STM32串口通讯程序

将AVR上的队列串口驱动程序修改后，运行在STM32开发板，采用中断方式接收和中断发送，并加入了缓冲收发队列操作。

由于该驱动是用来操作西门子的TC35或MC55等通信模块，所以加入了“等待串口接收完成”函数，该函数需要一个10ms的定时进行计数累加。

#define SMS_UART0_c/***************************************************************************************** *********************** STM32 UART1 driver** File : UART0.c* By : hjjft**************************************************************************************** **********************//////////////////////////////////////////////////// 这里将串口1写作0，主要原因是AVR是串口0，为了方便移植，这里仍然称为串口0 ///////////////////////////////////////////////////static char UART0_RxBuf[UART0_RX_BUFFER_SIZE];static volatile unsigned char UART0_RxHead;//static volatile unsigned char UART0_RxTail;static char UART0_TxBuf[UART0_TX_BUFFER_SIZE];//static volatile unsigned char UART0_TxHead;static volatile unsigned char UART0_TxTail;//------------------------------------------------------------static volatile unsigned char Frame_counting;/******************************************************************************** Function Name : NVIC_Configuration* Description : Configures Vector Table base location.* Input : None* Output : None* Return : None*******************************************************************************/void NVIC_USART_Configuration(void){NVIC_InitTypeDef NVIC_InitStructure;/* Enable the USART1 Interrupt */NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel; // NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;NVIC_InitStructure.NVIC_IRQChannelSubPriority = 10;// NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStructure);}void GPIO_USART_Configuration(void){GPIO_InitTypeDef GPIO_InitStructure;/* Configure USART1 Tx (PA.09) as alternate function push-pull */ 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);/* Configure USART1 Rx (PA.10) as input floating */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure);}/******************************************************************************* * Function Name : USART_Configuration* Description : Configures the USART1.* Input : None* Output : None* Return : None*******************************************************************************/ void USART_Configuration(unsigned long baudrate){USART_InitTypeDef USART_InitStructure;USART_ClockInitTypeDef USART_ClockInitqlt;/* USART1 configuration ------------------------------------------------------*//* USART1 configured as follow:- BaudRate = 115200 baud- Word Length = 8 Bits- One Stop Bit- No parity- Hardware flow control disabled (RTS and CTS signals)- Receive and transmit enabled- USART Clock disabled- USART CPOL: Clock is active low- USART CPHA: Data is captured on the middle- USART LastBit: The clock pulse of the last data bit is not output tothe SCLK pin*/USART_ART_BaudRate = baudrate;USART_ART_WordLength = USART_WordLength_8b; USART_ART_StopBits = USART_StopBits_1;USART_ART_Parity = USART_Parity_No;USART_ART_HardwareFlowControl = USART_HardwareF lowControl_None;USART_ART_Mode = USART_Mode_Rx | USART_Mode _Tx; //USART_Init(USART1, &USART_InitStructure);USART_ART_Clock= USART_Clock_Disable;USART_ART_CPOL = USART_CPOL_Low; // USART_Cl ART_CPHA = USART_CPHA_2Edge; // USART_ClockInitqlt. USART_LastBit = USART_LastBit_Disable;//USART_ClockInit(USART1,&USART_ClockInitqlt);USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);USART_Cmd(USART1, ENABLE);//}//串口初始化void UART0_InitUART( unsigned long baudrate ){RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Peri ph_GPIOA, ENABLE);NVIC_USART_Configuration();GPIO_USART_Configuration();USART_Configuration(baudrate);UART0_RxTail = 0;UART0_RxHead = 0;UART0_TxTail = 0;UART0_TxHead = 0;}//--------------------------------------------------void SIGNAL_Usart0_RX(void) //接收中断{u8 data;u8 tmphead;data = USART_ReceiveData(USART1); //Frame_counting = 0;tmphead = ( UART0_RxHead + 1 ) & UART0_RX_BUFFER_MAS K; // UART0_RxHead = tmphead; //if ( tmphead == UART0_RxTail ){//这里加入队列溢出保护}UART0_RxBuf[tmphead] = data;}//--------------------------------------------------void SIGNAL_Usart0_TX(void) //发送中断{u8 tmptail;if ( UART0_TxHead != UART0_TxTail ){tmptail = ( UART0_TxTail + 1 ) & UART0_TX_BUFFER_MAS K; UART0_TxTail = tmptail;USART_SendData(USART1, UART0_TxBuf[tmptail]);}else{USART_ITConfig(USART1,USART_IT_TXE,DISABLE);// }}//从接收队列读取一个字符unsigned char UART0_ReceiveByte( void ){unsigned char tmptail;while ( UART0_RxHead == UART0_RxTail ); //tmptail = ( UART0_RxTail + 1 ) & UART0_RX_BUFFER_MASK;UART0_RxTail = tmptail;return UART0_RxBuf[tmptail];}//将一个字节放入发送队列void UART0_TransmitByte( char data ){unsigned char tmphead;tmphead = ( UART0_TxHead + 1 ) & UART0_TX_BUFFER_MASK;while ( tmphead == UART0_TxTail );UART0_TxBuf[tmphead] = data;UART0_TxHead = tmphead;USART_ITConfig(USART1,USART_IT_TXE,ENABLE);//}//发送一个字符串void UART0_Transmitstr( char *str) //{// unsigned int i="0";while(*str){UART0_TransmitByte(*str++);}}//清空接收缓冲区void UART0_ClearspatialReceiveBuffer(void){unsigned char x;x = 0;UART0_RxTail = x;UART0_RxHead = x;}//等待接收完成void UART0_RXEND(void){//UART0_Transmitstr("wite_start-");unsigned int x="0";while((!UART0_DataInReceiveBuffer())&(x<100))//{x++;DelayMs(10);//10ms}x=0;while((Frame_counting<2)&&(x<1000))//?D??êy?Y?óê?íê3é,×??à1sí?3?{x++;DelayMs(1);//1ms}}/******************************************************************************** Function Name : USART1_IRQHandler* Description : This function handles USART1 global interrupt request. * Input : None* Output : None* Return : None*******************************************************************************/void USART1_IRQHandler(void){if(USART_GetITStatus(USART1,USART_IT_RXNE)==SET){USART_ClearITPendingBit(USART1,USART_IT_RXNE);//SIGNAL_Usart0_RX();}if(USART_GetITStatus(USART1,USART_IT_TXE)==SET){USART_ClearITPendingBit(USART1,USART_IT_TXE); //SIGNAL_Usart0_TX();}}。