STM32F4-UartPrint

串口的Printf打印

1.STM32CubeMx配置：

2.生成代码后，usart.c里增加代码

/* USER CODE BEGIN 1 */
int fputc(int ch, FILE *f)
{
	while (__HAL_UART_GET_FLAG(&huart1, UART_FLAG_TC) == RESET)
	{}
	HAL_UART_Transmit(&huart1, (uint8_t*) &ch,1,0xFF);

	return ch;
}
/* USER CODE END 1 */

3.主函数main.c里可以测试打印

  /* USER CODE BEGIN 2 */

	__HAL_UART_CLEAR_FLAG(&huart1,UART_FLAG_TC);

	printf("start\r\n");
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
	ChipID[0] = *(__IO uint32_t *)(0X1FFF7A10); // 高字节
	ChipID[1] = *(__IO uint32_t *)(0X1FFF7A14); // 
	ChipID[2] = *(__IO uint32_t *)(0X1FFF7A18); // 低字节
	
	printf("\r\n chip ID:%x-%x-%x\r\n",ChipID[0],ChipID[1],ChipID[2]);
	printf("\r\n flash capacity is:%dk\r\n",*(__IO uint16_t *)(0x1FFF7A22));

备注：这里打印了芯片ID和存储容量。地址参见

该图片摘抄于：https://blog.csdn.net/foxclever/article/details/80294516