GPIO configuration code

[Sadasivam]

Sir,

We want to know about sample code of how to configure GPIO pins as output, and let we know how to include them for led toggling.

[Jørgen Holmefjord]

Hi,

You can configure and control GPIOs using the GPIO abstraction API.

Below is an example of how to toggle LED1 on the nRF52 DK every 1 second:

#include "nrf.h"
#include "nrf_gpio.h"
#include "nrf_delay.h"

#define LED1_PIN 17

int main (void)
{
   nrf_gpio_cfg_output(LED1_PIN);
   nrf_gpio_pin_clear(LED1_PIN);
   while(1)
   {
       nrf_gpio_pin_toggle(LED1_PIN);
       nrf_delay_ms(1000);
   }
}

You can also have a look at GPIOTE, for more advanced GPIO controlling.

Best regards,

Jørgen

[Roger Clark]

To configure a pin as output you just need to use (Assuming your LED is on pin 29)

#define LED_PIN 29

nrf_gpio_cfg_output(LED_PIN);// Set LED PIN pin as output

To set the pin to High , use

nrf_gpio_pin_set(LED_PIN);

to set the pin to low, use

nrf_gpio_pin_clear(LED_PIN);

to toggle the pin use

nrf_gpio_pin_toggle(LED_PIN);

Note. You need to include "nrf_gpio.h"

[Sadasivam]

Thank you sir for your valuable answer.

[Sadasivam]

Thank you sir. And thanks for your valuable answer

[Luke Galea]

How would you go about using the nrf_gpio_cfg_output to configure pin 1.01 for example on the nRF52840?