Can we configure multiple GPIO pins for wake up NRF52832

[NileshK]

HI All,

We are using NRF52832 for our project.

We use System OFF mode for putting NRF52832 into sleep and using multiple GPIO inputs pins (pin1, Pin2 and Pin3) for wake up purpose.

When we use multiple pins (pin1, Pin2 and Pin3), NRF52832 does not go to sleep mode itself.

If we try individual pins Pin1 OR Pin2 OR Pin3 for wake up , NRF52832 does go to sleep mode and wakes up based on  Pin1 OR Pin2 OR Pin3.

Can we configure multiple pins for waking up?

Please send some example/sample code if anyone is having it.

Code:

void BOARD_InitWakeupPin(void)
{
ret_code_t err_code;

//Configure wake-up
//Input Signal 1 :Wake Up
nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_HITOLO(false);
in_config.pull = NRF_GPIO_PIN_PULLUP;
err_code = nrf_drv_gpiote_in_init(INPUT_1, &in_config, NULL);
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_in_event_enable(INPUT_1, true);


//Input Signal 2 :Wake Up
nrf_drv_gpiote_in_config_t r_in_config = GPIOTE_CONFIG_IN_SENSE_HITOLO(false);
r_in_config.pull = NRF_GPIO_PIN_PULLUP;
err_code = nrf_drv_gpiote_in_init(INPUT_2, &r_in_config, NULL);
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_in_event_enable(INPUT_2, true);

//Input Signal 3 :Wake Up
nrf_drv_gpiote_in_config_t t_in_config = GPIOTE_CONFIG_IN_SENSE_HITOLO(false);
t_in_config.pull = NRF_GPIO_PIN_PULLUP;
err_code = nrf_drv_gpiote_in_init(INPUT_3, &t_in_config, NULL);
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_in_event_enable(INPUT_3, true);

}
void ChipEnterSystemOffMode(void)
{
/*Enter System-off*/
NRF_POWER->SYSTEMOFF = 1;
}

void Enter_Sleep_Mode(void)
{
nrf_drv_gpiote_in_uninit(INPUT_1);
nrf_drv_gpiote_in_event_disable(INPUT_1);

nrf_drv_gpiote_in_uninit(INPUT_2);
nrf_drv_gpiote_in_event_disable(INPUT_2);

nrf_drv_gpiote_in_uninit(INPUT_3);
nrf_drv_gpiote_in_event_disable(INPUT_3);

/*Prepare for wakeup using GPIO */
BOARD_InitWakeupPin();

/* Enter MCU Deep Sleep mode */
ChipEnterSystemOffMode();
}

void gpiote_init (void) {

nrf_drv_gpiote_in_config_t config;

config.hi_accuracy = true;
config.is_watcher = false;
config.pull = NRF_GPIO_PIN_PULLUP;
config.sense = NRF_GPIOTE_POLARITY_TOGGLE;

nrf_drv_gpiote_init();
nrf_drv_gpiote_in_init(INPUT_1, &config, gpiote_callback);
nrf_drv_gpiote_in_init(INPUT_2, &config, gpiote_callback);
nrf_drv_gpiote_in_init(INPUT_3, &config, gpiote_callback);
nrf_drv_gpiote_in_event_enable(INPUT_1, true);
nrf_drv_gpiote_in_event_enable(INPUT_2, true);
nrf_drv_gpiote_in_event_enable(INPUT_3, true);
}

main()
{
    gpiote_init();

    Enter_Sleep_Mode();
}

[Susheel Nuguru]

GPIOTE wont work in systemoff. All of those peripherals are completely shutdown in systemoff mode. In your case just configure a GPIO without using the GPIOTE and this should work. Simple test code below

Fullscreen 00457.main.c Download

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/** @file
 *
 * @defgroup blinky_example_main main.c
 * @{
 * @ingroup blinky_example
 * @brief Blinky Example Application main file.
 *
 * This file contains the source code for a sample application to blink LEDs.
 *
 */

#include <stdbool.h>
#include <stdint.h>
#include "nrf_delay.h"
#include "boards.h"
#include "nrf_drv_gpiote.h"

#define INPUT_1 13
#define INPUT_2 14
#define INPUT_3 15

void BOARD_InitWakeupPin(void)
{
    ret_code_t err_code;

    //Configure wake-up
    //Input Signal 1 :Wake Up
 
    //// This pin is used for waking up from System OFF and is active low, enabling sense capabilities.
    nrf_gpio_cfg_sense_input(INPUT_1, BUTTON_PULL, NRF_GPIO_PIN_SENSE_LOW);
    nrf_gpio_cfg_sense_input(INPUT_2, BUTTON_PULL, NRF_GPIO_PIN_SENSE_LOW);
    nrf_gpio_cfg_sense_input(INPUT_3, BUTTON_PULL, NRF_GPIO_PIN_SENSE_LOW);
}

void ChipEnterSystemOffMode(void)
{
    /*Enter System-off*/
    NRF_POWER->SYSTEMOFF = 1;
}

void Enter_Sleep_Mode(void)
{

    /*Prepare for wakeup using GPIO */
    BOARD_InitWakeupPin();

    /* Enter MCU Deep Sleep mode */
    ChipEnterSystemOffMode();
}

void gpiote_init (void) {

    nrf_drv_gpiote_init();
    BOARD_InitWakeupPin();
}

/**
 * @brief Function for application main entry.
 */
int main(void)
{
    /* Configure board. */
    bsp_board_init(BSP_INIT_LEDS);
    gpiote_init();

    /* Toggle LEDs. */
    while (true)
    {
        for (int i = 0; i < LEDS_NUMBER; i++)
        {
            bsp_board_led_invert(i);
            nrf_delay_ms(500);
        }
           Enter_Sleep_Mode();

    }
}





/**
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