LabWindows/CVI教程(6)串行口和網絡通訊主講：喬立巖Email:qiaoliyan@(交作業）

MSN:qiaoliyan@（在線交流）Tel:86413532ext.8611（逸夫樓611）5/19/2023串行口通訊RS-232端口定義載波檢測接收數據發送數據數據終端就緒信號地數據裝置就緒請求發送清除發送振鈴指示1234567895/19/2023數據傳輸格式電氣特性負邏輯：1＝-5V~-15V,0=+5V~+15V最高速率：20kbit/s最遠距離：15m起始位奇偶校驗位停止位ASCII碼5/19/2023打開配置和關閉intOpenComConfig(intCOM_Port,charDevice_Name[],longBaud_Rate,intParity,intData_Bits,intStop_Bits,intInput_Queue_Size,intOutput_Queue_Size);i=OpenComConfig(1,“”,14400,0,7,1,512,512);intCloseCom(intCOM_Port);i=CloseCom(1);讀寫intComRd(intCOM_Port,charBuffer[],intCount);i=ComRd(1,buf,128);intComWrt(intCOM_Port,charBuffer[],intCount);i=ComWrt(1,buf,128);intComRdByte(intCOM_Port);intComWrtByte(intCOM_Port,intByte);控制intFlushInQ(intCOM_Port);intFlushOutQ(intCOM_Port);5/19/2023狀態查詢intGetInQLen(intCOM_Port);i=GetInQLen(1);intGetOutQLen(intCOM_Port);i=GetOutQLen(1);事件處理intInstallComCallback(intCOM_Port,intEvent_Mask,intNotify_Count,intEvent_Character,ComCallbackPtrCallback_Function,void*Callback_Data);

notifyCount=50;//Waitforatleast50bytesinqueueeventChar=13;//WaitforLFeventMask=LWRS_RXFLAG|LWRS_RECEIVE;InstallComCallback(comport,eventMask,notifyCount,eventChar,ComCallbackFunction,NULL);5/19/2023網絡通訊TCP協議（TransmissionControlProtocol傳輸控制協議）使用TCP進行網絡通信時每個連接包括一個服務器和一個客戶。TCP服務器能通過網絡向客戶應用程序發送數據或從客戶應用程序接收數據，客戶應用程序也可以向服務器應用程序發送數據或從服務器應用程序接收數據；TCP服務器應用程序一旦向系統注冊，就等待客戶應用程序的連接請求；而客戶應用程序只能向已經存在的服務器應用程序請求連接。每個TCP服務器需要主機名(如：aaa.bbb.ccc)或主機IP地址(如：123.456.78.90)和這個主機的唯一端口號5/19/2023服務器函數intRegisterTCPServer(unsignedintPort_Number,tcpFuncPtrCallback_Function,void*Callback_Data);i=RegisterTCPServer(200,ServerTCPCB,0);回調函數：int(*tcpFuncPtr)(unsignedhandle,intxType,interrCode,void*callbackData);TCP_CONNECTTCP_DISCONNECTTCP_DATAREADYintCVICALLBACKServerTCPCB(unsignedhandle,intevent,interror,void*callbackData);intUnregisterTCPServer(unsignedintPort_Number);intServerTCPRead(unsignedintConversation_Handle,void*Data_Buffer,unsignedintData_Size,unsignedintTime_Out);dataSize=ServerTCPRead(g_hconversation,receiveBuf,dataSize,1000);5/19/2023intServerTCPWrite(unsignedintConversation_Handle,void*Data_Pointer,unsignedintData_Size,unsignedintTime_Out);i=ServerTCPWrite(g_hconversation,transmitBuf,strlen(transmitBuf)+1,1000);intDisconnectTCPClient(unsignedintConversation_Handle);客戶機函數intConnectToTCPServer(unsignedint*Conversation_Handle,unsignedintPort_Number,charServer_Host_Name[],tcpFuncPtrCallback_Function,void*Callback_Data,unsignedintTime_Out);i=ConnectToTCPServer(&g_hconversation,200,tempBuf,ClientTCPCB,NULL,5000);回調函數：int(*tcpFuncPtr)(unsignedhandle,intxType,interrCode,void*callbackData);intCVICALLBACKClientTCPCB(unsignedhandle,intevent,interror,void*callbackData);TCP_DISCONNECTTCP_DATAREADY5/19/2023intDisconnectFromTCPServer(unsignedintConversation_Handle);intClientTCPRead(unsignedintConversation_Handle,void*Data_Buffer,unsignedintData_Size,unsignedintTime_Out);i=ClientTCPRead(g_hconversation,receiveBuf,dataSize,1000);intClientTCPWrite(unsignedintConversation_Handle,void*Data_Pointer,unsignedintData_Size,unsignedintTime_Out);ClientTCPWrite(g_hconversation,transmitBuf,strlen(transmitBuf)+1,1000);支持函數intGetTCPHostAddr(charBuffer[],intBuffer_Size);intGetTCPHostName(charBuffer[],intBuffer_Size);intGetTCPPeerAddr(unsignedintConnection_Handle,charBuffer[],intBuffer_Size);intGetTCPPeerName(unsignedintConnection_Handle,charBuffer[],intBuffer_Size);5/19/2023DataSocketNI公司定義的網絡數據通訊協議DataSocket庫為NI的DataSocket編程提供了支持，也簡化了應用程