RE: SAADC always busy, error 17, cannot calibrate

Ryjan — Wed, 05 Apr 2017 18:37:50 GMT

Thanks Jørgen. I removed one buffer and moved the 'nrf_drv_buffer_convert()' function to the end of the event handler. This has fixed the busy error when attempting to calibrate. My other issue now is with the data in the buffer, but I'm digging through that first.

RE: SAADC always busy, error 17, cannot calibrate

Jørgen Holmefjord — Wed, 05 Apr 2017 13:42:58 GMT

Hi,

The interrupt handler of the SAADC driver will not set the state to IDLE if there is a second buffer setup for conversion. Since you are using double buffering and setup the buffer again before calling the calibration task in the SAADC event handler, the SAADC will never be in IDLE state. This is the reason that you always get the busy return code.

You can try using a single buffered setup.

I will check internally if this is intentional, or if this is a bug in the driver.

Best regards,

Jørgen