Calibration SAADC on a Zigbee divice (NRF52840)

[Litvinus]

Hi!

There is an end device that measures the temperature. If I calibrate the ADC during initialization or immediately after startup, the program hangs. If I start the calibration after some time (I do it every 20 measurements, but I start with 19 and so on 19, 39, 58 ...), then everything is fine.
calibration code from here: github.com/.../main.c

[Marte Myrvold]

Hi,

Does it fail during initialization or after startup of the Zigbee stack, or the ADC? It is possible that the timer is blocking the Zigbee stack, causing the program to hang. When do you calibrate it?

Best regards,

Marte

[Litvinus]

Hi, 

My mistake, I didn't read the manual, I just used the code from the example. To stop the SAADC before calibration, the priority of the interrupt from which the stop is called must be lower than the priority of the SAADC.

Thanks!