Sleep Modes and Wakeup Through GPIO IRQ

[BHAGYESH]

I have attached all sleep modes of our controller that i found through forums and from your suggestions.

But my problem is No one of these sleep modes, wake-up through GPIO IRQ.

Please provide me accurate details along with accurate settings of SLEEP MODES and WAKE-UP using GPIO IRQ.

I want to sleep my system(OFF), and it's wake-up on GPIO IRQ as RESET.

(I want full system go into OFF mode BLE, timers, and all other thing will off, BUT GPIO IRQ WORKING and my system wake-up through GPIO IRQ)

But in every sleep mode our GPIO has been disable or not working properly.

Please go through my attachment and suggest me what i have do for this sleep and wake-up mode using GPIO IRQ.New Microsoft Office Word Document (3).docx

[Einar Thorsrud]

This example (tested with SDK 10) demonstrates how you can use a GPIO to wake up a chip from system OFF mode. The key is to use pin sensing. This can be configured with nrf_gpio_cfg_sense_input().

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

static void gpio_init(void)
{
    ret_code_t err_code;

    // Configure output pin for LED
    err_code = nrf_drv_gpiote_init();
    APP_ERROR_CHECK(err_code);
    nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(false);
    err_code = nrf_drv_gpiote_out_init(BSP_LED_0, &out_config);
    APP_ERROR_CHECK(err_code);

    // Wake up button
    nrf_gpio_cfg_sense_input(BSP_BUTTON_2, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);
}


int main(void)
{
    gpio_init();

    while (true)
    {
        // Toggle LED (will continuously toggle while button is pressed, so it will appear dimmed)
        nrf_drv_gpiote_out_toggle(BSP_LED_0);
        
        // Go to system off
        NRF_POWER->SYSTEMOFF = 1; 
    }
}

[BHAGYESH]

I used your settings but it's not working with my program. My controller still in sleep mode.

[Einar Thorsrud]

How have you used it? You can verify that the above code works by running it on a nRF51 DK. You must of course adapt it to your application, but it shows the principle. Particularly you must substitute BSP_BUTTON_2 with whichever pin you want to use to wake up the chip.

If you cannot make it work and need more assistance you would be more likely to get good help if you describe in detail what you have done and how it fails.

[RixtronixLAB]

Hi Einar,

Does  nrf_gpio_cfg_sense_input work with softdevice ?

Regards,

Rixtronix LAB

[Einar Thorsrud]

Hi,

Yes, nrf_gpio_cfg_sense_input() can be used together with the SoftDevice.