Arduino到C#数据接收

时间:2013-12-16 01:48:38

标签: c# arduino

我今天早些时候问过这个问题,但是我已经改进了我的代码,所以我在这里提出了一个新问题。

这是我目前的代码:

Arduino代码:

void setup()
{
 pinMode(13,OUTPUT);
 digitalWrite(13,LOW);

 Serial.begin(9600);
}

void loop()
{
 if(Serial.available() > 0)
 {
  char letter = Serial.read();

  if (letter == 'A')
  {
   digitalWrite(13,HIGH);
   Serial.println("THE LED IS ON");
  }
  else if (letter == 'B')
  {
   digitalWriter(13,LOW);
   Serial.println("THE LED IS OFF");
  }
 }
}

我有一个带有onButton,offButton和textboxInterface的C#程序。这是我在C#中的代码。

C#代码:

using System.IO.Ports;

public partial class Form1: Form
{
 public static System.IO.Ports.SerialPort serialPort1;
 private delegate void LineReceivedEvent(string line);

 public Form1()
 {
    InitizlizeComponent();
    System.ComponentModel.IContainer components = new System.ComponentModel.Container();
    serialPort1 = new System.IO.Ports.SerialPort(components);
    serialPort1.PortName = "COM7";
    serialPort1.BaudRate = 9600;
    serialPort1.DtrEnable = true;
    serialPort1.Open();
    serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);
 }

 private static void serialPort1_DataReceived(object sender, SerialDataEventReceivedEventArgs e)
 {
    SerialPort sp = (SerialPort)sender;
    string indata = sp.ReadExisting();
    textboxInterface.Text = indata;
 }

我认为这大多是正确的(?),我得到的唯一错误是作为最后一个 textboxInterface ,出现错误说:*非静态字段需要对象引用,方法或属性'Arduino_Interface.Form1.textboxInterface'*

有人可以告诉我我正在做什么蠢事......

1 个答案:

答案 0 :(得分:0)

首先,从static的声明中删除serialPort1_DataReceived。您需要访问表单的实例字段,因此它不能是static

其次,此事件将在后台线程上引发,您无法从该线程更新UI。您需要封送对UI线程的调用以更新文本框。像这样:

private void serialPort1_DataReceived(object sender, SerialDataEventReceivedEventArgs e)
{
    SerialPort sp = (SerialPort)sender;
    string indata = sp.ReadExisting();
    this.BeginInvoke(new Action(() => textboxInterface.Text = indata));
}