LIN通信协议栈

/*************************************************************************** Author:Huanglongjie Date:2016-12-13 功能:LIN中间层 Version:1.0 NOTE:加快LIN中间层模块移植，此模块暂无主模式节点状态查询功能[LIN软件协议栈] Update: 更新日志: ****************************************************************************/ #include "lin_mid_structure.h" #include "mb96f683_lin_base_program.h" #include "mb96f683rb_base_layer_program.h" #include "panle.h" #define UINT unsigned int #define UCHAR unsigned char #define ULONG unsigned long /******************************局部静态函数声明*****************************/ static void Lin_Switch_SendOrReceive(UCHAR Lin_Pid_Temp); static void Write_Data_To_SendBuffer(unsigned char * Data,unsigned char Data_Lenth); static void Read_Buffer_Data(void); static void Clear_Lin_Frame_Buffer_Data_Field(void); static UCHAR Lin_Caculate_CheckSum(UCHAR Data_Length); /**********************************变量定义*********************************/ #if LIN_MODE == HOST const UCHAR Lin_Sch_Array[LIN_SCH_LEN] = {0};//调度表 #endif //数据类 struct LIN_FRAME_BUFFER Lin_Send_Data_Frame[LIN_SEND_DATA_FRAME_NUM]; struct LIN_FRAME_BUFFER Lin_Receive_Data_Frame[LIN_RECEIVE_DATA_FRAME_NUM]; struct LIN_FRAME_BUFFER Lin_Frame_Buffer;//LIN数据buffer static UCHAR UC_Lin_Frame_Buffer_Data_Field[8]; static UCHAR Lin_Sleep_DataArray[8]; //状态类 UCHAR Lin_RxTx_Status_Flag;// = CHECK_FIELD_RECEIVE_FINISH_IDLE; UCHAR Check_Sum_Flag; UCHAR Lin_Offline_Flag; static UCHAR Lin_Sch_Count; static UCHAR Lin_Ms_Counter; static UCHAR Lin_Offline_Sec_Counter; static UCHAR Lin_RxTx_Count; //外部变量 extern union LIN_28_TYPE Un_Lin_Send_Msg; extern union LIN_0C_TYPE Un_Lin_Rec_Msg; /**********************************函数实现*********************************/ /***************************************** Function Name: Lin_Application_Structure_Init() Engineer: created by Huanglongjie function: 链接应用层需要配置的相关参数 caution: 需要配置PID,数据长度等 *****************************************/ void Lin_Application_Structure_Init(void) { UCHAR i,j; //Buffer配置 Lin_Frame_Buffer.P_Data = UC_Lin_Frame_Buffer_Data_Field; //本地PID相关配置 Lin_Send_Data_Frame[0].Pid = 0xa8; Lin_Send_Data_Frame[0].Dlc = 8; Lin_Send_Data_Frame[0].P_Data = Un_Lin_Send_Msg.UC_Byte_Data; //异地接收PID配置 Lin_Receive_Data_Frame[0].Pid = 0x80; Lin_Receive_Data_Frame[0].Dlc = 8; Lin_Receive_Data_Frame[0].P_Data = Un_Lin_Rec_Msg.UC_Byte_Data; } /***************************************** Function Name: Lin_Mid_Structure_Init() Engineer: created by Huanglongjie function: LIN中间层初始化 caution: none *****************************************/ void Lin_Mid_Structure_Init(void) { Lin_RxTx_Status_Flag = LIN_IDLE; Lin_RxTx_Count = 0; Check_Sum_Flag = CHECK_ERROR; Lin_Offline_Sec_Counter = LIN_OFFLINE_DELAY; Lin_Sch_Count = 0; Lin_Ms_Counter = 100;//主模式时初始化200ms后开始正常工作 } /***************************************** Function Name: Lin_Sleep_Deal() Engineer: created by Huanglongjie function: 用于LIN掉线网络从节点睡眠 caution: [从节点收到LIN调度开始清计时， 主节点从收到从任一节点LIN正 确响应开始清计时] *****************************************/ void Lin_Sleep_Deal(void) { UCHAR i,k; i = 0; if(Lin_Offline_Sec_Counter == 0) Lin_Offline_Flag = LIN_OFFLINE; else { if(Lin_Sleep_DataArray[0] == 0x00) i++; for(k=1;k<8;k++) { if(Lin_Sleep_DataArray[k] == 0xff) i++; } if(i == 8) Lin_Offline_Flag = LIN_OFFLINE; else Lin_Offline_Flag = LIN_ONLINE; } } /***************************************** Function Name: Lin_Service() Engineer: created by Huanglongjie function: LIN服务函数放在中断中 caution: none *****************************************/ void Lin_Service(void) { UCHAR Lin_TxRx_Buffer,i; Lin_TxRx_Buffer = 0xff; #if LIN_MODE == SLAVE//从模式刷新离线计时 { Lin_Offline_Sec_Counter = LIN_OFFLINE_DELAY; } #endif Lin_TxRx_Buffer = Lin_Read_Data();//读数据【注意这个函数必须在Lin_Clear_Flag之前，以免读之前数据已经被读过一次清掉了】 if(Lin_Read_Break_Flag() == REC_BREAK_FRAME_FLAG) { Lin_RxTx_Status_Flag = BREAK_FIELD_RECEIVE_FINISH; Lin_Clear_Break_Flag(); Lin_Clear_Flag(); #if LIN_WORK_MODE == LIN_HOST_MODE Lin_Send_Data(SYNCHRO_FIELD_MSG); #endif return; } Lin_Clear_Flag(); //LIN状态流程跳转 switch(Lin_RxTx_Status_Flag) { case BREAK_FIELD_RECEIVE_FINISH://收到同步场 if(Lin_TxRx_Buffer == SYNCHRO_FIELD_MSG) { Lin_RxTx_Status_Flag = SYNCHRO_FIELD_RECEIVE_FINISH; #if LIN_WORK_MODE == LIN_HOST_MODE//主模式发送Pid { Lin_Send_Data(Lin_Sch_Array[Lin_Sch_Count]); Lin_Sch_Count++; if(Lin_Sch_Count == LIN_SCH_LEN) Lin_Sch_Count = 0; } #endif } break; case SYNCHRO_FIELD_RECEIVE_FINISH://收到Pid Lin_Frame_Buffer.Pid = Lin_TxRx_Buffer; Lin_Switch_SendOrReceive(Lin_Frame_Buffer.Pid);//分流函数 break; case LIN_DATA_SEND: if(Lin_TxRx_Buffer != (Lin_Frame_Buffer.P_Data[Lin_RxTx_Count - 1])) { ;//假如发送的数据场和收到的不一样如何处理！ } Lin_Send_Data(Lin_Frame_Buffer.P_Data[Lin_RxTx_Count]); Lin_RxTx_Count++; if(Lin_RxTx_Count == Lin_Frame_Buffer.Dlc) Lin_RxTx_Status_Flag = DATA_FIELD_FINISH; break; case LIN_DATA_RECEIVE: if(Lin_RxTx_Count < Lin_Frame_Buffer.Dlc) { Lin_Frame_Buffer.P_Data[Lin_RxTx_Count] = Lin_TxRx_Buffer; Lin_RxTx_Count++; if(Lin_RxTx_Count == Lin_Frame_Buffer.Dlc) { Lin_Frame_Buffer.CheckSum = (UCHAR)Lin_Caculate_CheckSum(Lin_Frame_Buffer.Dlc);//根据接收的数据算校验和 Lin_RxTx_Status_Flag = CHECK_FIELD_RECEIVE_FINISH; } } break; case LIN_DONT_DEAL_DATA: //本节点不需要要关心该节点数据，不做任何数据处理 return; break; case DATA_FIELD_FINISH: if(Lin_RxTx_Count == Lin_Frame_Buffer.Dlc) { Lin_Send_Data(Lin_Frame_Buffer.CheckSum); Lin_RxTx_Status_Flag = CHECK_FIELD_RECEIVE_FINISH; } break; case CHECK_FIELD_RECEIVE_FINISH: if(Lin_Frame_Buffer.CheckSum == Lin_TxRx_Buffer) { Check_Sum_Flag = CHECK_SUCCESS; Read_Buffer_Data(); //把校验成功的Buffer数据赋值给对应的变量空间 } else { Check_Sum_Flag = CHECK_ERROR; Clear_Lin_Frame_Buffer_Data_Field(); } Lin_RxTx_Status_Flag = LIN_IDLE; break; default://LIN_IDLE ; break; } } /***************************************** Function Name: Lin_Switch_SendOrReceive() Engineer: created by Huanglongjie function: 接收发送分流函数 caution: none *****************************************/ static void Lin_Switch_SendOrReceive(UCHAR Lin_Pid_Temp) { UCHAR i,k; Lin_RxTx_Count = 0; for(k = 0;k < LIN_SEND_DATA_FRAME_NUM;k++) //发送匹配 { if(Lin_Pid_Temp == Lin_Send_Data_Frame[k].Pid) { Lin_RxTx_Status_Flag = LIN_DATA_SEND; Clear_Lin_Frame_Buffer_Data_Field(); Write_Data_To_SendBuffer(Lin_Send_Data_Frame[k].P_Data,Lin_Send_Data_Frame[k].Dlc); //清数据[根据应用层需要添加的] for(i = 0;i < Lin_Send_Data_Frame[k].Dlc;i++) Lin_Send_Data_Frame[k].P_Data[i] = 0x00; // Lin_Frame_Buffer.CheckSum = (UCHAR)Lin_Caculate_CheckSum(Lin_Send_Data_Frame[k].Dlc); Lin_Frame_Buffer.Dlc = Lin_Send_Data_Frame[k].Dlc; Lin_Send_Data(Lin_Frame_Buffer.P_Data[Lin_RxTx_Count]);//发送状态，收到PID后直接发送第一个字节数据 Lin_RxTx_Count++; return; } } for(k = 0;k < LIN_RECEIVE_DATA_FRAME_NUM;k++) //接收匹配 { if(Lin_Pid_Temp == Lin_Receive_Data_Frame[k].Pid) { Lin_RxTx_Status_Flag = LIN_DATA_RECEIVE; Clear_Lin_Frame_Buffer_Data_Field(); //清空缓冲区域 Lin_Frame_Buff