Disable bluetooth during GPIO interruption

[Enero]

Hi!

I'm working with a NRF51822 (not a dev card) and I want to disable and enable BLE by switching a switch. I've been looking at this thread and the functions bluetooth_sleep() and bluetooth_wake() work perfectly when used in the while(1) loop like this :

while(1)
  {
    while(!nrf_gpio_pin_read(GPIO_SWITCH));
    advertising_start();
    nrf_gpio_pin_clear(GPIO_LED);
    while(nrf_gpio_pin_read(GPIO_SWITCH));
    bluetooth_sleep();
    nrf_gpio_pin_set(GPIO_LED);

My interruption looks like this and is working well when I'm doing small stuff like toggling LEDs :

void GPIOTE_IRQHandler(){
      if(NRF_GPIOTE->EVENTS_PORT)
        NRF_GPIOTE->EVENTS_PORT = 0;
      if(nrf_gpio_pin_read(GPIO_SWITCH)){
        nrf_gpio_cfg_sense_input(GPIO_SWITCH, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_SENSE_LOW);
        nrf_gpio_pin_set(GPIO_LED);
      }
      else{
        nrf_gpio_cfg_sense_input(GPIO_SWITCH, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_SENSE_HIGH);
        nrf_gpio_pin_clear(GPIO_LED);
      }    
    }
}

But whenever I replace the nrf_gpio_pin_clear or set by bluetooth_sleep() and the start_advertising() functions in my GPIO interruption, it doesn't work. I've been turning on and off LEDs before using the functions and it seems the microcontroller gets always stuck when it has to turn the bluetooth on or off.

Here's my interruption activation, just in case:

  nrf_gpio_cfg_sense_input(GPIO_PUSH_BUTTON, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_SENSE_LOW);
  NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_PORT_Msk;
  NVIC_EnableIRQ(GPIOTE_IRQn);

If someone could give me a hint!

Thanks

Hugo B.

[Hung Bui]

Hi Hugo,

Please make sure you have set the GPIOTE_IRQ interrupt priority to APP_IRQ_PRIORITY_HIGH or APP_IRQ_PRIORITY_LOW (level 1 or 3) . The other 2 levels are reserved for the softdevice.

If the issue remains, please add a debug and find which error code returned after you call the function. (add the breakpoint after you call sd_ble_gap_adv_stop()

[Enero]

I've been rewriting my code, by configuring my different GPIOTE channels (instead of the PORT and by looking at the values of the different inputs and outputs) and using the Low IRQ priority it worked ! Even though BLE seems to crash from time to time, but I think it's due to another part of my code.

Thanks Hung !