labwindowscvi串行口通信和網(wǎng)絡(luò)數(shù)據(jù)傳輸

LabWindows/CVI教程(6)串行口和網(wǎng)絡(luò)通訊主講：?jiǎn)塘rEmail:qiaoliyan@(交作業(yè)）

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(cè)接收數(shù)據(jù)發(fā)送數(shù)據(jù)數(shù)據(jù)終端就緒信號(hào)地?cái)?shù)據(jù)裝置就緒請(qǐng)求發(fā)送清除發(fā)送振鈴指示1234567895/19/2023數(shù)據(jù)傳輸格式電氣特性負(fù)邏輯：1＝-5V~-15V,0=+5V~+15V最高速率：20kbit/s最遠(yuǎn)距離：15m起始位奇偶校驗(yàn)位停止位ASCII碼5/19/2023打開配置和關(guān)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(tài)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(wǎng)絡(luò)通訊TCP協(xié)議（TransmissionControlProtocol傳輸控制協(xié)議）使用TCP進(jìn)行網(wǎng)絡(luò)通信時(shí)每個(gè)連接包括一個(gè)服務(wù)器和一個(gè)客戶。TCP服務(wù)器能通過網(wǎng)絡(luò)向客戶應(yīng)用程序發(fā)送數(shù)據(jù)或從客戶應(yīng)用程序接收數(shù)據(jù)，客戶應(yīng)用程序也可以向服務(wù)器應(yīng)用程序發(fā)送數(shù)據(jù)或從服務(wù)器應(yīng)用程序接收數(shù)據(jù)；TCP服務(wù)器應(yīng)用程序一旦向系統(tǒng)注冊(cè)，就等待客戶應(yīng)用程序的連接請(qǐng)求；而客戶應(yīng)用程序只能向已經(jīng)存在的服務(wù)器應(yīng)用程序請(qǐng)求連接。每個(gè)TCP服務(wù)器需要主機(jī)名(如：aaa.bbb.ccc)或主機(jī)IP地址(如：123.456.78.90)和這個(gè)主機(jī)的唯一端口號(hào)5/19/2023服務(wù)器函數(shù)intRegisterTCPServer(unsignedintPort_Number,tcpFuncPtrCallback_Function,void*Callback_Data);i=RegisterTCPServer(200,ServerTCPCB,0);回調(diào)函數(shù)：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(jī)函數(shù)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(diào)函數(shù)：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(shù)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(wǎng)絡(luò)數(shù)據(jù)通訊協(xié)議DataSocket庫(kù)為NI的DataSocket編程提供了支持，也簡(jiǎn)化了應(yīng)用程