串口的读取电子秤数值
#region 读取电子秤数值 private SerialPort com; private void getWeightfromCOM() { string COM ="COM1"; com = new SerialPort(COM); //实例化SerialPort并设置COM口 com.BaudRate = 9600;//波特率 com.Parity = Parity.None;//无奇偶校验位 com.StopBits = StopBits.Two;//两个停止位 com.Handshake = Handshake.RequestToSend;//控制协议 com.ReceivedBytesThreshold = 13;//设置 DataReceived 事件发生前内部输入缓冲区中的字节数,我这里是13字节为一组 com.Open(); //打开串口 com.DataReceived += new SerialDataReceivedEventHandler(Com_DataReceived); //接受数据线程 } /// <summary> /// 监听串口数据线程 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Com_DataReceived(object sender, SerialDataReceivedEventArgs e) { Thread.Sleep(500);//线程休眠500毫秒,方便接收串口的全部数据 try { if (com.IsOpen) { byte[] readBuffer = new byte[com.ReadBufferSize + 1]; try { int count = com.Read(readBuffer, 0, com.ReadBufferSize); //读取串口数据(监听) String SerialIn = System.Text.Encoding.ASCII.GetString(readBuffer, 0, count);//将字节数组解码为字符串 if (count != 0) { //这里强调一下,线程里不可以直接对UI进行赋值,只能使用委托操作控件 this.BeginInvoke(new System.Threading.ThreadStart(delegate () { rbResult.Text = SerialIn; })); } } catch (TimeoutException) { } } else { TimeSpan waitTime = new TimeSpan(0, 0, 0, 0, 50); Thread.Sleep(waitTime); } } catch (Exception ex) { MessageBox.Show(ex.ToString()); } } #endregion
转: https://www.cnblogs.com/wml-it/p/15982148.html