/// <summary>
/// Turns port 1 on or off.
/// </summary>
/// <param name="status">True for on, False for off.</param>
/// <exception cref="FailureDetectorException"></exception>
public void SetRelay1Status(bool status)
{
sem.WaitOne();
if (status)
{
try
{
sp.Write("relay on 1" + CARRIAGE_RETURN);
}
catch (Exception inner)
{
string errMsg = "USBRelayController.SetRelay1Status : Unable to write command to relay board.";
RelayControllerException ex = new RelayControllerException(errMsg, inner);
log.Error(errMsg, ex);
sem.Release();
throw ex;
}
}
else
{
try
{
sp.Write("relay off 1" + CARRIAGE_RETURN);
}
catch (Exception inner)
{
string errMsg = "USBRelayController.SetRelay1Status : Unable to write command to relay board.";
RelayControllerException ex = new RelayControllerException(errMsg, inner);
log.Error(errMsg, ex);
sem.Release();
throw ex;
}
}
sem.Release();
}
public void Close()
{
sem.WaitOne();
try
{
sp.Close();
}
catch (Exception inner)
{
string errMsg = "USBRelayController.Close : Unable to close serial port.";
RelayControllerException ex = new RelayControllerException(errMsg, inner);
log.Error(errMsg, ex);
sem.Release();
throw ex;
}
sem.Release();
}
/// <summary>
/// Attempts to open up serial port connection to com port specified by portNum.
/// </summary>
/// <param name="portNum">Com port to connect to.</param>
/// <exception cref="RelayControllerException"></exception>
public void Open(int portNum)
{
sem.WaitOne();
sp.PortName = "COM" + portNum.ToString();
sp.BaudRate = 9600;
sp.DataBits = 8;
try
{
sp.Open();
}
catch (Exception inner)
{
string errMsg = "USBRelayController.USBRelayController : Unable to open serial port.";
RelayControllerException ex = new RelayControllerException(errMsg, inner);
log.Error(errMsg, ex);
sem.Release();
throw ex;
}
isOpen = true;
sem.Release();
}
/// <summary>
/// Reads relay status of port 1
/// </summary>
/// <exception cref="RelayControllerException"></exception>
/// <returns>True if on, False if off.</returns>
public bool ReadRelay1Status()
{
sem.WaitOne();
try
{
sp.DiscardInBuffer();
}
catch (Exception inner)
{
string errMsg = "USBRelayController.ReadRelay1Status : Unable to discard input buffer.";
RelayControllerException ex = new RelayControllerException(errMsg, inner);
log.Error(errMsg, ex);
sem.Release();
throw ex;
}
try
{
sp.Write("relay read 1" + CARRIAGE_RETURN);
}
catch (Exception inner)
{
string errMsg = "USBRelayController.ReadRelay1Status : Unable to write command.";
RelayControllerException ex = new RelayControllerException(errMsg, inner);
log.Error(errMsg, ex);
sem.Release();
throw ex;
}
// sleep a bit to wait for response
Thread.Sleep(15);
String message;
try
{
message = sp.ReadExisting();
}
catch (Exception inner)
{
string errMsg = "USBRelayController.ReadRelay1Status : Unable to read response from controller.";
RelayControllerException ex = new RelayControllerException(errMsg, inner);
log.Error(errMsg, ex);
sem.Release();
throw ex;
}
bool status;
try
{
status = message.Contains("on");
}
catch (Exception inner)
{
string errMsg = "USBRelayController.ReadRelay1Status : Received null response from controller.";
RelayControllerException ex = new RelayControllerException(errMsg, inner);
log.Error(errMsg, ex);
sem.Release();
throw ex;
}
sem.Release();
return(status);
}