Configuration of Digital Input/Output pins on nRF52

[anfedres]

Hello everybody, I'm new to the Nordic system and the nRF52. I'm trying to become familiar with the board and I want to be able to read different 4 input pins, each one attached to the LEDs. In few words, I'm looking to do something like this.

if(button_1 pressed)
{
 led_1=on;
}


if(button_2 pressed)
{
 led_2=on;
}


if(button_3 pressed)
{
 led_3=on;
}


if(button_4 pressed)
{
 led_4=on;
}

I have tried the example that comes with the SKD pin_change_int_pca10040. I have tried to modify the code with no luck. Any advice will be appreciate it.

Would I be able to use the following function to change the state of the pin from 0 to 1?

nrf_drv_gpiote_out_set

Also, will this one will change the state of the pin from 1 to 0

nrf_drv_gpiote_out_clear

How could I read the state change on the pin?

Thank you for your help

[anfedres]

I was looking something like this.

I have done my own code. Sorry if the question was too simple, sometimes libraries fail starting from the most basic example.

#include <stdbool.h>
#include "nrf.h"
#include "nrf_drv_gpiote.h"
#include "app_error.h"
#include "boards.h"


#define GPIO_PIN_17     17
#define GPIO_PIN_18     18
#define GPIO_PIN_19     19
#define GPIO_PIN_20     20

#define GPIO_PIN_27     27
#define GPIO_PIN_28     28
#define GPIO_PIN_29     29
#define GPIO_PIN_30     30

#define S_ON     1
#define S_OFF    0



void gpio_init(void)
{

			// Pins as outputs
	    nrf_gpio_range_cfg_input(27,30,NRF_GPIO_PIN_PULLUP);
	
			// Pins as inputs
			nrf_gpio_range_cfg_output(17, 20);
			
}

/**
 * @brief Function for application main entry.
 */
int main(void)
{
    gpio_init();

    while (true)
    {
			
			if(nrf_gpio_pin_read(GPIO_PIN_27))
			{
				nrf_gpio_pin_write(GPIO_PIN_17, S_OFF);
			}
			else
			{
				nrf_gpio_pin_write(GPIO_PIN_17, S_ON);
			}
			
			if(nrf_gpio_pin_read(GPIO_PIN_28))
			{
				nrf_gpio_pin_write(GPIO_PIN_18, S_OFF);
			}
			else
			{
				nrf_gpio_pin_write(GPIO_PIN_18, S_ON);
			}
			
			if(nrf_gpio_pin_read(GPIO_PIN_29))
			{
				nrf_gpio_pin_write(GPIO_PIN_19, S_OFF);
			}
			else
			{
				nrf_gpio_pin_write(GPIO_PIN_19, S_ON);
			}
			
			if(nrf_gpio_pin_read(GPIO_PIN_30))
			{
				nrf_gpio_pin_write(GPIO_PIN_20, S_OFF);
			}
			else
			{
				nrf_gpio_pin_write(GPIO_PIN_20, S_ON);
			}
	
 
    }
}