一、c#实现串口通信程序的开发
C#串口介绍以及简单串口通信程序设计实现
简单的串口通信工具,基于C#应用程序WinFrom实现
串口介绍
串行接口简称串口,也称串行通信接口或串行通讯接口(通常指COM接口),是采用串行通信方式的扩展接口。(至于再详细,自己百度)
串口应用:
工业领域使用较多,比如:数据采集,设备控制等等,好多都是用串口通信来实现!你要是细心的话,你会发现,目前家用国网智能电能表就具备RS485通信总线(串行总线的一种)与RS232可以相互转化(当然一般,非专业的谁也不会闲的蛋疼,趴电表上瞎看,最多也就看看走了多少度电)
RS232 DB9介绍:
1.示意图
2.针脚介绍:
- 载波检测(DCD)
- 接受数据(RXD)
- 发出数据(TXD)
- 数据终端准备好(DTR)
- 信号地线(SG)
- 数据准备好(DSR)
- 请求发送(RTS)
- 清除发送(CTS)
- 振铃指示(RI)
3.实物图:
以下是一个usb转串口线:这个头就是一个公头,另一端是一个usb口
笨小孩串口工具运行图:
1.开启程序
2.发送一行字符串HelloBenXH,直接将针脚的发送和接收链接起来就可以测试了(针脚2 接受数据(RXD) 和3 发出数据(TXD))直接链接,
C#代码实现:采用SerialPort
1.实例化一个SerialPort
private SerialPort ComDevice = new SerialPort();
2.初始化参数绑定接收数据事件
public void init()
{
btnSend.Enabled = false;
cbbComList.Items.AddRange(SerialPort.GetPortNames());
if (cbbComList.Items.Count > 0)
{
cbbComList.SelectedIndex = 0;
}
cbbBaudRate.SelectedIndex = 5;
cbbDataBits.SelectedIndex = 0;
cbbParity.SelectedIndex = 0;
cbbStopBits.SelectedIndex = 0;
pictureBox1.BackgroundImage = Properties.Resources.red;
ComDevice.DataReceived += new SerialDataReceivedEventHandler(Com_DataReceived);
}
3.打开串口button事件
private void btnOpen_Click(object sender, EventArgs e)
{
if (cbbComList.Items.Count <= 0)
{
MessageBox.Show("没有发现串口,请检查线路!");
return;
}
if (ComDevice.IsOpen == false)
{
ComDevice.PortName = cbbComList.SelectedItem.ToString();
ComDevice.BaudRate = Convert.ToInt32(cbbBaudRate.SelectedItem.ToString());
ComDevice.Parity = (Parity)Convert.ToInt32(cbbParity.SelectedIndex.ToString());
ComDevice.DataBits = Convert.ToInt32(cbbDataBits.SelectedItem.ToString());
ComDevice.StopBits = (StopBits)Convert.ToInt32(cbbStopBits.SelectedItem.ToString());
try
{
ComDevice.Open();
btnSend.Enabled = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
btnOpen.Text = "关闭串口";
pictureBox1.BackgroundImage = Properties.Resources.green;
}
else
{
try
{
ComDevice.Close();
btnSend.Enabled = false;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
btnOpen.Text = "打开串口";
pictureBox1.BackgroundImage = Properties.Resources.red;
}
cbbComList.Enabled = !ComDevice.IsOpen;
cbbBaudRate.Enabled = !ComDevice.IsOpen;
cbbParity.Enabled = !ComDevice.IsOpen;
cbbDataBits.Enabled = !ComDevice.IsOpen;
cbbStopBits.Enabled = !ComDevice.IsOpen;
}
4.发送数据
public bool SendData(byte[] data)
{
if (ComDevice.IsOpen)
{
try
{
ComDevice.Write(data, 0, data.Length);
return true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else
{
MessageBox.Show("串口未打开", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
return false;
}
private void btnSend_Click(object sender, EventArgs e)
{
byte[] sendData = null;
if (rbtnSendHex.Checked)
{
sendData = strToHexByte(txtSendData.Text.Trim());
}
else if (rbtnSendASCII.Checked)
{
sendData = Encoding.ASCII.GetBytes(txtSendData.Text.Trim());
}
else if (rbtnSendUTF8.Checked)
{
sendData = Encoding.UTF8.GetBytes(txtSendData.Text.Trim());
}
else if (rbtnSendUnicode.Checked)
{
sendData = Encoding.Unicode.GetBytes(txtSendData.Text.Trim());
}
else
{
sendData = Encoding.ASCII.GetBytes(txtSendData.Text.Trim());
}
if (this.SendData(sendData))
{
lblSendCount.Invoke(new MethodInvoker(delegate
{
lblSendCount.Text = (int.Parse(lblSendCount.Text) + txtSendData.Text.Length).ToString();
}));
}
else
{
}
}
private byte[] strToHexByte(string hexString)
{
hexString = hexString.Replace(" ", "");
if ((hexString.Length % 2) != 0)
hexString += " ";
byte[] returnBytes = new byte[hexString.Length / 2];
for (int i = 0; i < returnBytes.Length; i++)
returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2).Replace(" ", ""), 16);
return returnBytes;
}
5.接收和数据输出
private void Com_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
byte[] ReDatas = new byte[ComDevice.BytesToRead];
ComDevice.Read(ReDatas, 0, ReDatas.Length);
this.AddData(ReDatas);
}
public void AddData(byte[] data)
{
if (rbtnHex.Checked)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < data.Length; i++)
{
sb.AppendFormat("{0:x2}" + " ", data[i]);
}
AddContent(sb.ToString().ToUpper());
}
else if (rbtnASCII.Checked)
{
AddContent(new ASCIIEncoding().GetString(data));
}
else if (rbtnUTF8.Checked)
{
AddContent(new UTF8Encoding().GetString(data));
}
else if (rbtnUnicode.Checked)
{
AddContent(new UnicodeEncoding().GetString(data));
}
else
{ }
lblRevCount.Invoke(new MethodInvoker(delegate
{
lblRevCount.Text = (int.Parse(lblRevCount.Text) + data.Length).ToString();
}));
}
private void AddContent(string content)
{
this.BeginInvoke(new MethodInvoker(delegate
{
if (chkAutoLine.Checked && txtShowData.Text.Length > 0)
{
txtShowData.AppendText("\r\n");
}
txtShowData.AppendText(content);
}));
}
6.清空数据区域事件
private void btnClearRev_Click(object sender, EventArgs e)
{
txtShowData.Clear();
}
private void btnClearSend_Click(object sender, EventArgs e)
{
txtSendData.Clear();
}
运行程序下载地址 BXHSerialPort.exe
源代码工程文件下载
OK 步入正题
二、Unity3d与串口通信程序的开发
先做一个简单的UI,用来控制串口设备的开关
代码就比较简单了
自定义端口API类
using System;
using System.IO.Ports;
public enum PortsType
{
I,i,
A,B,C,D,E,F,G,H,
a,b,c,d,e,f,g,h
}
public class PortsContol
{
SerialPort sp = new SerialPort("COM3", 9600);
public void Send_Click(PortsType data)
{
sp.Open();
switch (data)
{
case PortsType.I:
sp.WriteLine("I");
break;
case PortsType.i:
sp.WriteLine("i");
break;
case PortsType.A:
sp.WriteLine("A");
break;
case PortsType.B:
sp.WriteLine("B");
break;
case PortsType.C:
sp.WriteLine("C");
break;
case PortsType.D:
sp.WriteLine("D");
break;
case PortsType.E:
sp.WriteLine("E");
break;
case PortsType.F:
sp.WriteLine("F");
break;
case PortsType.G:
sp.WriteLine("G");
break;
case PortsType.H:
sp.WriteLine("H");
break;
case PortsType.a:
sp.WriteLine("a");
break;
case PortsType.b:
sp.WriteLine("b");
break;
case PortsType.c:
sp.WriteLine("c");
break;
case PortsType.d:
sp.WriteLine("d");
break;
case PortsType.e:
sp.WriteLine("e");
break;
case PortsType.f:
sp.WriteLine("f");
break;
case PortsType.g:
sp.WriteLine("g");
break;
case PortsType.h:
sp.WriteLine("h");
break;
default:
break;
}
sp.Close();
}
}
Unity调用
using UnityEngine;
using System.Collections;
public class ButtonClick1 : MonoBehaviour
{
PortsContol pc = new PortsContol();
void Start()
{
}
void Update()
{
}
public void Open_Click()
{
pc.Send_Click(PortsType.I);
}
public void Close_Click()
{
pc.Send_Click(PortsType.i);
}
public void OneOpen_Click()
{
pc.Send_Click(PortsType.A);
}
public void OneClose_Click()
{
pc.Send_Click(PortsType.a);
}
}
脚本绑定在主摄像机上,按钮Button调用主摄像机上的函数
OK,这就行了,就可以用Unity3d控制串口程序了