GPIOTE+SAADC

[Amit]

Hi, I am facing some issue while working with both GPIOTE and SAADC. I have merged the GPIOTE and SAADC sample example sdk code into a new project but what I am facing is the GPIOTE not getting monitored when SAADC is functions are called.

int main(void)
{
    const uint8_t leds_list[LEDS_NUMBER] = LEDS_LIST;
    LEDS_CONFIGURE(LEDS_MASK);

    gpio_init();

    saadc_sampling_event_init();
    saadc_init(m_buffer_pool);
    saadc_sampling_event_enable();

    while (true)
    {
        __WFE(); 
    }
}

In the above code i can find out that the control is going to the saadc_sampling_event_enable() function and I can find the ADC data in the buffer but the GPIOTE pin is not getting monitored, means the control is not going to in_pin_handler function if there is any changes done in the input PIN.

I suppose both are using interrupt but why both are not executing can't be understood.

Please reply ASAP as the task is on priority and I am new to NRF52832 Soc.

Regards, Amit

[Stefan Birnir Sverrisson]

Hi Amit

Try the following example code where I have combined SAADC example and pin_change_int example from SDK 11.0.0. I have just included the gpio_init function into the standard saadc code and included nrf_drv_gpiote.h into the project and enabled GPIOTE in the nrf_drv_config.h file. Now I see LED1 blink when I press button 1 on the nRF52-DK v1.1.0, and SAADC is sampling and outputting the samples on the UART at the same time.

saadc_with_pin_change_int.zip

[Amit]

Hi Stefan, Thanks a lot for the reply. :-) I am unable to compile the project and getting the linking error for the undefined symbol 'nrf_drv_saadc_sample_task_get' I could not find the library where it is being defined. I am using Keil uVision5 and all the packs in the pack installer are up to date. Kindly can you let me know where can I find the definition of the same.

Regards, Amit