toggle a pin of nrf52

[kirt]

hi,

I am using nrf 52 DK and  softdevice S132,PCA10040 board . I need to toggle a pin,set a pin,reset a pin .can anyone take this ticket  to a sample code/ code snippet and which packs do i need to install.basically i just want to write a simple code where i want to toggle a pin continously .

[rishi.sikka]

Hey Kirt, this shouldn't be a problem at all. I do believe this is also a common question on the forum.

Simply include nrf_gpio.h in your C/C++ source file. This is Nordic's API that will let you interface with board at a high level. You can read more about GPIO here.

I would define a pin at the top of your code like the following. 

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

#define YOUR_PIN 			NRF_GPIO_PIN_MAP(1,3)	// Example connection - P1.03
#define FREQUENcY_MS        500

// in your init function use this to configure the pin: 
nrf_gpio_cfg_output(YOUR_PIN);  /* Initialize with default config of pin */


// probably you will put this in main loop ...

nrf_gpio_pin_toggle(YOUR_PIN);
nrf_delay_ms(FREQUENCY_MS);

// other useful gpio functions 
// nrf_gpio_pin_set(YOUR_PIN);
// nrf_gpio_pin_clear(YOUR_PIN);

The NRF_GPIO_PIN_MAP is a simple macro that converts the Pin # printed on the DK to the appropriate map for the board. The cfg_output simply sets the pin as an output instead of an input (no need for internal pull resistors). 

Then use the nrf_delay_ms function to create your frequency to continuously toggle a pin.

Hopefully this helps,

Rishi