给我一段单片机接收串口数据的代码
时间: 2023-08-13 12:04:25 浏览: 56
以下是基于STM32单片机的接收串口数据的代码示例:
```c
#include "stm32f4xx.h"
#include <stdio.h>
#define USARTx USART1
#define USARTx_IRQn USART1_IRQn
#define USARTx_IRQHandler USART1_IRQHandler
void USART_Config(void);
void USART_NVIC_Config(void);
int main(void)
{
char received_char;
USART_Config();
USART_NVIC_Config();
while(1)
{
//等待接收中断
}
return 0;
}
//USART初始化
void USART_Config(void)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
//打开USART1和GPIOA的时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
//将PA9引脚复用为USART1_TX
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1);
//将PA10引脚复用为USART1_RX
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);
//USART1初始化
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
//启用USART1
USART_Cmd(USART1, ENABLE);
}
//USART中断配置
void USART_NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
//配置USART1中断
NVIC_InitStructure.NVIC_IRQChannel = USARTx_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//启用USART1接收中断
USART_ITConfig(USARTx, USART_IT_RXNE, ENABLE);
}
//USART中断服务函数
void USARTx_IRQHandler(void)
{
if(USART_GetITStatus(USARTx, USART_IT_RXNE) != RESET)
{
char received_char = USART_ReceiveData(USARTx);
//接收到数据,进行相应处理
//...
}
}
```
该代码首先进行了USART和GPIO的初始化配置,然后启用了接收中断,并在中断服务函数中读取接收到的数据并进行处理。需要注意的是,该代码仅为示例代码,实际应用中需要根据具体要求进行相应的修改和优化。