SAADC Scan Mode mixes channel buffers whan fast.

[schef]

Hi, i have a strange problem which happens when i use scan mode to get 3 separate channels on saadc.

For example when i use uint32_t ticks = nrf_drv_timer_us_to_ticks(&m_timer, 200); everytihing is ok but whan i use 50us buffers get mixed up?

Is this possible?

I use nrf52 with sdk 12.2.0

[schef]

Here is what i have now and works for me. Didnt have a crash yet.

I have one saadc_sampling_event_init which has a timer in it. For each channel i have separate callback and saadc_init function.

I have created a function

void saadc_uninit(void)
{
  nrf_drv_saadc_uninit();
}

which i call after the measurement.

So for example one procedure may look like this.

void saadc_battery_level_callback(nrf_drv_saadc_evt_t const * p_event)
{
  if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
  {
    ret_code_t err_code;
    err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, SAMPLES_IN_BUFFER); APP_ERROR_CHECK(err_code);
    //SEGGER_RTT_printf(0, "buffa: %d\n", p_event->data.done.p_buffer[0]);
    battery_level_saadc_value = (uint16_t)caluclate_average_result(p_event->data.done.p_buffer, SAMPLES_IN_BUFFER);
    set_data_ready(true);
  }
}

void battery_channel_enable()
{
  saadc_battery_level_init();
  saadc_sampling_event_enable();
}

void battery_channel_disable()
{
  saadc_sampling_event_disable();
  saadc_uninit();
}

static void wait_for_sample_data()
{
  while(!is_data_ready())
  {
    nrf_delay_ms(1);
    __WFE();
    __SEV();
    __WFE();
    nrf_delay_ms(1);
  }
  set_data_ready(false);
}


uint16_t get_battery_saadc_sample()
{
  battery_channel_enable();
  wait_for_sample_data();
  battery_channel_disable();
  return(battery_level_saadc_value);
}

What do you think about nrf_delay_ms(1);. If i remove them i never got the data_ready.