SAADC does not sample

[eBrock]

I'm trying to sample analog input but there is no value after sampling.

I tested the input by configuring it as digital input and it worked correctly.

Below is code. Any help would be greatly appreciated.

// Configure ADC and enable it
void adc_init( void )
{
    NRF_SAADC->CH[0].PSELP = 1;
    NRF_SAADC->CH[0].PSELN = 0;
    NRF_SAADC->CH[0].CONFIG = 0x20010;
    NRF_SAADC->RESOLUTION = 0;
    NRF_SAADC->RESULT.PTR = (uint32_t)adcResult;
    NRF_SAADC->RESULT.MAXCNT = 1;
    nrf_saadc_enable();
    nrf_saadc_task_trigger(NRF_SAADC_TASK_START);
}

int main(void)
{
    // Initialize clock
    clocks_start();
    
    nrf_delay_ms(1);

    // Initialize peripherals
    gpio_init();
    adc_init();

    nrf_gpio_pin_write(LED_1,0);

    nrf_delay_ms(100);

    while (true)
    {
        nrf_saadc_task_trigger(NRF_SAADC_TASK_SAMPLE);
        while (nrf_saadc_event_check(NRF_SAADC_EVENT_DONE) == 0);
        nrf_adc_result = ((uint16_t)*adcResult >> 8) & 0x7F;
        nrf_saadc_event_clear(NRF_SAADC_EVENT_DONE);

        if (nrf_adc_result > 25)
        {
            nrf_gpio_pin_write(LED_2,0);
        }
        else
        {
            nrf_gpio_pin_write(LED_2,1);
        }

        if (nrf_adc_result > 50)
        {
            nrf_gpio_pin_write(LED_3,0);
        }
        else
        {
            nrf_gpio_pin_write(LED_3,1);
        }

        if (nrf_adc_result > 100)
        {
            nrf_gpio_pin_write(LED_4,0);
        }
        else
        {
            nrf_gpio_pin_write(LED_4,1);
        }

        nrf_gpio_pin_toggle(LED_1);
        nrf_delay_ms(250);


    }
}

[Turbo J]

Missing defintition of  "adcResult", which is likely used wrong here.

Note that there is SAADC example code in the SDK.