STM32的uart1、uart2、uart3重定向函数

标准库

//uart1 int fputc(int ch,FILE *f) { while(USART_GetFlagStatus(USART1,USART_FLAG_TC) != SET); USART_SendData(USART1,(unsigned char)ch); while(USART_GetFlagStatus(USART1,USART_FLAG_TC) != SET); return (ch); } //uart2 int fputc(int ch,FILE *f) { while(USART_GetFlagStatus(USART2,USART_FLAG_TC) != SET); USART_SendData(USART2,(unsigned char)ch); while(USART_GetFlagStatus(USART2,USART_FLAG_TC) != SET); return (ch); } //uart3 int fputc(int ch,FILE *f) { while(USART_GetFlagStatus(USART3,USART_FLAG_TC) != SET); USART_SendData(USART3,(unsigned char)ch); while(USART_GetFlagStatus(USART3,USART_FLAG_TC) != SET); return (ch); }