/** * This function is wait for modbus master request finish and return result. * Waiting result include request process success, request respond timeout, * receive data error and execute function error.You can use the above callback function. * @note If you are use OS, you can use OS's event mechanism. Otherwise you have to run * much user custom delay for waiting. * * @return request error code */ eMBMasterReqErrCode eMBMasterWaitRequestFinish( void ) { eMBMasterReqErrCode eErrStatus = MB_MRE_NO_ERR; eMBMasterEventType recvedEvent; xMBMasterPortEventGet(&recvedEvent); switch (recvedEvent) { case EV_MASTER_PROCESS_SUCESS: break; case EV_MASTER_ERROR_RESPOND_TIMEOUT: { eErrStatus = MB_MRE_TIMEDOUT; break; } case EV_MASTER_ERROR_RECEIVE_DATA: { eErrStatus = MB_MRE_REV_DATA; break; } case EV_MASTER_ERROR_EXECUTE_FUNCTION: { eErrStatus = MB_MRE_EXE_FUN; break; } } return eErrStatus; }
eMBErrorCode eMBMasterPoll( void ) { static UCHAR *ucMBFrame; static UCHAR ucRcvAddress; static UCHAR ucFunctionCode; static USHORT usLength; static eMBException eException; // int i; eMBErrorCode eStatus = MB_ENOERR; eMBMasterEventType eEvent; /* Check if the protocol stack is ready. */ if( eMBState != STATE_ENABLED ) { return MB_EILLSTATE; } /* Check if there is a event available. If not return control to caller. * Otherwise we will handle the event. */ if( xMBMasterPortEventGet( &eEvent ) == TRUE ) { switch ( eEvent ) { case EV_MASTER_READY: break; case EV_MASTER_FRAME_RECEIVED: eStatus = peMBMasterFrameReceiveCur( &ucRcvAddress, &ucMBFrame, &usLength ); if ( eStatus == MB_ENOERR ) { ( void ) xMBMasterPortEventPost( EV_MASTER_EXECUTE ); } else { ( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS ); } #if 0 /* Check if the frame is for us. If not ,send an error process event. */ if ( ( eStatus == MB_ENOERR ) && ( ucRcvAddress == ucMBMasterGetDestAddress() ) ) { ( void ) xMBMasterPortEventPost( EV_MASTER_EXECUTE ); } else { ( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS ); } #endif break; case EV_MASTER_EXECUTE: //接受到了一帧RTU 数据 //Mb2TcpBuff[256]; if(usLength<256) { Mb2TcpLenth=usLength;//更新接受到的数据长度,准备启动TCP发送 Mb2TcpBuff[0]=0xFF; Mb2TcpBuff[1]=0x55; Mb2TcpBuff[2]=Statues_MB; Mb2TcpBuff[3]=UID_STM32[0]; Mb2TcpBuff[4]=UID_STM32[1]; Mb2TcpBuff[5]=UID_STM32[2]; memcpy(&Mb2TcpBuff[6],ucMBFrame,Mb2TcpLenth);//数据复制进TCP发送buf中 Mb2TcpBuff[Mb2TcpLenth+6]=0x24; Mb2TcpBuff[Mb2TcpLenth+6+1]=0x0d; Mb2TcpBuff[Mb2TcpLenth+6+2]=0x0a; Mb2TcpLenth+=9; } eException = MB_EX_ILLEGAL_FUNCTION; #if 0 ucFunctionCode = ucMBFrame[MB_PDU_FUNC_OFF]; eException = MB_EX_ILLEGAL_FUNCTION; for( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ ) { // No more function handlers registered. Abort. if( xMasterFuncHandlers[i].ucFunctionCode == 0 ) { break; } else if( xMasterFuncHandlers[i].ucFunctionCode == ucFunctionCode ) { vMBMasterSetCBRunInMasterMode(TRUE); eException = xMasterFuncHandlers[i].pxHandler( ucMBFrame, &usLength ); vMBMasterSetCBRunInMasterMode(FALSE); break; } } /* If receive frame has exception .The receive function code highest bit is 1.*/ if(ucFunctionCode >> 7) eException = (eMBException)ucMBFrame[MB_PDU_DATA_OFF]; /* If master has exception ,Master will send error process.Otherwise the Master is idle.*/ if (eException != MB_EX_NONE) ( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS ); else vMBMasterSetIsBusy( FALSE ); #endif break; case EV_MASTER_FRAME_SENT: /* Master is busy now. */ vMBMasterSetIsBusy( TRUE ); vMBMasterGetPDUSndBuf( &ucMBFrame ); eStatus = peMBMasterFrameSendCur( ucMBMasterGetDestAddress(), ucMBFrame, ucMBMasterGetPDUSndLength() ); break; case EV_MASTER_ERROR_PROCESS: vMBMasterSetIsBusy( FALSE ); break; } } return MB_ENOERR; }
eMBErrorCode eMBMasterPoll( void ) { static UCHAR *ucMBFrame; static UCHAR ucRcvAddress; static UCHAR ucFunctionCode; static USHORT usLength; static eMBException eException; int i , j; eMBErrorCode eStatus = MB_ENOERR; eMBMasterEventType eEvent; eMBMasterErrorEventType errorType; /* Check if the protocol stack is ready. */ if( eMBState != STATE_ENABLED ) { return MB_EILLSTATE; } /* Check if there is a event available. If not return control to caller. * Otherwise we will handle the event. */ if( xMBMasterPortEventGet( &eEvent ) == TRUE ) { switch ( eEvent ) { case EV_MASTER_READY: break; case EV_MASTER_FRAME_RECEIVED: eStatus = peMBMasterFrameReceiveCur( &ucRcvAddress, &ucMBFrame, &usLength ); /* Check if the frame is for us. If not ,send an error process event. */ if ( ( eStatus == MB_ENOERR ) && ( ucRcvAddress == ucMBMasterGetDestAddress() ) ) { ( void ) xMBMasterPortEventPost( EV_MASTER_EXECUTE ); } else { vMBMasterSetErrorType(EV_ERROR_RECEIVE_DATA); ( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS ); } break; case EV_MASTER_EXECUTE: ucFunctionCode = ucMBFrame[MB_PDU_FUNC_OFF]; eException = MB_EX_ILLEGAL_FUNCTION; /* If receive frame has exception .The receive function code highest bit is 1.*/ if(ucFunctionCode >> 7) { eException = (eMBException)ucMBFrame[MB_PDU_DATA_OFF]; } else { for (i = 0; i < MB_FUNC_HANDLERS_MAX; i++) { /* No more function handlers registered. Abort. */ if (xMasterFuncHandlers[i].ucFunctionCode == 0) { break; } else if (xMasterFuncHandlers[i].ucFunctionCode == ucFunctionCode) { vMBMasterSetCBRunInMasterMode(TRUE); /* If master request is broadcast, * the master need execute function for all slave. */ if ( xMBMasterRequestIsBroadcast() ) { usLength = usMBMasterGetPDUSndLength(); for(j = 1; j <= MB_MASTER_TOTAL_SLAVE_NUM; j++){ vMBMasterSetDestAddress(j); eException = xMasterFuncHandlers[i].pxHandler(ucMBFrame, &usLength); } } else { eException = xMasterFuncHandlers[i].pxHandler(ucMBFrame, &usLength); } vMBMasterSetCBRunInMasterMode(FALSE); break; } } } /* If master has exception ,Master will send error process.Otherwise the Master is idle.*/ if (eException != MB_EX_NONE) { vMBMasterSetErrorType(EV_ERROR_EXECUTE_FUNCTION); ( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS ); } else { vMBMasterCBRequestScuuess( ucMBMasterGetDestAddress()); vMBMasterRunResRelease( ); } break; case EV_MASTER_FRAME_SENT: /* Master is busy now. */ vMBMasterGetPDUSndBuf( &ucMBFrame ); eStatus = peMBMasterFrameSendCur( ucMBMasterGetDestAddress(), ucMBFrame, usMBMasterGetPDUSndLength() ); break; case EV_MASTER_ERROR_PROCESS: /* Execute specified error process callback function. */ errorType = eMBMasterGetErrorType(); vMBMasterGetPDUSndBuf( &ucMBFrame ); switch (errorType) { case EV_ERROR_RESPOND_TIMEOUT: vMBMasterErrorCBRespondTimeout(ucMBMasterGetDestAddress(), ucMBFrame, usMBMasterGetPDUSndLength()); break; case EV_ERROR_RECEIVE_DATA: vMBMasterErrorCBReceiveData(ucMBMasterGetDestAddress(), ucMBFrame, usMBMasterGetPDUSndLength()); break; case EV_ERROR_EXECUTE_FUNCTION: vMBMasterErrorCBExecuteFunction(ucMBMasterGetDestAddress(), ucMBFrame, usMBMasterGetPDUSndLength()); break; } vMBMasterRunResRelease(); break; } }