ble_app_gzll example

[Chris]

Hello

I am trying to run the dual mode BLE/Gazell application example ble_app_gzll. I adapted it slightly such that the stacks are switched automatically in main() as follows:

// Enter main loop.
for (;;)
{
  power_manage();
  //if (running_mode != previous_mode)
  //{
  //    previous_mode = running_mode;
    if (running_mode == GAZELL)
    {
      nrf_gpio_pin_set(GZLL_DEBUG_PIN);
  
      // Stop all heart rate functionality before disabling the SoftDevice.
      ble_hrs_app_stop();
  		
      // Disable the S110 stack.
      ble_stack_stop();
      nrf_gpio_pin_clear(ADVERTISING_LED_PIN_NO);
      nrf_gpio_pin_clear(CONNECTED_LED_PIN_NO  );
  		
      // Enable Gazell.
      gzll_app_start();
      timers_init();
      gpiote_init();
      buttons_init();
  
      running_mode = BLE;
      nrf_gpio_pin_clear(GZLL_DEBUG_PIN);
    }
    else if (running_mode == BLE)
    {
      nrf_gpio_pin_set(BLE_DEBUG_PIN);
  
      // Disable Gazell.
      gzll_app_stop();
      nrf_gpio_pin_clear(GZLL_TX_SUCCESS_LED_PIN_NO);
      nrf_gpio_pin_clear(GZLL_TX_FAIL_LED_PIN_NO   );
  		
      // Re-enable the S110 stack.
      ble_stack_start();
      timers_init();
      gpiote_init();
      buttons_init();
      ble_hrs_app_start();
  
      running_mode = GAZELL;
      nrf_gpio_pin_clear(BLE_DEBUG_PIN);
    }
  //}
}

However, the program crashes every time it reaches advertising_start(); and ends in the app_error_handler with a NRF_ERROR_INVALID_STATE error.

Moreover, in the very first execution a NRF_ERROR_SOC_NVIC_INTERRUPT_PRIORITY_NOT_ALLOWED error occurs during initialization upon calling ble_stack_start(); and resets the device.

Any ideas what I am doing wrong here? The s110_nrf51822_5.2.1_softdevice.hex SoftDevice is flashed on my nRF51822. Does the Gazell protocoll need something like a pre-flashed "SoftDevice" too?

Thanks for your advice!

BR, christof

[Leszek]

Hi I started to use the ble_app_gzll example but I have one problem. As I see in the source code switching require to reinit the whole BLE/gzll stack. This means that every time I switch back to BLE mode I starts from advertising and the previous connection with device is lost. How can I hold the connection information between switching?

I know that it is possible to skip few messages/ack between central and peripherial and still maintain the connection over BLE, but how to achieve it with ble_app_gzll example? Is it possible? I hope so.

[Ole Morten]

This is really a completely separate question, and would have been better off on it's own.

Anyway, what you want is unfortunately not currently possible, and you will lose the BLE link for each time you switch.