VL53L5cx sensor not responding correctly

[DOste.2]

Hello!

I have a VL53L5cx ToF sensor on a X-NUCLEO-53L5A1 shield connected to a Nucleo F401RE and I have run a sample in zephyr and all is okay. I get a successful init and the sensor starts to range correctly:

I now have a custom solution using a STM32F423VHH . and am trying to run the exact same example but I am running to issues. The problem seems to be that the _vl53l5cx_send_offset_data() is not getting the response it expects. This function is called twice - once in vl53l5cx_init() and again in vl53l5cx_set_resolution(). I have attached a logic analyser and have confirmed that the response from the ToF sensor is indeed incorrect, A response of 0x03 0x03 0x00 is expected (as seen below):

 

But I get the following response of 0xF0 0xF0 0xF0 in init():

and 0x54 0x54 0x54 in set_resolution:

 

Do you have any idea of why this is happening? This seems to be the only part that is receiving an incorrect response. If I remove the calls to _vl53l5cx_send_offset_data() then the code runs but obviously the sensor data is not correct and returns a status value of 255 for each call.

Any help would be much appreciated.

David

[Anne BIGOT]

Hello

Did you change/update the platform files and/or the GPIOs configuration on the new board ? They might be not pin to pin compatible ?

It seems the FW has been correctly uploaded (the I2C communication seems then OK) but the FW doesn't respond. It could be an issue with GPIO configuration.