GPIO pin mapping issue in nRF52840 PDK

Question

I'm fairly new to nRF ecosystem and embedded studio. I'm just trying to read GPIO read of my digital hall sensor. Can anyone find what am I doing wrong with my code? I just modified the example blinky code. I've connected the sensor in P0.10

#include <stdbool.h>
#include <stdint.h>
#include "nrf_delay.h"
#include "boards.h"
#include "nrf_gpio.h"

 
 uint32_t j;
 #define sensor           10   
// #define sensor NRF_GPIO_PIN_MAP(0,10)

int main(void)
{
    /* Configure board. */
    bsp_board_leds_init();
    
    nrf_gpio_cfg_input(sensor,NRF_GPIO_PIN_NOPULL);
     
     

    /* Toggle LEDs. */
    while (true)
        {
            
           j = nrf_gpio_pin_read(sensor);
    
            printf("The value is: %d", j);
            nrf_delay_ms(500);

        if (j > 0)
          {

          bsp_board_led_on(0);
          nrf_delay_ms(500);
            
          }

        }
}

Jørgen Holmefjord · Accepted Answer

GPIO P0.10 is by default used for the NFCT antenna interface . Have you configured the symbol CONFIG_NFCT_PINS_AS_GPIOS is your application? Note that the GPIO is not connected to pin header, you will have to desolder and resolder resistor R46 to R45 pad.

Labuka · Answer

Thanks for the reply. It's working now, I've changed it to read it from another pin

GPIO pin mapping issue in nRF52840 PDK

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