STM32F103 5个串口同时使用

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硬件平台：STM32F103(自带5串口)

5个串口同时工作不丢包-_-

相关宏定义

typedef enum{    UartPort1,    UartPort2,    UartPort3,    UartPort4,    UartPort5,    UartPort_USB,}UARTPORT;#define   RXTIMEOUT    10         // 接收超时时间,如10mSec内未接收任何数据,当作一个接收包#define   UART_TXBUFFERLEN  0x100         //发送缓冲区大小#define   UART_RXBUFFERLEN  0x400          //接接缓冲区大小typedef struct{    //接收    volatile Uint       rxHead;    volatile Uint       rxTail;    volatile Uchar      rxBuf[UART_RXBUFFERLEN];    volatile Uchar      rxTimeOut_Base;    volatile Uchar      rxTimeOut;    //发送    volatile Uint       txHead;    volatile Uint       txTail;    volatile BOOLEAN    txEmpty;    volatile Uchar      baudrate;    volatile Uchar      txIdleTimeOut;    volatile Uchar      txIdleTimeOut_Base;    volatile Uchar      txBuf[UART_TXBUFFERLEN];}UART_STRUCT;static UART_STRUCT uart1;static UART_STRUCT uart2;static UART_STRUCT uart3;static UART_STRUCT uart4;static UART_STRUCT uart5;

串口1初始化

    USART_InitTypeDef USART_InitStruct;    GPIO_InitTypeDef GPIO_InitStruct;    NVIC_InitTypeDef NVIC_InitStruct;    RCC_APB2PeriphClockCmd( RCC_APB2Periph_USART1, ENABLE );    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;    /* Configure USART1 Tx (PA9) as alternate function push-pull */    GPIO_InitStruct.GPIO_Pin = PIN_USART1_TXD;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;    GPIO_Init( PORT_USART1_TXD, &GPIO_InitStruct );    /* Configure USART1 Rx (PA10) as input floating */    GPIO_InitStruct.GPIO_Pin = PIN_USART1_RXD;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;    GPIO_Init( PORT_USART1_RXD, &GPIO_InitStruct );    USART_StructInit(&USART_InitStruct);    USART_InitStruct.USART_BaudRate = 115200;    USART_InitStruct.USART_WordLength = USART_WordLength_8b;    USART_InitStruct.USART_StopBits = USART_StopBits_1;    USART_InitStruct.USART_Parity = USART_Parity_No ;    USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;    USART_Init(USART1, &USART_InitStruct);    /* Enable the USARTx Interrupt */#if 1//  USART_ITConfig(USART2, USART_IT_TXE, ENABLE);    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);    NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn;    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;    NVIC_Init(&NVIC_InitStruct);#endif    USART_Cmd(USART1, ENABLE);

串口2初始化

    USART_InitTypeDef USART_InitStruct;    GPIO_InitTypeDef GPIO_InitStruct;    NVIC_InitTypeDef NVIC_InitStruct;    RCC_APB1PeriphClockCmd( RCC_APB1Periph_USART2, ENABLE );    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;    /* Configure USART2 CTS (PA0) as input floating */#if UART2_HARDWARE_FLOW    GPIO_InitStruct.GPIO_Pin = PIN_USART2_CTS;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;    GPIO_Init( PORT_USART2_CTS, &GPIO_InitStruct );#endif    /* Configure USART2 Rx (PA3) as input floating */    GPIO_InitStruct.GPIO_Pin = PIN_USART2_RXD;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;    GPIO_Init( PORT_USART2_RXD, &GPIO_InitStruct );    /* Configure USART2 RTS (PA1) as alternate function push-pull */#if UART2_HARDWARE_FLOW    GPIO_InitStruct.GPIO_Pin = PIN_USART2_RTS;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;    GPIO_Init( PORT_USART2_RTS, &GPIO_InitStruct );#endif    /* Configure USART2 Tx (PA2) as alternate function push-pull */    GPIO_InitStruct.GPIO_Pin = PIN_USART2_TXD;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;    GPIO_Init( PORT_USART2_TXD, &GPIO_InitStruct );    USART_StructInit(&USART_InitStruct);    USART_InitStruct.USART_BaudRate = 115200;    USART_InitStruct.USART_WordLength = USART_WordLength_8b;    USART_InitStruct.USART_StopBits = USART_StopBits_1;    USART_InitStruct.USART_Parity = USART_Parity_No ;    USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;#if UART2_HARDWARE_FLOW    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_RTS;#else    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;#endif    USART_Init(USART2, &USART_InitStruct);#if 1//  USART_ITConfig(USART2, USART_IT_TXE, ENABLE);    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);    NVIC_InitStruct.NVIC_IRQChannel = USART2_IRQn;    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;    NVIC_Init(&NVIC_InitStruct);#endif    USART_Cmd(USART2, ENABLE);

串口3初始化

    USART_InitTypeDef USART_InitStruct;    GPIO_InitTypeDef GPIO_InitStruct;    NVIC_InitTypeDef NVIC_InitStruct;    RCC_APB1PeriphClockCmd( RCC_APB1Periph_USART3, ENABLE );    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;    /* Configure USART1 Tx (PC10) as alternate function push-pull */    GPIO_InitStruct.GPIO_Pin = PIN_UART3_TXD;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;    GPIO_Init( PORT_UART3_TXD, &GPIO_InitStruct );    /* Configure USART1 Rx (PC11) as input floating */    GPIO_InitStruct.GPIO_Pin = PIN_UART3_RXD;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;    GPIO_Init( PORT_UART3_RXD, &GPIO_InitStruct );    USART_StructInit(&USART_InitStruct);    USART_InitStruct.USART_BaudRate = 115200;    USART_InitStruct.USART_WordLength = USART_WordLength_8b;    USART_InitStruct.USART_StopBits = USART_StopBits_1;    USART_InitStruct.USART_Parity = USART_Parity_No ;    USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;    USART_Init(USART3, &USART_InitStruct);    /* Enable the USARTx Interrupt */#if 1    USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);    NVIC_InitStruct.NVIC_IRQChannel = USART3_IRQn;    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;    NVIC_Init(&NVIC_InitStruct);#endif    USART_Cmd(USART3, ENABLE);

串口4初始化

    USART_InitTypeDef USART_InitStruct;    GPIO_InitTypeDef GPIO_InitStruct;    NVIC_InitTypeDef NVIC_InitStruct;    RCC_APB1PeriphClockCmd( RCC_APB1Periph_UART4, ENABLE );    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;#if 0    GPIO_InitStruct.GPIO_Pin = PIN_UART4_CTS;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;    GPIO_Init( PORT_UART4_CTS, &GPIO_InitStruct );//    GPIO_ResetBits(PORT_UART4_CTS,PIN_UART4_CTS);#endif    /* Configure USART1 Tx (PC10) as alternate function push-pull */    GPIO_InitStruct.GPIO_Pin = PIN_UART4_TXD;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;    GPIO_Init( PORT_UART4_TXD, &GPIO_InitStruct );    /* Configure USART1 Rx (PC11) as input floating */    GPIO_InitStruct.GPIO_Pin = PIN_UART4_RXD;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;    GPIO_Init( PORT_UART4_RXD, &GPIO_InitStruct );    USART_StructInit(&USART_InitStruct);    USART_InitStruct.USART_BaudRate = 115200;    USART_InitStruct.USART_WordLength = USART_WordLength_8b;    USART_InitStruct.USART_StopBits = USART_StopBits_1;    USART_InitStruct.USART_Parity = USART_Parity_No ;    USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;    USART_Init(UART4, &USART_InitStruct);    /* Enable the USARTx Interrupt */#if 1//  USART_ITConfig(USART2, USART_IT_TXE, ENABLE);    USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);    NVIC_InitStruct.NVIC_IRQChannel = UART4_IRQn;    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;    NVIC_Init(&NVIC_InitStruct);#endif    USART_Cmd(UART4, ENABLE);

串口5初始化

    USART_InitTypeDef USART_InitStruct;    GPIO_InitTypeDef GPIO_InitStruct;    NVIC_InitTypeDef NVIC_InitStruct;    RCC_APB1PeriphClockCmd( RCC_APB1Periph_UART5, ENABLE );    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;    /* Configure USART1 Tx (PC10) as alternate function push-pull */    GPIO_InitStruct.GPIO_Pin = PIN_UART5_TXD;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;    GPIO_Init( PORT_UART5_TXD, &GPIO_InitStruct );    /* Configure USART1 Rx (PC11) as input floating */    GPIO_InitStruct.GPIO_Pin = PIN_UART5_RXD;    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;    GPIO_Init( PORT_UART5_RXD, &GPIO_InitStruct );    USART_StructInit(&USART_InitStruct);    USART_InitStruct.USART_BaudRate = 115200;    USART_InitStruct.USART_WordLength = USART_WordLength_8b;    USART_InitStruct.USART_StopBits = USART_StopBits_1;    USART_InitStruct.USART_Parity = USART_Parity_No ;    USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;    USART_Init(UART5, &USART_InitStruct);    /* Enable the USARTx Interrupt */#if 1    USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);    NVIC_InitStruct.NVIC_IRQChannel = UART5_IRQn;    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;    NVIC_Init(&NVIC_InitStruct);#endif    USART_Cmd(UART5, ENABLE);

中断处理

void USART_Irq_Function(UART_STRUCT *uart,USART_TypeDef *uartdef){    //接收到数据USART_ GetITStatus    while (USART_GetITStatus(uartdef, USART_IT_RXNE))    {        Uchar temp;        USART_ClearFlag(uartdef, USART_FLAG_RXNE | USART_FLAG_ORE);        temp = USART_ReceiveData(uartdef);        if (((uart->rxHead + 1) % UART_RXBUFFERLEN) != uart->rxTail)        {            uart->rxBuf[uart->rxHead] = temp;            uart->rxHead = (uart->rxHead + 1) % UART_RXBUFFERLEN;            uart->rxTimeOut = uart->rxTimeOut_Base;        }    }    //发送数据    if (USART_GetITStatus(uartdef,USART_IT_TXE))    {        // USART_ClearFlag(uartdef, USART_FLAG_TXE);        if (uart->txHead == uart->txTail)        {            uart->txEmpty = TRUE;            USART_ITConfig(uartdef, USART_IT_TXE, DISABLE);        }        else        {            USART_SendData(uartdef, uart->txBuf[uart->txTail]);            uart->txTail = (uart->txTail + 1) & (UART_TXBUFFERLEN - 1);            uart->txIdleTimeOut = uart->txIdleTimeOut_Base;        }    }}extern void USART1_IRQHandler(void){    USART_Irq_Function(&uart1,USART1);}extern void USART2_IRQHandler(void){    USART_Irq_Function(&uart2,USART2);}extern void USART3_IRQHandler(void){#ifdef INCLUDE_UARTPORT3    USART_Irq_Function(&uart3,USART3);#endif}extern void UART4_IRQHandler(void){#ifdef INCLUDE_UARTPORT4    USART_Irq_Function(&uart4,UART4);#endif}extern void UART5_IRQHandler(void){#ifdef INCLUDE_UARTPORT5    USART_Irq_Function(&uart5,UART5);#endif}

超时检查

//函  数:检查是否有收到数据包，1ms调用一次//参  数无//返  回:无extern void checkUartRxTimeOut(){    if (uart1.rxTimeOut)    {        if (--uart1.rxTimeOut == 0)        {            pushEvent(evCOM1,uart1.rxHead);        }    }    if (uart2.rxTimeOut)    {        if (--uart2.rxTimeOut == 0)        {            pushEvent(evCOM2,uart2.rxHead);        }    }    if (uart3.rxTimeOut)    {        if (--uart3.rxTimeOut == 0)        {            pushEvent(evCOM3,uart3.rxHead);        }    }    if (uart4.rxTimeOut)    {        if (--uart4.rxTimeOut == 0)        {            pushEvent(evCOM4,uart4.rxHead);        }    }    if (uart5.rxTimeOut)    {        if (--uart5.rxTimeOut == 0)        {            pushEvent(evCOM5,uart5.rxHead);        }    }    if (uart1.txIdleTimeOut) uart1.txIdleTimeOut--;    if (uart2.txIdleTimeOut) uart2.txIdleTimeOut--;#ifdef INCLUDE_UARTPORT3    if (uart3.txIdleTimeOut) uart3.txIdleTimeOut--;#endif#ifdef INCLUDE_UARTPORT4    if (uart4.txIdleTimeOut) uart4.txIdleTimeOut--;#endif#ifdef INCLUDE_UARTPORT5    if (uart5.txIdleTimeOut) uart5.txIdleTimeOut--;#endif}

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