STM32串口发送数据控制LED灯的亮灭

1、配置相应的 GPIO 时钟、串口时钟、复用时钟

2、配置GPIO结构体

3、配置串口

main.c

#include "stm32f10x.h"
#include "delay.h"
#include "led.h"
#include "usart.h"

int main(void)
{
		LED_Init();//初始化
		NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//中断等级
		My_usart1();//串口初始化
	
	
		
	while(1)
	{
		
	}
}

usart.c

#include "usart.h"
#include "led.h"
#include "beep.h"

void USART_SendByte(USART_TypeDef* USARTx, uint16_t Data)
{
		USART_SendData( USARTx, Data);
		while( USART_GetFlagStatus(USARTx, USART_FLAG_TXE) == RESET );
}

void USART_SendStr(USART_TypeDef* USARTx, char* str)
{
		uint16_t i=0;
		
		while( *(str+i) != '\0' )
		{

				
				USART_SendByte( USART1, *(str+i) );
				i++;
		}
		
		while( USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET );
}



void My_usart1(void)
{
	GPIO_InitTypeDef GPIO_InitStruct;
	USART_InitTypeDef USART_InitStruct;
	NVIC_InitTypeDef NVIC_InitStruct;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//时钟使能 配置GPIOA、串口时钟、复用时钟
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//时钟使能
	
	GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF_OD;     //GPIOA设置为复用推挽输出
	GPIO_InitStruct.GPIO_Pin=GPIO_Pin_9;
	GPIO_InitStruct.GPIO_Speed=GPIO_Speed_10MHz;
	GPIO_Init(GPIOA,&GPIO_InitStruct);
	
	GPIO_InitStruct.GPIO_Mode=GPIO_Mode_IN_FLOATING;//浮空输出
	GPIO_InitStruct.GPIO_Pin=GPIO_Pin_10;
	GPIO_InitStruct.GPIO_Speed=GPIO_Speed_10MHz;
	GPIO_Init(GPIOA,&GPIO_InitStruct);
	
	//串口初始化
	USART_InitStruct.USART_BaudRate=115200;
	USART_InitStruct.USART_HardwareFlowControl=USART_HardwareFlowControl_None;//
	USART_InitStruct.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
	USART_InitStruct.USART_Parity=USART_Parity_No;
	USART_InitStruct.USART_StopBits=USART_StopBits_1;
	USART_InitStruct.USART_WordLength=USART_WordLength_8b;
	
	USART_Init(USART1,&USART_InitStruct);   //初始化串口
	
	
	
	USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);//开启接收中断
		
	USART_Cmd(USART1,ENABLE);//串口使能

	//配置NVIC优先级结构体
	NVIC_InitStruct.NVIC_IRQChannel=USART1_IRQn;     
	NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
	NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=1;
	NVIC_InitStruct.NVIC_IRQChannelSubPriority=1;
	NVIC_Init(&NVIC_InitStruct);
	
}


//中断服务函数
void USART1_IRQHandler(void)
{
		u16 res;
		u16 ress;
		if(USART_GetITStatus(USART1,USART_IT_RXNE))
		{
			res=USART_ReceiveData(USART1);
			
			USART_SendData(USART1,res);	
               if(res=='O')
				{
					LED0=1;
					LED1=0;
					USART_SendStr(USART1, "GreenLED is open");

				}
				else if(res=='C')
				{
					LED0=0;
					LED1=1;
				USART_SendStr(USART1, "RedLED is open");
				}	
				else if(res=='B')
				{
					BEEP=1;
				USART_SendStr(USART1, "RedLED is open");
				}			
		}
}

usart.h

#include "stm32f10x.h"
#include <stdio.h>

void usart_init(void);
void My_usart1();
void USART_SendByte(USART_TypeDef* USARTx, uint16_t Data);
void USART_SendStr(USART_TypeDef* USARTx, char* str);

最后！！！