STM32 multi serial port implementation of printf -- Based on cubemx

STM32 Multi serial port implementation printf—— be based on cubemx

Preface

This article mainly explains how to realize multiple serial ports by single chip microcomputer printf Print data .

The tools needed ：

• Development board :STM32F103RCT6
• STM32CubeMX
• IDE: Keil-MDK

cubemx End initialization

Enable the serial port , There are no other precautions .

keil End programming

stay usart.c Write the following code at the bottom

#include <stdarg.h>
#include <stdio.h>

uint8_t UartTxBuf[200];
void Usart2Printf(const char *format,...)
{
    
	uint16_t len;
	va_list args;	
	va_start(args,format);
	len = vsnprintf((char*)UartTxBuf,sizeof(UartTxBuf)+1,(char*)format,args);
	va_end(args);
	HAL_UART_Transmit(&huart2, UartTxBuf, len,0xff);
}

stay usart.h Write his function declaration inside , Such other .c Source file call serial port 2 Of printf Just include usart.h that will do .

void Usart2Printf(const char *format,...);

The results verify that

stay main.c Inside printing

Usart2Printf("hello usart%d\n",2);

Physical connection

Serial assistant view

Postscript

This article is included in ：

Tang Chengqian's video game station

This article is the tip of the iceberg in the series , Welcome to the station to check .

Supporting procedures ：

STM32 Multi serial port implementation printf, be based on cubemx- Embedded document resources -CSDN library