串口printf
1打开microlib
2配置串口通信和GPIO
在usart.c中的begin和end之间写入如下代码
#include "usart.h"
/* USER CODE BEGIN 0 */
#include <stdio.h> //包含头文件
#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int _io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__*/
/******************************************************************
*@brief Retargets the C library printf function to the USART.
*@param None
*@retval None
******************************************************************/
PUTCHAR_PROTOTYPE
{
HAL_UART_Transmit(&huart4, (uint8_t *)&ch,1,0xFFFF);
return ch;
}
3main.h中:
包含#include <stdio.h>