nRF51422 cannot be waken after sleep/wake quite a few times.

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Wed, 20 Mar 2019 00:58:24 GMT

Hi Kenneth,

thanks for your suggestion, I did check with advertising on event and that I found out the event in the advertise.c file and I put some condition in the event (though it's not a good practice) and now it worked.

So the device is now just in a system on sleep in idle condition and I also put the watchdog just in case to prevent from the dead loop.

Thanks again for your great help.

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

Kenneth — Wed, 06 Mar 2019 14:29:25 GMT

1. If you are using the ble_advertising module, then you can find that in ble_advertising_on_ble_evt() on BLE_GAP_EVT_DISCONNECTED, that ble_advertising_start() is called automatically, you may consider comment out this.

2. That was a bit strange, when advertisement timeout I assume the code callback on_adv_evt() and BLE_ADV_EVT_IDLE event, maybe you are calling sleep_mode_enter() from a different place in your code in this case?

Best regards,
Kenneth

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Wed, 06 Mar 2019 02:37:57 GMT

Hi Kenneth, thanks and I did as what you mentioned but I still found some issues. I just put these code in the function "sleep_mode_enter()"

static void sleep_mode_enter (void)

{

/* Turn off other peripherals before go to system on sleep mode */

sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);

sd_ble_gap_adv_stop();

for(;;)

{

sd_app_evt_wait();

if(nrf_gpio_pin_read(SW_PWR_ON_PIN)==0)

{

NVIC_SystemReset();

}

I can see the device goes to system on sleep when sleep_mode_enter function is called and can wake up reset when I press the switch.

But the problems that I found out are

1. If the device is connected to the app and when I turn off the device (sleep_mode_enter called), the device disconnect the app and goes to sleep but it restarts advertising again so the app and the device got connected again.

2. if the device is not connected, I put sleep after advertisment timeout and when advertisement timeout occurs the device can go to sleep but when I check the current in power profiler kit, the current consumption is too high (about 3mA). But when the device is not connected and turn off the device before advertisement timeout, it goes to sleep and current consumption is acceptable (8uA only).

So what might be the possiblities?

(By the way, do I need to create a new topic for this question since this is not related with my previous issue)

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

Kenneth — Mon, 04 Mar 2019 12:50:35 GMT

To disconnect e.g.:

sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);

To stop advertising e.g.:

(void) sd_ble_gap_adv_stop(p_advertising->adv_handle);

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Fri, 01 Mar 2019 02:01:24 GMT

Hi Kenneth, thanks for the suggestion. I will try to do this but could you also help me how to disconnect BLE and stop advertising properly so that I can also try with system on sleep instead of system off sleep? Thanks.

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

Kenneth — Thu, 28 Feb 2019 12:10:43 GMT

Are you able to simplify and share your project to run on nrf51-dk so I can recreate the issue here?

Best regards,
Kenneth

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Thu, 28 Feb 2019 05:50:06 GMT

Hi Kenneth, sorry for my mistakes. Actually, the code is OK, I mean, the device blinking corretly but still the same issue that it cannot be wakeup after I press the button and put the device into deepsleep.

static void sleep_mode_enter(void)
{
//uint32_t err_code;
TurnOff_LEDs();
nrf_delay_ms(10);

__disable_irq();

//Disable Hi G, Low G and Emergency Interrupt pin to prevent System-off wakeup
nrf_drv_gpiote_in_uninit(SW_EMERGENGY_PIN);
nrf_drv_gpiote_in_event_disable(SW_EMERGENGY_PIN);
nrf_gpiote_int_disable(SW_EMERGENGY_PIN);

nrf_drv_gpiote_in_uninit(LOWG_INT_PIN);
nrf_drv_gpiote_in_event_disable(LOWG_INT_PIN);
nrf_gpiote_int_disable(LOWG_INT_PIN);

nrf_drv_gpiote_in_uninit(SW_PWR_ON_PIN);
nrf_drv_gpiote_in_event_disable(SW_PWR_ON_PIN);
nrf_gpiote_int_disable(SW_PWR_ON_PIN);

nrf_delay_ms(1);

nrf_gpio_cfg_input(SW_PWR_ON_PIN, NRF_GPIO_PIN_PULLUP);
nrf_gpio_cfg_sense_set(SW_PWR_ON_PIN, NRF_GPIO_PIN_SENSE_LOW);
//nrf_gpio_cfg_sense_input(SW_PWR_ON_PIN, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);

// Go to system-off mode (this function will not return; wakeup will cause a reset).
nrf_delay_ms(10);
NRF_POWER->SYSTEMOFF=1;
//sd_power_system_off();
NVIC_SystemReset();

//APP_ERROR_CHECK(err_code);
}

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Thu, 28 Feb 2019 02:30:58 GMT

Hi Kenneth, I don't know what's wrong with my code, I just tried what you suggested and it bacome even worse. When I tried the below code, my LED will blink twice and the device will go to deepsleep and couldn't be waken up as usual.

nrf_drv_gpiote_in_uninit(SW_PWR_ON_PIN);
nrf_drv_gpiote_in_event_disable(SW_PWR_ON_PIN);
nrf_gpiote_int_disable(SW_PWR_ON_PIN);

nrf_gpio_cfg_input(SW_PWR_ON_PIN,NRF_GPIO_PIN_PULLUP);
nrf_gpio_cfg_sense_set(SW_PWR_ON_PIN,NRF_GPIO_PIN_SENSE_LOW);

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

NRF_POWER->SYSTEMOFF=1;
NVIC_SystemReset();

//APP_ERROR_CHECK(err_code);
}

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Wed, 27 Feb 2019 15:18:04 GMT

OK Kenneth I will try and get back to you

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

Kenneth — Wed, 27 Feb 2019 13:42:00 GMT

Dont' enable irq again, instead follow my comment:

Enable wakeup on the pins you want to wakeup on by calling nrf_gpio_cfg_input() and nrf_gpio_cfg_sense_set().

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Wed, 27 Feb 2019 13:04:18 GMT

Hi Kenneth, when I tried this

static void sleep_mode_enter(void)
{
//uint32_t err_code;
TurnOff_LEDs();

__disable_irq()

nrf_delay_ms(10);

//Disable Hi G, Low G and Emergency Interrupt pin to prevent System-off wakeup
nrf_drv_gpiote_in_uninit(SW_EMERGENGY_PIN);
nrf_drv_gpiote_in_event_disable(SW_EMERGENGY_PIN);
nrf_gpiote_int_disable(SW_EMERGENGY_PIN);

nrf_drv_gpiote_in_uninit(LOWG_INT_PIN);
nrf_drv_gpiote_in_event_disable(LOWG_INT_PIN);
nrf_gpiote_int_disable(LOWG_INT_PIN);

nrf_gpio_cfg_sense_input(SW_PWR_ON_PIN,NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);

NRF_POWER->SYSTEMOFF = 1;
NVIC_SystemReset(); // I just added this code

//APP_ERROR_CHECK(err_code);
}

the device cannot wake up anymore.

so I added, __enable_irq() before NRF_POWER->SYSTEMOFF=1 and

it still cannot wake up after deepsleep (the symptom is the same as in my issue)

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Wed, 27 Feb 2019 12:48:02 GMT

Thanks Kenneth for your prompt reply. I will try this and let you know about the outcome.

Thanks again for your great help and hope this will solve my issue.

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

Kenneth — Wed, 27 Feb 2019 12:39:42 GMT

See my suggestion inline (look for //KME 3 places):

static void sleep_mode_enter(void)
{
    //uint32_t err_code;
        TurnOff_LEDs();
        
        // KME: Disable all interrupts here, e.g. __disable_irq() 
        
        nrf_delay_ms(10);
    
        //Disable Hi G, Low G and Emergency Interrupt pin to prevent System-off wakeup
        nrf_drv_gpiote_in_uninit(SW_EMERGENGY_PIN);
        nrf_drv_gpiote_in_event_disable(SW_EMERGENGY_PIN);
        nrf_gpiote_int_disable(SW_EMERGENGY_PIN);
        
        nrf_drv_gpiote_in_uninit(LOWG_INT_PIN);
        nrf_drv_gpiote_in_event_disable(LOWG_INT_PIN);
        nrf_gpiote_int_disable(LOWG_INT_PIN);

        //KME: Enable wakeup on the pins you want to wakeup on by calling nrf_gpio_cfg_input() and nrf_gpio_cfg_sense_set().
        
        // Go to system-off mode (this function will not return; wakeup will cause a reset).
        sd_power_system_off(); // KME: You can use NRF_POWER->SYSTEMOFF = 1; directly here.
        NVIC_SystemReset();  // I just added this code 

    //APP_ERROR_CHECK(err_code);
}

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Wed, 27 Feb 2019 10:24:34 GMT

And I want to test like this. In stead of going to system-off deep sleep mode, I want to try to go to system on sleep mode (power_manage) command but I want to turn off BLE and when the user press and hold the button again, I will just turn on the BLE and continue. Although it's not good for power saving, I want to eliminate this issue first.

So how can I do to turn off BLE and put the MCU in system on sleep mode and and turn on BLE again?

Thanks.

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Wed, 27 Feb 2019 10:17:16 GMT

Hi Kenneth,

Can you provide detailed chip markings on the nRF51422 ic?

the chip marking => N51422 QFACA1 170BAE

Can you try adding a 1Mohm between SWDIO and GND and check if you experience the same?

no I havent tried before and I will do it and may I know what's the purpose for this?

Can you send me your updated if(Flag.PowerOnOff==1){}?

I just added a single NVIC Reset command after system off sleep mode as I state in the comment.

if(Flag.PowerOnOff==1)
{

if( nrf_drv_gpiote_in_is_set(SW_PWR_ON_PIN) == false) // if the power on button is pressed
{
   for(uint8_t i=0;i<=6;i++)
    {
      nrf_delay_ms(500);
      if( nrf_drv_gpiote_in_is_set(SW_PWR_ON_PIN) == true)
      break;
      if( i==6)
      {
        sleep_mode_enter();
      }
    }
}

}

static void sleep_mode_enter(void)
{
   //uint32_t err_code;
       TurnOff_LEDs();
       nrf_delay_ms(10);

       //Disable Hi G, Low G and Emergency Interrupt pin to prevent System-off wakeup
       nrf_drv_gpiote_in_uninit(SW_EMERGENGY_PIN);
       nrf_drv_gpiote_in_event_disable(SW_EMERGENGY_PIN);
       nrf_gpiote_int_disable(SW_EMERGENGY_PIN);

       nrf_drv_gpiote_in_uninit(LOWG_INT_PIN);
       nrf_drv_gpiote_in_event_disable(LOWG_INT_PIN);
       nrf_gpiote_int_disable(LOWG_INT_PIN);

       // Go to system-off mode (this function will not return; wakeup will cause a reset).
    sd_power_system_off();
       NVIC_SystemReset(); // I just added this code

    //APP_ERROR_CHECK(err_code);
}

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

Kenneth — Wed, 27 Feb 2019 10:03:53 GMT

Can you provide detailed chip markings on the nRF51422 ic?

Can you try adding a 1Mohm between SWDIO and GND and check if you experience the same?

Can you send me your updated if(Flag.PowerOnOff==1){}?

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Wed, 27 Feb 2019 08:42:37 GMT

Hi Kenneth, I already put in the code snippet that you suggested and tested but the issue is still there. When I checked the supply voltage of the MCU when this issue happen, I found the supply voltage is there (which means it's not the hardware).Can I get any more suggestions? Thanks and waiting for your reply.

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

AnthonyThet — Thu, 17 Jan 2019 01:33:24 GMT

Thanks so much for your suggestion Kenneth, I will do like this and see the outcome and sorry for my late reply.

RE: nRF51422 cannot be waken after sleep/wake quite a few times.

Kenneth — Thu, 10 Jan 2019 14:06:13 GMT

Have you measured the current consumption, just to check if the chip is really in sleep?

I was thinking you can add a nvic_systemreset() after the system OFF command(s), just to catch any potential failure here (can't think of any, but might be worth a test to see if it impact the issue).

I recommend that you disable global interrupts if if(Flag.PowerOnOff==1) is true, just to make sure you don't have any interrupts when you start configuring the gpio's as wakeup sources.