[NUCLEO-L452RE Review] + FREERTOS (CMSIS-RTOS) Event

ddllxxrr

[NUCLEO-L452RE Review] + FREERTOS (CMSIS-RTOS) Event [Copy link]

As of today, I think FREERTOS is CMSIS-RTOS, but it depends on which operating system it encapsulates. In addition to FREERTOS, I have seen that it can also encapsulate Keil RTX that comes with MDK. But I only use CMSIS-RTOS.

After all, we have to stand on the shoulders of giants.

I looked at events today. I think MDK explains events very clearly. Each task has 16 event bits once it is created. There is no need to create any event identifiers.

But the event should be translated into EVENT in English, but CMSIS-RTOS defines it as the signal Semaphone of the signal flag, and STM32CUBE does not handle it well. It is just a framework.

There is no definition at all. I am a lazy person and I don't write anything if I can. But this event has no definition, so I wrote it myself:

Continue with the previous program:

1. Define a thread and send events to the default task in this thread.

2. After the default task is received, print out the quantity, that's all.

/* USER CODE END Header_StartTask02 */
void StartTask02(void const * argument)
{
  /* USER CODE BEGIN StartTask02 */
  /* Infinite loop */
  for(;;)
  {
    osDelay(1000);
		osSignalSet(defaultTaskHandle,0x01);
  }
  /* USER CODE END StartTask02 */
}

/* USER CODE END Header_StartDefaultTask */
void StartDefaultTask(void const * argument)
{
  /* USER CODE BEGIN 5 */
	uint32_t count;
  /* Infinite loop */
  for(;;)
  {
    osSignalWait(0x01,osWaitForever);
		{
		count++;
		osDelay(1);
		LCD_ShowNum(10,80,count,5);
		}	
  }
  /* USER CODE END 5 */
}

The result is that a value plus 1 is displayed every minute.

After writing so much, I think FREERTOS (CMSIS-RTOS) is enough. As for how to use it, it is a combination of experience and failure. Maybe next time I will have to work on a mutex.

I don't think that thing is very useful in work, mutex is just to solve the priority inversion. I don't need it anyway.

w494143467

Awesome bro!

soso

Come on, come on

freebsder

CMSIS-RTOS has v1 and v2, which seem to be somewhat different. It is recommended to use v2