private void btnOpenCom_Click(object sender, EventArgs e)
{
if (btnOpenCom.Text == "打开连接")
{
if (modbus.Open(cmbPort.Text, int.Parse(cmbBaudRate.Text), int.Parse(cmbDataBits.Text),
(Parity)cmbParity.SelectedIndex, (StopBits)int.Parse(cmbStopBit.Text), -1, -1))
{
lblState.Text = modbus.PortName + "端口已经打开";
gBoxCOM.Enabled = false;
btnOpenCom.Text = "断开连接";
btnOpenCom.BackColor = Color.Plum;
timer1.Start();
btnOffTimer.Text = "停止刷新";
}
}
else
{
timer1.Stop();
btnOffTimer.Text = "自动刷新";
CommonTools.Delay(1000);
if (modbus.Close())
{
lblState.Text = "连接未打开";
gBoxCOM.Enabled = true;
btnOpenCom.Text = "打开连接";
btnOpenCom.BackColor = Color.Lime;
}
}
}
void SPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
CommonTools.Delay(500);
if (!IsOpen)
{
return;
}
if (SPort.BytesToRead > 0)
{
byte[] dataBytes = new byte[SPort.BytesToRead];
SPort.Read(dataBytes, 0, SPort.BytesToRead);
//SPort.DiscardInBuffer();
//SPort.DiscardOutBuffer();
// string strDebug = CommonTools.ToHexString(dataBytes); //调试用
if (CheckResponse(dataBytes, dataBytes.Length))
{
ReceivedData(CommonTools.ToHexString(dataBytes));
}
else
{
ReceivedData("CRC_Error");
}
}
}