the same results.

Any suggestions?

Thanks.
Lucio

Fantalucio_0-1700835373286.png

 

1 REPLY 1
Zhiyuan.Han
ST Employee

Hi Lucio

From 1st half, seems your code is able to range correctly, so I suspect the issue come from wrong calibrate data was set after reboot. 

Can you try to read back the offset and xtalk values to do a comparation with VL53L1X_GetOffset() and VL53L1X_GetXtalk()?

  • one is just after calibration, read out the calibrated value. 
  • the other one after reboot and applied your saved value. 

 

Br

Zhiyuan.Han