转载:https://blog.csdn.net/weixin_30466421/article/details/99278174
串口操作需要注意的几点如下:
1、如果是USB转串口;则需要安装USB转串口驱动,附件有此驱动。
2、串口打开状态最好不要直接插拔串口,可能会导致中控板或者串口线烧坏。
3、使用串口调试工具CEIWEI,下一章节会贴上使用教程
简单的串口收发通信,有以下步骤:
1、打开制定的串口、绑定串口接收事件
2、初始化串口指令
3、发送串口指令
-------打开串口代码--------
- /// <summary>
- /// 打开串口
- /// </summary>
- /// <param name="strPortName">串口号</param>
- /// <param name="nRate">波特率</param>
- /// <param name="nDataBit">数据位</param>
- /// <param name="stopBits">停止位</param>
- /// /// <param name="nParity">校验位</param>
- /// <returns></returns>
- public bool OpenSerial(string strPortName, int nRate, int nDataBit, float nStopBits, int nParity)
- {
- //这里就是绑定串口接收回调事件,即发送一条串口命令,发送成功,则会触发此事件进入ReciceSerialData方法,我们就进行判断发送成功还是失败。
- serial.DataReceived += new SerialDataReceivedEventHandler(ReciveSerialData);
- serial.PortName = strPortName;//串口号
- serial.BaudRate = nRate;//波特率
- float f = nStopBits;//停止位
- if (f == 0)
- {
- serial.StopBits = StopBits.None;
- }
- else if (f == 1.5)
- {
- serial.StopBits = StopBits.OnePointFive;
- }
- else if (f == 1)
- {
- serial.StopBits = StopBits.One;
- }
- else
- {
- serial.StopBits = StopBits.Two;
- }
- serial.DataBits = nDataBit;//数据位
- if (nParity == 0) //校验位
- {
- serial.Parity = Parity.None;
- }
- else if (nParity == 1)
- {
- serial.Parity = Parity.Odd;
- }
- else if (nParity == 2)
- {
- serial.Parity = Parity.Even;
- }
- else
- {
- serial.Parity = Parity.None;
- }
- serial.ReadTimeout = 3000;//设置超时读取时间
- serial.WriteTimeout = 500;//超时写入时间
- try
- {
- if (!serial.IsOpen)
- {
- serial.Open();
- }
- }
- catch (Exception ex)
- {
- MessageBox.Show(ex.ToString());
- return false;
- }
- return true;
- }
-------使用实例--------
- //定义串口对象
- private SerialPort serial = new SerialPort();
- //在按钮Click事件里调用打开串口的方法,串口COM号参数以本机具体串口号为准,COM1除外,如果只有COM1则需要安装串口驱动,见附件
- private void btnOpenSerial_Click(object sender, EventArgs e)
- {
- if (!OpenSerial("COM3", 115200, 8, 1, 0))
- {
- //串口打开失败
- MessageBox.Show("串口打开失败!");
- }
- }
-------初始化串口命令、发送指令-------
注:我这个命令并不是通用的,是根据我这边的中控板协议;发对应的命令,但是其他中控板的命令格式也是差不多的
- /// <summary>
- /// 初始化串口命令
- /// </summary>
- /// <param name="nStaus">操作类型</param>
- public void InitialSerialCommand(int nStaus)
- {
- byte[] btyData = new byte[100];
- btyData[0] = 0x5A;
- btyData[1] = 0x55;
- btyData[2] = 0x00;
- btyData[3] = 0x00;
- btyData[4] = 0x02;
- btyData[5] = 0xD1;
- btyData[6] = 0x00;
- btyData[7] = 0x18;
- btyData[8] = 0x6A;
- btyData[9] = 0x69;
- //开灯
- if (nStaus == 0)
- {
- btyData[6] = 0x01;
- }
- //全关
- else
- {
- btyData[6] = 0x00;
- }
- //发送指令
- if (serial != null)
- {
- try
- {
- SerialWrite(0, btyData);
- }
- catch (Exception ex)
- {
- MessageBox.Show(ex.ToString());
- }
- }
- }
---------串口回调方法-----------
- /// <summary>
- /// 接收数据事件
- /// </summary>
- /// <param name="sender"></param>
- /// <param name="e"></param>
- private void ReciveSerialData(object sender, SerialDataReceivedEventArgs e)
- {
- try
- {
- if (serial.BytesToRead == 0)
- {
- return;
- }
- byte[] btyReciveData = new byte[serial.BytesToRead];
- byte[] btyResoureData = new byte[btyReciveData.Length];
- string strData = string.Empty;
- int intSp = serial.Read(btyReciveData, 0, btyReciveData.Length);//在此就可以读取到当前缓冲区内的数据
- int i = 0;
- string[] hex = new string[] { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
- for (i = 0; i < btyReciveData.Length; i++)
- {
- btyResoureData[i] = Convert.ToByte(("0x" + (hex[btyReciveData[i] / 16]).ToString() + (hex[btyReciveData[i] % 16]).ToString()), 16);
- }
- for (int a = 0; a < btyReciveData.Length; a++)
- {
- strData += btyResoureData[a].ToString("X2");
- }
- //若串口命令发送成功,则会返回和发送指令一样的指令,我发送的指令是(5A55000002D101186A69 );返回的也是(5A55000002D101186A69 );则可以判定串口数据交互成功。
- if (strData.IndexOf("5A55000002D101186A69") >= 0)
- {
- //发送成功
- }
- }
- catch (Exception ex)
- {
- MessageBox.Show(ex.ToString());
- }
- }
DEMO实例:https://files.cnblogs.com/files/henryzong/%E4%B8%B2%E5%8F%A3%E9%80%9A%E4%BF%A1DEMO.zip
串口驱动:https://files.cnblogs.com/files/henryzong/%E4%B8%B2%E5%8F%A3%E9%A9%B1%E5%8A%A8.zip
串口调试工具:https://files.cnblogs.com/files/henryzong/%E4%B8%B2%E5%8F%A3%E8%B0%83%E8%AF%95%E5%B7%A5%E5%85%B7.zip
转载于:https://www.cnblogs.com/henryzong/p/7429681.html
标签:Parity,btyReciveData,c#,btyData,串口,StopBits,wpf,serial From: https://www.cnblogs.com/cxxtreasure/p/17609690.html