STM32H743IIT6学习笔记02——USART

STM32H743IIT6学习笔记——USART

1. 配置LED为推挽输出
2. 配置USART
3. 修改USART引脚，在PA9和PA10引脚选择USART1即可自动替换USART引脚
4. 配置时钟树后生成代码
5. 编译代码
6. usart.c中加入重定义printf的函数，并加入头文件#include <stdio.h>

int fputc(int ch,FILE *f)
{
    
	while((USART1->ISR&0x40)==0);
	USART1->TDR = (int8_t)ch;
	return ch;
}

7. 在主函数中加入代码

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();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
		HAL_GPIO_TogglePin(GPIOB,LED0_Pin);
		HAL_GPIO_TogglePin(GPIOB,LED1_Pin);
		HAL_Delay(100);
		
		printf("Hello world!\r\n");
  }
  /* USER CODE END 3 */
}

8. 工程配置中使能MicroLib
   
9. 编译、烧录、验证，串口默认波特率115200