SAADC reading and transmiting over BLE_APP_UAR while in connected mode

[Chocol8]

Hello,

My setup is pca10040, sdk 14.2, s132.

I have tried firstly the blocking mode function and it is not reacting. After that I used SAADC module in a non blocking mode. I use code part from proximity example. On every button press GPIOTE port event calls SAADC initialization, reading SAADC, uninitializing. This works fine except while advertising over BLE or connected mode. saadc_event_handler is not called when connected or advertising. What can be the problem here?  

 

void DIGITAL_PRESS_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action) 
{
	
	if(nrf_gpio_pin_read(BUTTON_1) == BUTTONS_ACTIVE_STATE)
	{
			button press = 8;
			
            peripherals_init();
			
	}


void saadc_event_handler(nrf_drv_saadc_evt_t const * p_event)
{
    if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
    {
        uint16_t          batt_lvl_in_milli_volts;
        uint8_t           percentage_batt_lvl;
        uint32_t          err_code;

        adc_result = p_event->data.done.p_buffer[0];

        err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, 1);
        APP_ERROR_CHECK(err_code);

        batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_result) +
                                  DIODE_FWD_VOLT_DROP_MILLIVOLTS;
        percentage_batt_lvl = battery_level_in_percent(batt_lvl_in_milli_volts);

    }
}

void saadc_init(void)
{
    ret_code_t err_code = nrf_drv_saadc_init(NULL, saadc_event_handler);
    APP_ERROR_CHECK(err_code);

    nrf_saadc_channel_config_t config =
        NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_AIN0);
    err_code = nrf_drv_saadc_channel_init(0, &config);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(&adc_buf[0], 1);
    APP_ERROR_CHECK(err_code);

}

void peripherals_init(void)
{
	ret_code_t err_code;
	saadc_init();
	err_code = nrf_drv_saadc_sample();
    APP_ERROR_CHECK(err_code);
}

void peripherals_UNinit(void)
{

	nrf_drv_saadc_uninit();
	NRF_SAADC->INTENCLR = (SAADC_INTENCLR_END_Clear << SAADC_INTENCLR_END_Pos);
    NVIC_ClearPendingIRQ(SAADC_IRQn);
}

I perceive that code jumps on button press connected, advertising to  err_code = nrf_drv_saadc_sample(); and in there to  nrf_saadc_task_trigger(NRF_SAADC_TASK_SAMPLE); after this I do not receive any callback in saadc_event_handler. 

[Chocol8]

I have decided to use blocking mode function. Hoever, I noticed that in order to initialize that function every time before reading I must not use calibration function if I am in connection mode. Therefore I use calibration only when not advertising, nor in connection.