Not getting data from adc in continuous mode

RE: Not getting data from adc in continuous mode

Karthikbss — Mon, 03 Feb 2020 23:42:47 GMT

Thank you, I got the adc working with status interrupt

RE: Not getting data from adc in continuous mode

Einar Thorsrud — Wed, 29 Jan 2020 07:56:36 GMT

Hi,

[quote user="Karthikbss"] Is there a way to avoid having to sleep and check adc status for event done?[/quote]

Yes, this is typically handled with interrupts. If you want to run some code when sampling has finished, you should enable an interrupt for that event, and process it in the interrupt/event handler. You can see from the documentation for the SAADC INTEN register that you can enable interrupts for the END event.

RE: Not getting data from adc in continuous mode

Karthikbss — Tue, 28 Jan 2020 23:51:48 GMT

My intention is to replace nrf_delay_ms call with a function that performs some task, that function could take less than or greater than one milli second. Once done is there a way to check if adc has completed its task of capturing samples [one set of 200 samples in my case]. Is there a way to avoid having to sleep and check adc status for event done?

I tried to check on "NRF_SAADC_EVENT_END" but that did not work, system would wait for ever on that event.

RE: Not getting data from adc in continuous mode

Einar Thorsrud — Tue, 28 Jan 2020 11:59:31 GMT

Hi,

Looking at your code without the call to nrf_delay_ms() you continue to stop sampling immediately after it has been started, so sampling will not have completed. Why are you stopping it?