wake up from sleep mode using NFC not working with softdevice

RE: wake up from sleep mode using NFC not working with softdevice

pd@learner — Sun, 16 Jun 2019 08:40:30 GMT

The problem is resolved. I have removed NRF_NFCT->TASKS_SENSE = 1; It works

RE: wake up from sleep mode using NFC not working with softdevice

Vidar Berg — Wed, 12 Jun 2019 14:31:30 GMT

I ran the function below to enter System OFF mode with the ble_app_hrs example but did not manage to reproduce the problem.

/**@brief Function for putting the chip into sleep mode.
 *
 * @note This function will not return.
 */
static void sleep_mode_enter(void)
{
    ret_code_t err_code;

    err_code = bsp_indication_set(BSP_INDICATE_IDLE);
    APP_ERROR_CHECK(err_code);

    err_code = bsp_nfc_sleep_mode_prepare();
    APP_ERROR_CHECK(err_code);
    
    err_code = bsp_buttons_disable();
    APP_ERROR_CHECK(err_code);

    // Go to system-off mode (this function will not return; wakeup will cause a reset).
    err_code = sd_power_system_off();
    APP_ERROR_CHECK(err_code);
}

Could you try to not initialize the NFC in your code, only start "sense", and see if you get the same result?

RE: wake up from sleep mode using NFC not working with softdevice

pd@learner — Thu, 06 Jun 2019 15:10:30 GMT

I have also tried by uninitialized twi driver and stop time before sd_power_system_off () but result is same.

RE: wake up from sleep mode using NFC not working with softdevice

pd@learner — Thu, 06 Jun 2019 13:36:53 GMT

Yes I have comment one by one line in following code and observe the advertising. So that i have said that it reaches to sd_power_system off. This is additional code if skip this my custom board advertising continuously.

	if (m_system_off_mode_on)
        {
		
		m_system_off_mode_on = false;
		// Set NFC as wake up Source
		NRF_NFCT->TASKS_SENSE = 1;
        nrf_delay_ms(100);
        // Enter System OFF mode.
        sd_power_system_off();
        }

RE: wake up from sleep mode using NFC not working with softdevice

Vidar Berg — Thu, 06 Jun 2019 13:15:34 GMT

Please place a breakpoint at this line to confirm. There can be several reasons why the board is not advertising.

RE: wake up from sleep mode using NFC not working with softdevice

pd@learner — Thu, 06 Jun 2019 13:11:13 GMT

Program reaches to sd_power_system off. I have verified through nrfConnect APP. Because Borad is not detected after I have set m_system_off_mode_on though nfc.

RE: wake up from sleep mode using NFC not working with softdevice

Vidar Berg — Thu, 06 Jun 2019 13:05:30 GMT

Hello,

I don't see anything obvious. Have you debugged the app and verified that the program reaches this line: sd_power_system_off();?

RE: wake up from sleep mode using NFC not working with softdevice

pd@learner — Thu, 06 Jun 2019 11:07:42 GMT

In above question I forgot to mention that I have set flag m_system_off_mode_on through nfc.