BLE stack re-initialize problem with FreeRTOS

[silivanov]

How to correctly reinitialize the BLE stack when using FreeRTOS?

I can not find in the libraries where the task for the work of the stack under FreeRTOS is created.

Stopping the stack is successful, but here's a new initialization leads to a hardfall,

since FreeRTOS is running and the stack task most likely is not deleted when the stack is stopped.

For deinitialization I use the function - nrf_sdh_disable_request();

Problems with reinitialization have already been discussed in this thread - https://devzone.nordicsemi.com/support/214553

[Susheel Nuguru]

try this.

remove heap_1.c and add heap_2.c file in your project. Since heap_1,c does not support deletion of heap memory needed to delete the task.

add the below function in nrf_sdh_freertos.c

void nrf_sdh_freertos_deinit()
{
     // Use the handle to delete the task.
     if( m_softdevice_task != NULL )
     {
         vTaskDelete( m_softdevice_task );
     }
}

when you disable the softdevice delete the task along with disable

nrf_sdh_disable_request();
nrf_sdh_freertos_deinit();

When you want to reenable the softdevice, then do the below

    err_code = nrf_sdh_enable_request();
    APP_ERROR_CHECK(err_code);
    
    nrf_sdh_freertos_init(advertising_start, &erase_bonds);

Should work fine .

[Susheel Nuguru]

It also depends on the context on when you are disabling the softdevice and when you want to enable it back.

Small test on my side shows that this works fine, but i have tested it crudely in the idle handler like this

void vApplicationIdleHook( void )
{
    ret_code_t err_code;
  static uint32_t count = 0;
#if NRF_LOG_ENABLED
     vTaskResume(m_logger_thread);
#endif
  
  if (count++ == 0)
  {
        application_timers_stop();
    nrf_sdh_disable_request();
    nrf_sdh_freertos_deinit();


    ble_stack_init();
    
    application_timers_start();
    nrf_sdh_freertos_init(advertising_start, &erase_bonds);
  }

}

[Chongchun Moon]

Hello Susheel,

  Could you provide all the project file?

  I also try to enable and disable softdevice with  freeRTOS running.

  But, It doesn't work. I want to see what you changed.

  Thanks,

    Chongchun Moon

[silivanov]

Thank. This solves the problem.

[Chongchun Moon]

Hello Susheel,

  It works for me also. But, If I tried enable and disable softdevice.

  It looks Task for softdevice is not created due to memory shortage.

  Is that Okay on your test?

Thanks,

  Chongchun Moon