C#中串口通信方面的问题

Question

最近在做串口通信方面的程序,请问高手们怎样将从串口接收到的信息按二进制的形原样输出?
怎样将接收到的信息按照一定的规约解释出来?

Answer 1

在C#里面有一个SerialPort类，专门用于串口操作，读取数据有一个事件DataReceived 
比如：this._serialPort.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
            this._serialPort.ReceivedBytesThreshold = 1;
             #region 接收串口数据
        private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            try
            {
                string strReceiveData = string.Empty;
                byte[] buffer = Convert.FromBase64String(_serialPort.ReadLine());
                strReceiveData  = Encoding.Unicode.GetString(buffer); 
//.......                
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                return;
            }
        }
        #endregion      

Answer 2

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Text; 
using System.Windows.Forms; 
using System.IO.Ports; 
using System.Threading; 
using System.IO; 
namespace SerialPorts 
{ 
     
    public partial class Form1 : Form 
    { 
        int year;//年 
        int month;//月 
        int day;//日 
        int hour;//小时 
        int minute;//分 
        int second;//秒 
        uint u_data;//用水量 
        int modify;//效验码 
        string message; 
        public Form1() 
        { 
            InitializeComponent();       
        } 
        private void btnSend_Click(object sender, EventArgs e) 
        { 
            timer1.Enabled = true; 
            year =Convert.ToInt32(DateTime.Now.Year.ToString().Substring(2)); 
            month = DateTime.Now.Month; 
            day = DateTime.Now.Day; 
            hour = DateTime.Now.Hour; 
            minute = DateTime.Now.Minute; 
            second = DateTime.Now.Second; 
            u_data = 1234; 
            modify = year + month + day + hour + minute + second + Convert.ToInt32(u_data.ToString().Substring(0, 2)) + Convert.ToInt32(u_data.ToString().Substring(2)); 
             
            sendData(); 
            btnSend.Enabled = false; 
            btnReceive.Enabled = true; 
            MessageBox.Show("开始发送数据!"); 
        } 
        /// <summary> 
        /// 发送数据 
        /// <para>message --string 显示在界面的数据</para> 
        /// <para>data --byte[] 发送到缓存的数据</para> 
        /// </summary> 
        private void sendData() 
        { 
            message = ""; 
            byte[] data = { 0xAA, 0xAA, 0xAA, byte.Parse(year.ToString()), byte.Parse(month.ToString()), byte.Parse(day.ToString()), byte.Parse(hour.ToString()), byte.Parse(minute.ToString()), byte.Parse(second.ToString()), byte.Parse(u_data.ToString().Substring(0, 2)), byte.Parse(u_data.ToString().Substring(2)), byte.Parse(modify.ToString()) }; 
            foreach (byte s in data) 
            { 
                message += s.ToString() + ","; 
            } 
            _serialPort.Write(data, 0, 12); 
             
            lsbSendMessage.Items.Add(message.Substring(0, message.Length - 1));           
        } 
        private void btnReceive_Click(object sender, EventArgs e) 
        { 
            btnReceive.Enabled = false; 
            timer1.Enabled = false; 
            btnSend.Enabled = false; 
            chbCom1.Checked = false; 
            chbCom2.Checked = false; 
            MessageBox.Show(_serialPort.PortName + "口已断开!"); 
        } 
        private void timer1_Tick(object sender, EventArgs e) 
        { 
            timer1.Interval = 1000; 
            //btnSend_Click(sender, e); 
            sendData(); 
        } 
        private void Form1_Load(object sender, EventArgs e) 
        { 
            timer1.Enabled = false; 
            btnSend.Enabled = false; 
            btnReceive.Enabled = false; 
        } 
        private void _serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e) 
        { 
            byte[] receive= new byte[1024]; 
            _serialPort.Read(receive, 0, 3); 
            byte[] data ={ 0x55, 0x55, 0x55 };//硬件返回值 
           
            if (data[0] == receive[0])//应该比较3个，此处偷懒 
            { 
                timer1.Enabled = false; 
                btnSend.Enabled = false; 
                message=receive[0]+","+receive[1]+","+receive[2]; 
                 
                _serialPort.Close(); 
                MessageBox.Show("数据已确认！"); 
                 
            } 
        } 
        /// <summary> 
        /// 打开串口 
        /// </summary> 
        /// <param name="com">串口名</param> 
        private void openCom(string com) 
        { 
            _serialPort.PortName = com;// SetPortName(_serialPort.PortName); 
            _serialPort.BaudRate = 9600;//SetPortBaudRate(_serialPort.BaudRate); 
            _serialPort.WriteBufferSize = 12; 
            _serialPort.ReadTimeout = 500; 
            _serialPort.WriteTimeout = 500; 
            _serialPort.Open(); 
            //还可以增加很多设置选项 
        } 
        private void chbCom1_CheckedChanged(object sender, EventArgs e) 
        { 
            timer1.Enabled = false; 
            btnReceive.Enabled = false; 
            if (chbCom1.Checked) 
            { 
                if (chbCom2.Checked) 
                { 
                     
                    chbCom2.Checked = false; 
                    _serialPort.Close(); 
                } 
                btnSend.Enabled = true; 
                _serialPort.PortName = "com1"; 
                openCom(_serialPort.PortName); 
                MessageBox.Show("com1口连接成功！"); 
            } 
            else 
            { 
                btnSend.Enabled = false; 
                _serialPort.Close(); 
                MessageBox.Show("com1口被断开！"); 
            } 
        } 
        private void chbCom2_CheckedChanged(object sender, EventArgs e) 
        { 
            timer1.Enabled = false; 
            btnReceive.Enabled = false; 
            if (chbCom2.Checked) 
            { 
                if (chbCom1.Checked) 
                { 
                    chbCom1.Checked = false; 
                    _serialPort.Close(); 
                } 
                 
                btnSend.Enabled = true; 
                _serialPort.PortName = "com2"; 
                openCom(_serialPort.PortName); 
                MessageBox.Show("com2口连接成功！"); 
            } 
            else 
            { 
                btnSend.Enabled = false; 
                _serialPort.Close(); 
                MessageBox.Show("com2口被断开！"); 
            } 
        } 
    }       
}