RE: NRF52810 SAADC buffer swap

Yuta_Sigma — Wed, 29 May 2024 23:59:59 GMT

Hi Sigurd
I appreciate your prompt reply.

I fixed the problem you pointed out.
It now works properly.

The cause was that this location remained as it was in the sample program.
Incidentally, the fact that the data was stored correctly four at a time from cycles 18 to 22 onwards only seemed that way, but does that mean that there could have been a shift at some point?

RE: NRF52810 SAADC buffer swap

Sigurd — Wed, 29 May 2024 14:44:54 GMT

Hi!

I had a quick look at the code.

In saadc_init(), I see you have:

    // double buffering
    err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[0], 1);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[1], 1);
    APP_ERROR_CHECK(err_code);

Try this instead:

    // double buffering
    err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[0], SAMPLES_IN_BUFFER);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[1], SAMPLES_IN_BUFFER);
    APP_ERROR_CHECK(err_code);