STM32串口的LIN从模式完整代码

/* ********************************************************************************************** * DVG02项目的LIN总线分析文件 * 文件名称: LIN.c * 版本号 : V0.9 * 编写人 : Rock.Wu * 编写日期:2012-08-20 ********************************************************************************************** */ #define LIN_MODULE /*******************************包含的文件******************************/ #include <includes.h> #include <cpu.h> #include <LIN.h> /*******************************宏定义************************************/ #define BIT(A,B) ((A>>B)&0x01) #define LIN_RXCMD_BUF_SIZE 5 /*接受缓存大小10个报文*/ /*******************************数据类型定义***************************/ /*******************************变量定义*********************************/ enum LinState{ IDLE, SYNCH, ID_LEN, DATA_GET, CHECKSUM }; enum LinErrState{ NO_ERR, SYNC_ERR, ID_ERR, CHKSUM_ERR }; static INT8U AnalysePlus4 = IDLE; #if (LIN_LEN_MODE == 0) static const INT8U LIN_Len[4]={2, 2, 4, 8}; #endif static LINDataType TempLinData; LINDataType LINRxMsgBuf[LIN_RXCMD_BUF_SIZE]; COMM_LIN_Q LIN_RxMsg; extern CMD_LINType const LIN_CMD[LIN_ID_NUM]; static INT8U SendDataLen =0; static INT8U LinSendBuf[9]={0,0,0,0,0,0,0,0,0}; /*******************************函数声明*********************************/ static void LIN_IRQ_Handler(void); static void LIN_Rx_Analyse(INT8U LIN_Data); /****************************************************************************** ** 功能描述: 初始化UART4,用于与LIN通讯 ** 输　 入: ** 全局变量: UART1Sem ** 调用模块: ** 编写人 : Rock.Wu ** 编写日期:2012-09-14 *******************************************************************************/ void BSP_LIN_Init(void) { USART_InitTypeDef USART_InitStructure;/*串口设置恢复默认参*/ GPIO_InitTypeDef GPIO_InitStructure; INT8U i,j; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); 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_IN_FLOATING; GPIO_Init(GPIOC, &GPIO_InitStructure); RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE); USART_InitStructure.USART_BaudRate = 19200; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_Init(UART4, &USART_InitStructure); USART_LINBreakDetectLengthConfig(UART4, USART_LINBreakDetectLength_11b); USART_LINCmd(UART4, ENABLE); USART_Cmd(UART4, ENABLE); USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);/*先使能接收中断*/ USART_ITConfig(UART4, USART_IT_TXE, DISABLE); /*先禁止发送中断*/ USART_ITConfig(UART4, USART_IT_LBD, ENABLE);/*先使能LIN间隔场检测到中断*/ BSP_IntVectSet(BSP_INT_ID_UART4, LIN_IRQ_Handler); BSP_IntPrioSet(BSP_INT_ID_UART4, 1); BSP_IntEn(BSP_INT_ID_UART4); TempLinData.ErrorType = NO_ERR; for(i=0;i<LIN_RXCMD_BUF_SIZE;i++) /*初始化接收队列数据*/ { LINRxMsgBuf[i].CMD_ID = 0; LINRxMsgBuf[i].Len = 0; for(j=0;j<8;j++) LINRxMsgBuf[i].Data[j]=0; } COMM_LIN_QCreate(&LIN_RxMsg, LINRxMsgBuf, LIN_RXCMD_BUF_SIZE); /*创建队列*/ } /************************************************************************************** ** 功能描述: UART4 LIN 通讯接收发送中断服务程序 ** 全局变量: ** 调用模块: ** 编写人 : Rock.Wu ** 编写日期:2012-09-14 **************************************************************************************/ static void LIN_IRQ_Handler(void) { if(USART_GetITStatus(UART4, USART_IT_LBD) != RESET) { USART_ClearITPendingBit(UART4, USART_IT_LBD);/*清除LIN间隔场检测标志*/ AnalysePlus4 = SYNCH;/*确认检测到间隔场下一个开始接收 的是同步场数据*/ TempLinData.ErrorType = NO_ERR; TempLinData.WorkMode = SLAVE_IDLE; USART_ITConfig(UART4, USART_IT_TXE, DISABLE); /*先禁止发送中断*/ } if(USART_GetITStatus(UART4, USART_IT_RXNE) != RESET) { USART_ClearITPendingBit(UART4, USART_IT_RXNE);/*清除接收中断标志*/ LIN_Rx_Analyse((INT8U)USART_ReceiveData(UART4)); } /*溢出-如果发生溢出需要先读SR,再读DR寄存器则可清除不断入*/ if(USART_GetFlagStatus(UART4, USART_FLAG_ORE)==SET) { USART_ClearFlag(UART4, USART_FLAG_ORE); /*读SR其实就是清除标志*/ USART_ReceiveData(UART4);/*读DR*/ } if(USART_GetITStatus(UART4, USART_IT_TXE) != RESET) { USART_ClearITPendingBit(UART4, USART_IT_TXE);/*清除接收中断标志*/ if((LINTempData.WorkMode == SLAVE_TX_MODE)&&(SendDataLen != 0)) { SendDataLen--;/*这个必须防在先面的发送函数前才能得到 正确的数据，因为之前它加了1*/ USART_SendData(UART4, ((u16) LinSendBuf[SendDataLen])); }else{ SendDataLen = 0; LINTempData.WorkMode = SLAVE_IDLE; USART_ITConfig(UART4, USART_IT_TXE, DISABLE); /*先禁止发送中断*/ } } } /************************************************************************************** ** 功能描述: UART4 LIN 通讯接收解析服务程序 ** 全局变量: ** 调用模块: ** 编写人 : Rock.Wu ** 编写日期:2012-09-17 **************************************************************************************/ static void LIN_Rx_Analyse(INT8U LIN_Data) { INT8U TempData = 0, TempNum = 0; static INT8U TempLen = 0; static INT16U TempCheckSum = 0; switch(AnalysePlus4) { case 1: if(LIN_Data == 0x55) { AnalysePlus4 = ID_LEN;/*下一个将接收ID信息*/ }else{ AnalysePlus4 = IDLE; TempLinData.ErrorType = SYNC_ERR; } break; case 2: TempData = (~(BIT(LIN_Data,1)^BIT(LIN_Data,3)^BIT(LIN_Data,4)^BIT(LIN_Data,5)))<<7; TempData |= (BIT(LIN_Data,0)^BIT(LIN_Data,1)^BIT(LIN_Data,2)^BIT(LIN_Data,4))<<6; if(TempData == (LIN_Data&0xC0)) { TempLinData.CMD_ID = LIN_Data; #if (LIN_CHECKSUM_MODE == 0) TempCheckSum = 0; #else TempCheckSum = TempLinData.CMD_ID; #endif for(TempNum = 0; TempNum < LIN_ID_NUM; TempNum++) { if(TempLinData.CMD_ID == LIN_ID_List[TempNum][0]) { TempLinData.WorkMode = LIN_ID_List[TempNum][1]; #if (LIN_LEN_MODE == 0) TempLinData.Len = LIN_Len[((LIN_Data>>4)&0x03)]; #else TempLinData.Len = LIN_ID_List[TempNum][2]; #endif if(TempLinData.WorkMode == SLAVE_RX_MODE) { TempLen = 1;