In the last one Sending data through USART in STM32F0 programming with STM32Cube+Keil5 Based on that, I want to use the operating system to complete the experiment of USART sending string in the task.
Setting change of STM32CubeMX
- Enable FreeRTOS in Pinout
- Configure FreeRTOS in Configuration
- Add tasks
- Generate code
Edit code in Keil5
- main function
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init(); /* Hardware abstraction layer */
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config(); /* Clock */
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init(); /* STM32CubeMX GPIO initialization function generated */
MX_USART1_UART_Init(); /* STM32CubeMX Generated USART1 initialization function */
MX_USART2_UART_Init(); /* STM32CubeMX Generated USART2 initialization function */
/* USER CODE BEGIN 2 */
printf("\n\r Creating Task1 \n\r"); /* The statement I added. The character output from the serial port after the initialization of the serial port.*/
/* USER CODE END 2 */
/* Call init function for freertos objects (in freertos.c) */
MX_FREERTOS_Init(); /* STM32CubeMX Generated operating system kernel initialization function */
/* Start scheduler */
osKernelStart(); /* Start the scheduler, which controls the task execution. The following while() statement is out of reach*/
/* We should never get here as control is now taken by the scheduler */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
- freertos.c
Add include header file
/* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include "stm32f0xx_hal.h" / * I added it, otherwise I don't know printf*/ /* USER CODE END Includes */
Task handle defined by STM32CubeMX
osThreadId defaultTaskHandle; /* Default idle task handle */ osThreadId myTask1Handle; /* myTask 1 task handle I need */
Task function prototype declared by STM32CubeMX
void StartDefaultTask(void const * argument); void StartTask1(void const * argument);
Tasks defined and created by STM32CubeMX
/* definition and creation of defaultTask */ osThreadDef(defaultTask, StartDefaultTask, osPriorityIdle, 0, 128); defaultTaskHandle = osThreadCreate(osThread(defaultTask), NULL); /* definition and creation of myTask1 */ osThreadDef(myTask1, StartTask1, osPriorityNormal, 0, 128); myTask1Handle = osThreadCreate(osThread(myTask1), NULL);
I didn't do anything in my spare time
void StartDefaultTask(void const * argument)
{
/* USER CODE BEGIN StartDefaultTask */
/* Infinite loop */
for(;;)
{
osDelay(1);
}
/* USER CODE END StartDefaultTask */
}
Task 1 output string
void StartTask1(void const * argument)
{
/* USER CODE BEGIN StartTask1 */
/* Infinite loop */
for(;;)
{
printf("Task 1 is runing \r\n"); /* The printf has been redirected to USART2. Please refer to "sending data through USART by programming STM32F0 with STM32Cube+Keil5" (https://blog.csdn.net/aleif2p6/article/details/82918298) */
osDelay(3000); /* Delay 3 s */
}
/* USER CODE END StartTask1 */
}
- Compile link Project/Build Target
- Burn program Flash/Download
- Operation effect
