如何从串行端口获取数据
本文关键字:获取 数据 串行端口 | 更新日期: 2023-09-27 18:20:23
我有这段代码,但我不知道如何获取数据并将其放入一个变量中:
protected override void OnStart(string[] args)
{
/* This WaitHandle will allow us to shutdown the thread when
the OnStop method is called. */
_shutdownEvent = new ManualResetEvent(false);
/* Create the thread. Note that it will do its work in the
appropriately named DoWork method below. */
_thread = new Thread(DoWork);
/* Start the thread. */
_thread.Start();
}
然后在DoWork中,我有以下内容:
private void DoWork()
{
//opening serial port
SerialPort objSerialPort;
objSerialPort = new SerialPort();
objSerialPort.PortName = "COM2";
objSerialPort.BaudRate = 11500;
objSerialPort.Parity = Parity.None;
objSerialPort.DataBits = 16;
objSerialPort.StopBits = StopBits.One;
objSerialPort.Open();
所以,我打开了端口,但从哪里开始获取数据???如何初始化变量?所接收的消息的形式为52 45 41 44 45 52 30 31,其中41 44 45 53 30是十六进制的消息,而52 45是报头和31 CRC。
请让我知道怎么做。
谢谢。。。。
使用串行端口就像使用文件或套接字一样:
while ((bytesRead = objSerialPort.Read(buffer, 0, buffer.Length)) > 0)
{
var checksum = buffer[bytesRead - 1];
if (VerifyChecksum(checksum, buffer, bytesRead)) // Check the checksum
{
DoSomethinWithData(buffer, bytesRead); // Do something with this bytes
}
}
byte[] buffer = new byte[1];
String message = "";
While (true)
{
if(objSerialPort.Read(buffer,0,1)>0)
{
message+= System.Text.Encoding.UTF8.GetChars(buffer).ToString();
//Or you could call another function here that will DoSomething with each byte coming in!
}
}
应该这么做!