STM32串口配置_stm32 串口指定 gpio 口

串口一

void usart1_Init(u32 bound)
{
	//GPIO端口设置
	GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC, ENABLE);//使能USART1,GPIOA,C时钟
      
	//USART1_TX   GPIOA.9
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;    //复用推挽输出
	GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.9
 
	//USART1_RX      GPIOA.10初始化
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
	GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10  
 
	//Usart1 NVIC 配置
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);    //设置NVIC中断分组2:2位抢占优先级，2位响应优先级   0-3;
	NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;        //子优先级3
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;            //IRQ通道使能
	NVIC_Init(&NVIC_InitStructure);    //根据指定的参数初始化VIC寄存器
	
	//USART 初始化设置
	USART_InitStructure.USART_BaudRate = bound;//串口波特率
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
	USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
	USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;    //收发模式
	
	USART_Init(USART1, &USART_InitStructure); //初始化串口1
	USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断
	USART_Cmd(USART1, ENABLE);                    //使能串口1 
}
 
USART1_IRQHandler(void)                    //串口1中断服务程序
{
	if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) 
	{
		
	}
    USART_ClearFlag(UART1,USART_IT_RXNE); //一定要清除接收中断
}

串口二

void usart2_Init(u32 bound)
{  
	GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	//|RCC_APB2Periph_AFIO
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);//使能GPIOA时钟
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);//使能USART2时钟
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;    //PA2
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;    //复用推挽
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;//PA3
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入
	GPIO_Init(GPIOA, &GPIO_InitStructure);  
	
	RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2,ENABLE);//复位串口2
	RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2,DISABLE);//停止复位
	
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);    //设置NVIC中断分组2:2位抢占优先级，2位响应优先级   0-3;
	NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; //使能串口2中断
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; //先占优先级2级
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级2级
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
	NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
	
	USART_InitStructure.USART_BaudRate = bound;//波特率设置
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;//8位数据长度
	USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
	USART_InitStructure.USART_Parity = USART_Parity_No;///奇偶校验位
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//收发模式
	
	USART_Init(USART2, &USART_InitStructure); ; //初始化串口
	USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启中断
	USART_Cmd(USART2, ENABLE);                    //使能串口 
}
 
void USART2_IRQHandler(void)
{       
	if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //接收到数据
	{          
 
  }  
  USART_ClearFlag(UART2,USART_IT_RXNE); //一定要清除接收中断    
} 

串口3

//串口3初始化
void uart3_init(u32 bound)
{
  //GPIO端口设置
  GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	 
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);
 
	//USART3_TX   GPIOB.10
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PB.10
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//复用推挽输出
  GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOB.10
   
  //USART3_RX	  GPIOB.11初始化
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;//PB.11
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
  GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOB.11  
 
  //Usart1 NVIC 配置
  NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1 ;//抢占优先级1
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;		//子优先级3
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			//IRQ通道使能
	NVIC_Init(&NVIC_InitStructure);	//根据指定的参数初始化VIC寄存器
  
   //USART 初始化设置
 
	USART_InitStructure.USART_BaudRate = bound;//串口波特率
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
	USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
	USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;	//收发模式
 
  USART_Init(USART3, &USART_InitStructure); 			//初始化串口3
  USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);	//开启串口接收中断
  USART_Cmd(USART3, ENABLE);                    	//使能串口3
}
 
//串口3中断服务程序
void USART3_IRQHandler(void)
{
	if(USART_GetITStatus(USART3, USART_IT_RXNE))//接收中断
	{				
 
	}
	USART_ClearITPendingBit(USART3, USART_IT_RXNE);
}

串口4

//串口4初始化
void uart4_init(u32 bound)
{
  //GPIO端口设置
  GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	 
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4,ENABLE);
 
	//USART4_TX   GPIOC.10
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PC.10
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//复用推挽输出
  GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化GPIOC.10
   
  //USART3_RX	  GPIOC.11初始化
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;//PC.11
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
  GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化GPIOC.11  
 
  //Usart1 NVIC 配置
  NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2 ;//抢占优先级2
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;		//子优先级3
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			//IRQ通道使能
	NVIC_Init(&NVIC_InitStructure);	//根据指定的参数初始化VIC寄存器
  
   //UART 初始化设置
	USART_InitStructure.USART_BaudRate = bound;//串口波特率
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
	USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
	USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;	//收发模式
 
  USART_Init(UART4, &USART_InitStructure); 			//初始化串口4
  USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);	//开启串口接收中断
  USART_Cmd(UART4, ENABLE);                    	//使能串口4
}
 
//串口4中断服务程序
void UART4_IRQHandler(void)
{
 
	if(USART_GetITStatus(UART4, USART_IT_RXNE))//接收中断
	{				
		
		
	}
    USART_ClearITPendingBit(UART4, USART_IT_RXNE);
}

串口5

暂时还没用到
那就先不写