GPIO pin configuration

RE: GPIO pin configuration

Amanda Hsieh — Mon, 25 Jan 2021 07:28:08 GMT

Glad to help.

-Amanda H.

RE: GPIO pin configuration

samuel kapa — Mon, 25 Jan 2021 07:19:28 GMT

hi Amanda H,

thanks for u r help.

RE: GPIO pin configuration

Amanda Hsieh — Thu, 21 Jan 2021 11:29:35 GMT

Hi Samuel,

Please see the Connector interface of nRF52840DK. I don't think there is P0.02.

P0.00 and P0.01 are used for the 32.768 kHz crystal and are not available on the connectors. For more information, see 32.768 kHz crystal.

-Amanda H.

RE: GPIO pin configuration

samuel kapa — Thu, 21 Jan 2021 10:49:27 GMT

hi Amanda H,

here is the sample code i am writing for gpio.

#include <zephyr.h>
#include <device.h>
#include <sys/util.h>
#include <inttypes.h>
#include <devicetree.h>
#include <sys/printk.h>
#include <drivers/pwm.h>
#include <drivers/gpio.h>
#include <nrfx/hal/nrf_gpio.h>

//#define SLEEP_TIME_MS 3000

#define OUTPUT_PIN 15

void main(void)
{
nrf_gpio_cfg_output(OUTPUT_PIN);

while (1) {
nrf_gpio_pin_set(OUTPUT_PIN);
k_sleep(K_SECONDS(3U));
nrf_gpio_pin_clear(OUTPUT_PIN);
k_sleep(K_SECONDS(3U));
}
}

with is pin number 15 or 16, 13, 14. i am getting output.

but if i change the pin number to like 1 or 2. i am not getting any out put but it's uploading to board.

thanks,

samuel kapa.

RE: GPIO pin configuration

Amanda Hsieh — Thu, 21 Jan 2021 10:04:56 GMT

Hi Samuel,

It is P0.16. You can also use NRF_GPIO_PIN_MAP(port, pin) with the definition if you want to use a pin on port 1.

-Amanda H.

RE: GPIO pin configuration

samuel kapa — Thu, 21 Jan 2021 09:43:42 GMT

hi Amanda H,

thanks for reply.

in #define OUTPUT_PIN 16.

what is mean by 16.

if its pin then what is port.

thanks,

samuel kapa

RE: GPIO pin configuration

samuel kapa — Thu, 21 Jan 2021 09:42:12 GMT

in #define OUTPUT_PIN 16.

what's 16 means

RE: GPIO pin configuration

Amanda Hsieh — Thu, 21 Jan 2021 09:19:00 GMT

Hi Samuel,

Not sure what exactly you want to use the GPIO configuration for.

This tutorial https://devzone.nordicsemi.com/nordic/nrf-connect-sdk-guides/b/getting-started/posts/nrf-connect-sdk-tutorial---part-2-ncs-v1-4-0 shows how to config GPIO for PWM on nRF9160DK and nRF5340 PDK, but the same concept can apply to nRF52840DK. You also could search for similar use cases on Devzone.

If you want to use GPIOs independently from any peripheral, you can also use the nrfx GPIO HAL functions directly in the code without setting .overlay or .config as

#include <nrfx/hal/nrf_gpio.h> 

#define OUTPUT_PIN 16

 

void main(void)
{
    nrf_gpio_cfg_output(OUTPUT_PIN);
    nrf_gpio_pin_clear(OUTPUT_PIN);
}

-Amanda H.