My Board keeps rebooting continuously without any tasks

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1

Hi,

I am using FreeRTOS on STM32F4 MCU. And I am new to FreeRTOS, I have generated the configurations from STM32Cube IDE. Without any tasks, My board keeps rebooting, I don’t know what I am missing. Please help me to overcome this issue or is it normal behavior? Please explain.

Thanks in advance.

2

Did you start the scheduler?

How did you verify that the board is rebooting?

Can you share your code?

3

Yes

/* configSUPPORT_STATIC_ALLOCATION and configUSE_TIMERS are both set to 1, so the
application must provide an implementation of vApplicationGetTimerTaskMemory()
to provide the memory that is used by the Timer service task. */
void vApplicationGetTimerTaskMemory( StaticTask_t **ppxTimerTaskTCBBuffer,
		StackType_t **ppxTimerTaskStackBuffer,
		uint32_t *pulTimerTaskStackSize )
{
	/* If the buffers to be provided to the Timer task are declared inside this
function then they must be declared static – otherwise they will be allocated on
the stack and so not exists after this function exits. */
	static StaticTask_t xTimerTaskTCB;
	static StackType_t uxTimerTaskStack[ configTIMER_TASK_STACK_DEPTH ];

	/* Pass out a pointer to the StaticTask_t structure in which the Timer
    task’s state will be stored. */
	*ppxTimerTaskTCBBuffer = &xTimerTaskTCB;

	/* Pass out the array that will be used as the Timer task’s stack. */
	*ppxTimerTaskStackBuffer = uxTimerTaskStack;

	/* Pass out the size of the array pointed to by *ppxTimerTaskStackBuffer.
    Note that, as the array is necessarily of type StackType_t,
    configTIMER_TASK_STACK_DEPTH is specified in words, not bytes. */
	*pulTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
}
int main(void)
{
  HAL_Init();
  SystemClock_Config();
  PheripheralsInitialization();
  printf("Board Initialized\r\n");
  
  osThreadDef(defaultTask, StartDefaultTask, osPriorityNormal, 0, 128);
  defaultTaskHandle = osThreadCreate(osThread(defaultTask), NULL);

  osKernelStart();

  while(1);
}

When running in debug mode, I am getting “Board Initialized” text continuously in serial monitor. I used a global variable and incremented it within main(), printed and checked, I am getting variable as 0 continuously.

4

Is this the default code generated by the IDE or did you make any change? Can you share the complete code - may be put it in GitHub and share link?
Are you using custom hardware or a dev board? Can you step through the code of osKernelStart and see where it fails?