STM32串口初始化代码，中断源码，串口发送数据源码 - STM32串口初始化代码

////本文件命名为 USART1.c
#include "USART1.h"

#define USART1_RX_BUFFER_LENTH 256
uint8_t USART1_Rx_Buffer[USART1_RX_BUFFER_LENTH];
uint16_t RxCount1;

#define USART1_TX_BUFFER_LENTH 256
uint8_t USART1_Tx_Buffer[USART1_TX_BUFFER_LENTH];

////串口初始化函数
void USART1_Init(u32 My_BaudRate)
{
		
    GPIO_InitTypeDef  GPIO_InitStructure;
    USART_InitTypeDef  USART_InitStructure ;
    NVIC_InitTypeDef  NVIC_InitStructure ;
    
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 , ENABLE);
	 
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); 
        
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitStructure);
 
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING ;
    GPIO_Init(GPIOA,&GPIO_InitStructure);
    
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn ;        
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; 
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;       
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE ;         
    NVIC_Init(&NVIC_InitStructure);
 
 
    USART_DeInit(USART1);
    USART_InitStructure.USART_BaudRate = My_BaudRate;
    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_Tx | USART_Mode_Rx ;
    USART_Init(USART1, &USART_InitStructure);
    
    USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);
	USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
    
    USART_Cmd(USART1 , ENABLE);
	USART_ClearFlag(USART1, USART_FLAG_TC);
    //while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
}

////串口中断函数
void USART1_IRQHandler(void)
{

if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
    {
		USART_ClearITPendingBit(USART1, USART_IT_RXNE);
		USART1_Rx_Buffer[RxCount1] = USART_ReceiveData(USART1);
		RxCount1++;
		//*********这里自己写收到一个字节的函数********
    }
		
		
	if(USART_GetITStatus(USART1, USART_IT_IDLE) != RESET){	//空闲中断
		USART_ClearITPendingBit(USART1, USART_IT_IDLE);
		USART_ReceiveData(USART1);	////
		//*********这里自己写收到一帧数据的函数*********
        ///USART1_SendString(USART1_Rx_Buffer,RxCount1);  ////原样发回去
		RxCount1 = 0;
		USART1->SR; // 读取状态寄存器，清除IDLE标志
		USART1->DR; // 读取数据寄存器，确保IDLE标志被清除
	}
	
}

////发送一帧数据
void USART1_SendString(uint8_t *str, uint16_t len)
{
    uint16_t count = 0;
    for(count = 0; count < len; count++)
    {
        USART1 -> SR;
        USART_SendData(USART1, *str++);                                    
        while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);        
    }
}

////发送一个字节
void USART1_SendData(u8 sdata){
    USART1 -> SR;
	USART_SendData(USART1,sdata);                                    
    while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);       
}

回顶部

希望本站能帮您提升效率