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第一次串口编程
public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } private SerialPort comm = new SerialPort(); string PortName = "COM1"; //串口地址 int BaudRate = 9600; //波特率 int _BytesToRead = 0; // bool _IsOpen = false; Timer timer = new Timer(); //定时器 private void button1_Click(object sender, RoutedEventArgs e) { timer.Start(); } void timer_Elapsed(object sender, ElapsedEventArgs e) { SendCmd(); } private void SendCmd() {
//设备地址 int node = 1;// int.Parse(txtnode.Text);
//执行操作 01：写 03：读 int cmd = 3;// int.Parse(txtcmd.Text);
//寄存器读写位置 int addr = 0;// int.Parse(txtaddr.Text);
//读写位数 int len = 1;// int.Parse(txtlen.Text); try { if(!comm.IsOpen) comm.Open(); byte stat = (byte)cmd;
//组织协议 byte[] res = SendTrainCyclostyle(node, null, addr, len, stat);
//写 comm.Write(res, 0, res.Length); } catch (Exception ex) { } } #region 校验 private static readonly byte[] aucCRCHi = { 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 }; private static readonly byte[] aucCRCLo = { 0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5, 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80, 0x40 }; /// <summary> /// CRC效验 /// </summary> /// <param name="pucFrame">效验数据</param> /// <param name="usLen">数据长度</param> /// <returns>效验结果</returns> public static int Crc16(byte[] pucFrame, int usLen) { int i = 0; byte ucCRCHi = 0xFF; byte ucCRCLo = 0xFF; UInt16 iIndex = 0x0000; while (usLen-- > 0) { iIndex = (UInt16)(ucCRCLo ^ pucFrame[i++]); ucCRCLo = (byte)(ucCRCHi ^ aucCRCHi[iIndex]); ucCRCHi = aucCRCLo[iIndex]; } return (ucCRCHi << 8 | ucCRCLo); } #endregion /// <summary> /// 主控方式 发送指令模板 /// </summary> /// <param name="node">节点</param> /// <param name="data">数据</param> /// <param name="addr">地址</param> /// <param name="con">变量各数</param> /// <param name="stat">功能码</param> /// <returns></returns> private static byte[] SendTrainCyclostyle(int node, byte[] data, int addr, int con, byte stat) { int crcVal = 0; byte[] headData = http://www.mamicode.com/SendTrainHead(node, addr, con, stat); //写首部分数据 byte[] headDataLen = SendTrainBytes(headData, ref con, stat); //计算数据的长度，有字节则写入。 byte[] res = new byte[headDataLen.Length + con + 2]; headDataLen.CopyTo(res, 0); if ((stat == MB_WRITE_MULTIPLE_REGS) || (stat == MB_WRITE_MULTIPLE_COILS)) Array.Copy(data, 0, res, headDataLen.Length, con); //把数据复制到数据中 crcVal = Crc16(res, res.Length - 2); res[res.Length - 2] = (byte)(crcVal & 0xFF); res[res.Length - 1] = (byte)(crcVal >> 8); return res; } /// <summary> /// 首部分数据 node:节点 /// </summary> /// <param name="addr">寄存器地址</param> /// <param name="len">数据长度，或单个数据</param> /// <param name="stat"></param> /// <returns></returns> private static byte[] SendTrainHead(int node, int addr, int len, byte stat) { byte[] head = new byte[6]; head[0] = Convert.ToByte(node); head[1] = stat; head[2] = (byte)(addr >> 8); head[3] = (byte)(addr & 0xFF); head[4] = (byte)(len >> 8); head[5] = (byte)(len & 0xFF); return head; } #region 常量定义 public const byte MB_READ_COILS = 0x01; //读线圈寄存器 public const byte MB_READ_DISCRETE = 0x02; //读离散输入寄存器 public const byte MB_READ_HOLD_REG = 0x03; //读保持寄存器 public const byte MB_READ_INPUT_REG = 0x04; //读输入寄存器 public const byte MB_WRITE_SINGLE_COIL = 0x05; //写单个线圈 public const byte MB_WRITE_SINGLE_REG = 0x06; //写单寄存器 public const byte MB_WRITE_MULTIPLE_COILS = 0x0f; //写多线圈 public const byte MB_WRITE_MULTIPLE_REGS = 0x10; //写多寄存器 private const int MB_MAX_LENGTH = 1200; //最大数据长度 private const int MB_SCI_MAX_COUNT = 15; //指令管道最大存放的指令各数 private const int MB_MAX_REPEAT_COUNT = 3; //指令最多发送次数 #endregion /// <summary> /// 计算数据长度 并在0x0f,0x10功能下 加载字节数 /// </summary> /// <param name="arr"></param> /// <param name="len"></param> /// <param name="stat"></param> /// <returns></returns> private static byte[] SendTrainBytes(byte[] arr, ref int len, byte stat) { byte[] res; switch (stat) { default: len = 0; break; case MB_READ_COILS: case MB_READ_DISCRETE: case MB_READ_HOLD_REG: case MB_READ_INPUT_REG: case MB_WRITE_SINGLE_COIL: case MB_WRITE_SINGLE_REG: len = 0; break; case MB_WRITE_MULTIPLE_COILS: len = (len % 8 == 0) ? (len / 8) : (len / 8 + 1); res = new byte[arr.Length + 1]; arr.CopyTo(res, 0); res[arr.Length] = (byte)(len); arr = res; break; case MB_WRITE_MULTIPLE_REGS: len *= 2; res = new byte[arr.Length + 1]; arr.CopyTo(res, 0); res[arr.Length] = (byte)len; //把字节写入数据最后位置 arr = res; break; } return arr; } private static byte[] SendTrainHead(int node, int addr, int len, int stat) { byte[] head = new byte[6]; head[0] = Convert.ToByte(node); head[1] = (byte)(stat&0xFF); head[2] = (byte)(addr >> 8); head[3] = (byte)(addr & 0xFF); head[4] = (byte)(len >> 8); head[5] = (byte)(len & 0xFF); return head; } private void comm_DataReceived(object sender, SerialDataReceivedEventArgs e) { //comm.PortName = "COM1"; try { if (comm.IsOpen) { //comm.Open(); byte [] res = new byte[200]; int buffLen = comm.BytesToRead; byte[] rBuff; comm.Read(res, 0, buffLen); string printStr ="值 ："; if (res[1] == 3) { if (Crc16(res, res.Length) == 0) { rBuff = new byte[buffLen]; Array.Copy(res, rBuff, buffLen); int lenght = int.Parse(rBuff[2].ToString())*2; for (int i = 0; i < lenght; i++) { //string hexStr = rBuff[3 + i].ToString() + Convert.ToString(rBuff[3 + ++i], 16); double temp = ByteConvertDouble(rBuff[3 + i], rBuff[3 + ++i]);// Convert.ToInt32(hexStr, 16) * 0.1d; if (temp < 10) { //temp = 1; } printStr += temp + " : "; } Dispatcher.Invoke(new Action(()=>{ txtbValue.Text = printStr; //MessageBox.Show("数据接收成功！" + printStr, "系统提示"); })); } } //string str = comm.ReadLine(); //byte[] data = http://www.mamicode.com/Convert.FromBase64String(str);>//comm.Close(); } } catch (Exception ex) { } } /// <summary> /// 数值转换 /// </summary> /// <param name="h">16进制 高位</param> /// <param name="l">10进制 低位</param> /// <returns></returns> private double ByteConvertDouble(byte h, byte l) { string hexStr = h.ToString() + Convert.ToString(l, 16); double temp = Convert.ToInt32(hexStr, 16) * 0.1d; return temp; } private void Window_Loaded(object sender, RoutedEventArgs e) { //设置接收事件 comm.DataReceived -= new SerialDataReceivedEventHandler(comm_DataReceived); comm.DataReceived += new SerialDataReceivedEventHandler(comm_DataReceived); comm.PortName = PortName; //comm.DataBits = 1; comm.BaudRate = BaudRate; comm.NewLine = System.Environment.NewLine; comm.RtsEnable = false; comm.ReadTimeout = 5000; comm.WriteTimeout = 2000; timer.Interval = 1000; timer.Elapsed += new ElapsedEventHandler(timer_Elapsed); timer.AutoReset = true; timer.Enabled = true; } private void btnStop_Click(object sender, RoutedEventArgs e) { timer.Stop(); } }
第一次串口编程
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