C#SerialPort实现串口控制继电器

最近做了一个小系统，麻雀虽小五脏俱全呀，用到各种线程控制，串口控制等技术。其中串口控制最麻烦，因为继电器的响应很快，根据不同的转接口，返回的数据质量是不一样的，所以不能直接wirte，然后马上read，这样经常得到的效应状态是错误的。因此需要用到backgroundworker不停地read，校验数据成功后再设置成功状态标志，最后让timer定时获取改标志，成功后立即控制程序界面上的按钮等控件。

public void openSerial()
{
try
{
foreach (GlobaConfig config in GlobaConfigInstance.Instance)
{
if ((!config.SerialPort.IsOpen))
{
config.SerialPort.Open();
config.SerialPort.DiscardInBuffer();
config.SerialPort.DiscardOutBuffer();
}
}
}
catch(Exception ex)
{
//MessageBox.Show("打开失败！" + ex.Message);
NotificationManager.Show(this, "打开失败！" + ex.Message,
Color.Gold, 1000);
return;
}
}

private void SendOpenDemand(byte port)
{
byte[] buffer = new byte[20];
byte[] buffer2 = new byte[2];
buffer[0] = GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr;
buffer[1] = 5;
buffer[2] = 0;
buffer[3] = port;
buffer[4] = 0xff;
buffer[5] = 0;
A101.GetCRC(buffer, 6, buffer2);
buffer[6] = buffer2[0];
buffer[7] = buffer2[1];
if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)
{
this.SerialSendFrame(buffer, 0, 8);
}
else
{
//MessageBox.Show("亲，你要先打开串口哦！");
}
}

private void SendCloseDemand(byte port)
{
byte[] buffer = new byte[20];
byte[] buffer2 = new byte[2];
buffer[0] = GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr;
buffer[1] = 5;
buffer[2] = 0;
buffer[3] = port;
buffer[4] = 0;
buffer[5] = 0;
A101.GetCRC(buffer, 6, buffer2);
buffer[6] = buffer2[0];
buffer[7] = buffer2[1];
if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)
{
this.SerialSendFrame(buffer, 0, 8);
}
else
{
//MessageBox.Show("亲，你要先打开串口哦！");
}
}

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
byte[] buffer;
while (true)
{
try
{

if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)
{
int bytesToRead = GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.BytesToRead;
buffer = new byte[0xff];
if (bytesToRead > 0)
{
int num2;
bytesToRead = 0x45;
GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.Read(buffer, 0, bytesToRead);
bool isValid = A101.ValidCRC(buffer, (byte)bytesToRead);
System.Diagnostics.Debug.WriteLine("isValid: " + isValid);
if (isValid)
{
for (num2 = 0; num2 < bytesToRead; num2++)
{
this.SerialRecBuf[num2] = buffer[num2];
}

this.SerialRecFlag = true;
}
else
this.SerialRecFlag = false;

}
}
}
catch (Exception ex)
{

Console.WriteLine(ex);
}
Thread.Sleep(1);
}
}

private void timer1_Tick(object sender, EventArgs e)
{
if (this.SerialRecFlag)
{
this.SerialRecFlag = false;
if (((this.SerialRecBuf[0] == GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr) && (this.SerialRecBuf[1] == 5)) && (this.SerialRecBuf[4] == 0))
{
this.BtnSendFlag = false;
if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)
{
Control[] controls = this.kryptonNavigator1.SelectedPage.Controls.Find("btnRelay" + kryptonNavigator1.SelectedIndex + this.SerialRecBuf[3], true);
if (controls.Length > 0)
{
KryptonCheckButton button = controls[0] as KryptonCheckButton;
button.Checked = false;
button.Tag = "断开";
button.Enabled = true;
}
}
}
else if (((this.SerialRecBuf[0] == GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr) && (this.SerialRecBuf[1] == 5)) && (this.SerialRecBuf[4] == 0xff))
{
this.BtnSendFlag = false;

if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)
{
Control[] controls = this.kryptonNavigator1.SelectedPage.Controls.Find("btnRelay" + kryptonNavigator1.SelectedIndex + this.SerialRecBuf[3], true);
if (controls.Length > 0)
{
KryptonCheckButton button = controls[0] as KryptonCheckButton;
button.Checked = true;
button.Tag = "闭合";
button.Enabled = true;
}
}
}
else if (((this.SerialRecBuf[0] == GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr) && (this.SerialRecBuf[1] == 1)) && (this.SerialRecBuf[2] == 4))
{
uint[] numArray = new uint[4];
uint resource = 0;
numArray[0] = this.SerialRecBuf[3];
numArray[1] = this.SerialRecBuf[4];
numArray[2] = this.SerialRecBuf[5];
numArray[3] = this.SerialRecBuf[6];
resource = (((numArray[3] << 0x18) | (numArray[2] << 0x10)) | (numArray[1] << 8)) | numArray[0];

if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)
{
foreach (Control control in this.kryptonNavigator1.SelectedPage.Controls[2].Controls)
{
KryptonCheckButton button = control as KryptonCheckButton;
if (this.GetRegBit(resource, (byte)control.TabIndex) == 0)
{
button.Checked = false;
button.Tag = "断开";
}
else
{
button.Checked = true;
button.Tag = "闭合";
}
button.Enabled = true;
}
}
}

}
}

private void timer2_Tick(object sender, EventArgs e)
{
if (!this.BtnSendFlag)
{
byte[] buffer = new byte[20];
byte[] buffer2 = new byte[2];
buffer[0] = GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr;
buffer[1] = 1;
buffer[2] = 0;
buffer[3] = 0;
buffer[4] = 0;
buffer[5] = 0x1c;
A101.GetCRC(buffer, 6, buffer2);
buffer[6] = buffer2[0];
buffer[7] = buffer2[1];
System.Diagnostics.Debug.WriteLine(kryptonNavigator1.SelectedIndex + ":" + GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen);
if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)
{
this.SerialSendFrame(buffer, 0, 8);
this.timer1.Start();
}
else
{
if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].IsValid == true)
{
GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].IsValid = false;
try
{
GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.Open();
//修復退出的線程
//this.timer1 = new System.Windows.Forms.Timer();
this.timer1.Start();
}
catch (Exception ex)
{
NotificationManager.Show(this, "主机" + (kryptonNavigator1.SelectedIndex + 1) + "出现异常：" + ex.Message,
Color.Gold, 1000);
//MessageBox.Show("主机" + (kryptonNavigator1.SelectedIndex + 1) + "出现异常：" + ex.Message);
}
}
}
}
}