GPIO pin mapping issue in nRF52840 PDK

[Labuka]

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]

What is the issue? Is the code not compiling, are you reading wrong value, etc.? It is hard to help you with a solution to a problem you have not described properly.

[Labuka]

The code is compiling and I have burnt the code. I'm reading only zero wherein the output should be one. I rechecked the sensor in Arduino, the sensor works fine. By default, the sensor outputs one and so the LED should light up and when there is a magnet nearby it outputs zero and LED should be off. I'm just wondering whether my pin mapping is wrong in the code. 

[Jørgen Holmefjord]

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]

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