com.WriteTimeout =2000;//com.ReceivedBytesThreshold = 4;//设置 DataReceived 事件发生前内部输入缓冲区中的字节数// com.NewLine = "/r/n";com.RtsEnable =true; com.Open();//打开串口MessageBox.Show("串口打开成功"); }catch{ MessageBox.Show("串口已打开!"); } }//////监听com端口接收的报...
再一个需要设置的是端口的波特率,要保证和从机一致。使用串口取电的RS-232/RS-485转接卡时还要注意,部分转接卡可能从串口4脚和7脚取电,此时注意设置DTREnable、RTSEnable为True。其他不用设置,取默认值即可。©2022 Baidu |由 百度智能云 提供计算服务 | 使用百度前必读 | 文库协议 | 网站地图 | 百度营销...
à System.IO.Ports.InternalResources.WinIOError(Int32 errorCode, String str) à System.IO.Ports.SerialStream..ctor(String portName, Int32 baudRate, Parity parity, Int32 dataBits, StopBits stopBits, Int32 readTimeout, Int32 writeTimeout, Handshake handshake, Boolean dtrEnable, Boolean rtsEnable...
port 1.RtsEnable= true;//di 总线 port 1.DiscardlnBuffer( ) ;//删除缓冲区的数据 if( number > = 24) number = 1;//循环 24 个从机 buf send[ 0] = number;//从机地址 snumber= Convert.ToStri ng( number,lo) ; buffsend[ 1] = HexStri ngToBinary(TBfucnum.Text) ;//功能码 ...
"RTSEnable":false,"SpLinktimeout":"2000","SpIntertimeout":"-1","workMode":"read","readMode":"trigger","readCyc":"2000","vartable":[],"SiemensS7Model":"5","SiemensS7ConnectionType":"1","SiemensS7Rack":"0","SiemensS7Slot":"0","SiemensS7LocalTSAP":"0","SiemensS7DestTSAP":"0...
{ 170 171 sp.Parity=Parity.None; 172 } 173 sp.ReadTimeout=-1;//设置超时读取时间 174 sp.RtsEnable=true; 175 //定义DataReceived事件,当串口收到数据后触发事件 176 sp.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived); 177 if(rbnHex.Checked){ 178 isHex=true; 179 }else{...
sp.RtsEnable = true; //启用请求发送信号 sp.ReadTimeout = 1000; sp.WriteTimeout = 1000; sp.Open(); Status = AppStatus.监听; sp.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived); } catch { Status = AppStatus.停止; ...
serialPort.RtsEnable = true; 2.2串口数据发送和接收 发送数据通过SerialPort类的Write()方法来实现。接收数据有2种方法。一种是通过SerialPort的数据接收事件DataReceived,为该事件定义代理方法进行数据接收处理: serialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceived) 。这种方法编程简单,但从Seri...
com.RtsEnable = true; com.Open(); //打开串口 MessageBox.Show("串口打开成功"); } catch { MessageBox.Show("串口已打开!"); } } ////// 监听com端口接收的报文 /////////private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e) { try { StringBuilder strBuilder ...
{ 170 171 sp.Parity=Parity.None; 172 } 173 sp.ReadTimeout=-1;//设置超时读取时间 174 sp.RtsEnable=true; 175 //定义DataReceived事件,当串口收到数据后触发事件 176 sp.DataReceived += new SerialDataReceivedEventHandler(sp_DataReceived); 177 if(rbnHex.Checked){ 178 isHex=true; 179 }else{...