How to stop SAADC

RE: How to stop SAADC

haakonsh — Mon, 27 May 2019 14:45:24 GMT

Does it work for your custom board as well?

RE: How to stop SAADC

nahro — Mon, 27 May 2019 14:39:00 GMT

I tested the DK and it works fine. I was not going back to power management after adc i was just waiting for ble events now i use nrf_pwr_mgmt_run() instead of sd_app_evt_wait() and it works great.

RE: How to stop SAADC

haakonsh — Mon, 27 May 2019 14:36:49 GMT

There is a bug with EasyDMA not releasing it's clock source, but it is only present when more than one channel is enabled, the current consumption is then ~1.2mA, also the workaround is to call nrfx_saadc_uninit.

Try this:
NRF_SAADC->ENABLE = 0;

RE: How to stop SAADC

nahro — Mon, 27 May 2019 12:50:24 GMT

Actually i am trying to find my DK, but i think it might be the easyDMA that not stopping because i check nrfx_saadc_is_busy() and it's in idle state but still consuming 2 mA.

RE: How to stop SAADC

haakonsh — Mon, 27 May 2019 12:42:22 GMT

Are you able to reproduce the issue on the DK?