【Arduino】使用C#实现Arduino与电脑进行串行通讯

private SerialPort port =null;
/// <summary>
/// 初始化串口实例
/// </summary>
privatevoid InitialSerialPort()
{
    try
    {
        string portName =this.cmbSerials.SelectedItem.ToString();
        port =new SerialPort(portName, 9600);
        port.Encoding = Encoding.ASCII;
        port.DataReceived += port_DataReceived;
        port.Open();
        this.ChangeArduinoSendStatus(true);
    }
    catch (Exception ex)
    {
        MessageBox.Show("初始化串口发生错误："+ ex.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
}
 
/// <summary>
/// 关闭并销毁串口实例
/// </summary>
privatevoid DisposeSerialPort()
{
    if (port !=null)
    {
        try
        {
            this.ChangeArduinoSendStatus(false);
            if (port.IsOpen)
            {
                port.Close();
            }
            port.Dispose();
        }
        catch (Exception ex)
        {
            MessageBox.Show("关闭串口发生错误："+ ex.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
    }
}
 
/// <summary>
/// 改变Arduino串口的发送状态
/// </summary>
/// <param name="allowSend">是否允许发送数据</param>
privatevoid ChangeArduinoSendStatus(bool allowSend)
{
    if (port !=null&& port.IsOpen)
    {
        if (allowSend)
        {
            port.WriteLine("serial start");
        }
        else
        {
            port.WriteLine("serial stop");
        }
    }
}
 
/// <summary>
/// 从串口读取数据并转换为字符串形式
/// </summary>
/// <returns></returns>
privatestring ReadSerialData()
{
    string value ="";
    try
    {
        if (port !=null&& port.BytesToRead >0)
        {
            value = port.ReadExisting();
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show("读取串口数据发生错误："+ ex.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
 
    return value;
}
 
/// <summary>
/// 在读取到数据时刷新文本框的信息
/// </summary>
privatevoid RefreshInfoTextBox()
{
    string value =this.ReadSerialData();
    Action<string> setValueAction = text =>this.txtInfo.Text += text;
 
    if (this.txtInfo.InvokeRequired)
    {
        this.txtInfo.Invoke(setValueAction, value);
    }
    else
    {
        setValueAction(value);
    }
}

int pinLed =13;//定义连接LED的数字口，当允许通过串口发送数据时，点亮LED，否则关闭LED
boolean sendFlag =false;//指示是否允许通过串口发送数据

boolean readCompleted =false;//指示是否完成读取串口数据
String serialString ="";//串口数据缓存字符串

 

//Author：Alex Leo, Email:conexpress@qq.com, Blog:http://conexpress.cnblogs.com/
//参考:http://arduino.cc/en/Reference/Serial
void setup()
{
  pinMode(pinLed,OUTPUT);
  Serial.begin(9600);
  serialString.reserve(200);//初始化字符串
}
 
void loop()
{
  int lightValue = analogRead(A0);//从A0口读取光线传感器的值
  if(readCompleted)//判断串口是否接收到数据并完成读取
  {
    Serial.print("read value:");
    Serial.println(serialString);//将读取到的信息发送给电脑
    if(serialString =="serial start")//当读取到的信息是"serial start"时，设置发送标志设置为true
    {
      sendFlag =true;
    }
    elseif(serialString =="serial stop")//当读取到的信息是"serial stop"时，设置发送标志设置为false
    {
      sendFlag =false;
    }
    serialString ="";

    readCompleted =false;
  }
 
  if(sendFlag)//如果允许通过串口发送数据，则点亮LED并发送数据，否则关闭LED

  {
    digitalWrite(pinLed, HIGH);
    Serial.print("light value:");
    Serial.println(lightValue);
  }
  else
  {
    digitalWrite(pinLed, LOW);
  }
  delay(1000);//延时1000ms
}
 
void serialEvent()//串口事件处理方法，参考:http://arduino.cc/en/Tutorial/SerialEvent
{
  while(Serial.available())//参考://arduino.cc/en/Serial/Available
  {
    char inChar = (char)Serial.read();
    if(inChar !=' ')//以换行符作为读取结束标志
    {
      serialString += inChar;
    }
    else
    {
      readCompleted =true;
    }
  }
}