104-CH32V307(WCH单片机)学习开发-串口

2022-05-25 10:27:16 浏览数 (1)

串口1

代码语言：javascript复制
void uart_init(u32 bound1){
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_USART1|RCC_APB2Periph_AFIO , ENABLE);

    //USART1_TX   GPIOA.9
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    //USART1_RX   GPIOA.10初始化
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    //USART 初始化设置
    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_InitStructure.USART_BaudRate = bound1;//串口波特率
    USART_Init(USART1, &USART_InitStructure); //初始化串口1

    /*中断优先级配置*/
    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); //根据指定的参数初始化VIC寄存器

    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断

    USART_Cmd(USART1, ENABLE);                    //使能串口
}



//串口中断服务程序
__attribute__((interrupt("WCH-Interrupt-fast")))
void USART1_IRQHandler(void)
{
    u8 Res;
    if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
    {
        Res =USART_ReceiveData(USART1); //读取接收到的数据
    }
}

串口发送数据

代码语言：javascript复制
void usart_send_bytes(USART_TypeDef *USARTx, char *c,uint32_t cnt)
{
    while(cnt--)
    {
        USART_SendData(USARTx, *c  );
        while(USART_GetFlagStatus(USARTx, USART_FLAG_TXE) == RESET );
    }
}


usart_send_bytes(USART1, "11223344", 4);//发送数据

串口1,2,3

代码语言：javascript复制
void uart_init(u32 bound1,u32 bound2,u32 bound3){
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2|RCC_APB1Periph_USART3, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_USART1|RCC_APB2Periph_AFIO , ENABLE);

    //串口引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    //串口引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    //串口引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    //USART 初始化设置
    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_InitStructure.USART_BaudRate = bound1;//串口波特率
    USART_Init(USART1, &USART_InitStructure); //初始化串口1

    USART_InitStructure.USART_BaudRate = bound2;//串口波特率
    USART_Init(USART2, &USART_InitStructure); //初始化串口2

    USART_InitStructure.USART_BaudRate = bound3;//串口波特率
    USART_Init(USART3, &USART_InitStructure); //初始化串口3

    /*串口--1*/
    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); //根据指定的参数初始化VIC寄存器

    /*串口--2*/
    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器

    /*串口--3*/
    NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断
    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启串口接受中断
    USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//开启串口接受中断

    USART_Cmd(USART1, ENABLE);                    //使能串口
    USART_Cmd(USART2, ENABLE);                    //使能串口
    USART_Cmd(USART3, ENABLE);                    //使能串口
}


//串口中断服务程序
__attribute__((interrupt("WCH-Interrupt-fast")))
void USART1_IRQHandler(void)
{
    u8 Res;
    if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
    {
        Res =USART_ReceiveData(USART1); //读取接收到的数据
    }
}

//串口中断服务程序
__attribute__((interrupt("WCH-Interrupt-fast")))
void USART2_IRQHandler(void)
{
    u8 Res;
    if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
    {
        Res =USART_ReceiveData(USART2); //读取接收到的数据
    }
}

//串口中断服务程序
__attribute__((interrupt("WCH-Interrupt-fast")))
void USART3_IRQHandler(void)
{
    u8 Res;
    if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
    {
        Res =USART_ReceiveData(USART3); //读取接收到的数据
    }
}

串口4

代码语言：javascript复制
void uart_init(u32 bound4){
    //GPIO端口设置
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2|RCC_APB1Periph_USART3|RCC_APB1Periph_UART4, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_USART1|RCC_APB2Periph_AFIO , ENABLE);

    //串口引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOC, &GPIO_InitStructure);


    //USART 初始化设置
    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_InitStructure.USART_BaudRate = bound4;//串口波特率
    USART_Init(UART4, &USART_InitStructure); //初始化串口

    /*串口--4*/
    NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);//开启串口接受中断

    USART_Cmd(UART4, ENABLE);                    //使能串口
}



//串口中断服务程序
__attribute__((interrupt("WCH-Interrupt-fast")))
void UART4_IRQHandler(void)
{
    u8 Res;
    if(USART_GetITStatus(UART4, USART_IT_RXNE) != RESET)
    {
        Res =USART_ReceiveData(UART4); //读取接收到的数据
        USART_SendData(UART4, Res);//返回接收的数据
    }
}

串口5

代码语言：javascript复制
void uart_init(u32 bound5){
    //GPIO端口设置
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2|RCC_APB1Periph_USART3|RCC_APB1Periph_UART4|RCC_APB1Periph_UART5, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_USART1|RCC_APB2Periph_AFIO , ENABLE);

    //串口引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOD, &GPIO_InitStructure);


    //USART 初始化设置
    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_InitStructure.USART_BaudRate = bound5;//串口波特率
    USART_Init(UART5, &USART_InitStructure); //初始化串口

    /*串口--5*/
    NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);//开启串口接受中断

    USART_Cmd(UART5, ENABLE);                    //使能串口
}


//串口中断服务程序
__attribute__((interrupt("WCH-Interrupt-fast")))
void UART5_IRQHandler(void)
{
    u8 Res;
    if(USART_GetITStatus(UART5, USART_IT_RXNE) != RESET)
    {
        Res =USART_ReceiveData(UART5); //读取接收到的数据
        USART_SendData(UART5, Res);
    }
}

串口6,7,8根据串口4,5修改就可以

            TX , RX

串口6(PC0, PC1)

串口7(PC2, PC3)

串口8(PC4, PC5)

我提供了一套标准的数据处理方案

1,提供的例程是串口1和串口2接收到什么数据就返回什么数据

2,我这边自己实现了延时函数,所以把官方的屏蔽了

3,printf我这边也改了(中断发送,不会阻塞)

4,串口1和串口2接收数据都是使用环形队列接收

4,串口1判断接收完一条数据使用的是自带的空闲中断

5,串口2判断接收完一条数据是使用定时器自定义的空闲时间

6,串口1发送数据可以使用中断方式

数据处理 定时器 队列

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