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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