private void __UpdatePolledVariablesSerial()
{
Trace.Enter("_UpdatePolledVariablesSerial");
string macro = "";
//lock (m_SerialPort)
{
try
{
DiscardInBuffer(); //clear all received data
string cmd = CompleteNativeCommand("<81:");
Transmit(cmd);
CommandItem command = new CommandItem("<81:", 2000, true);
macro = GetCommandResult(command);
}
catch
{
return;
}
}
if (macro == null)
{
Trace.Error("timeout", "UpdatePolledVariablesSerial");
return;
}
Trace.Info(4, "Serial Macro 0 result", macro);
_UpdatePolledVariablesFromMacro(macro);
Trace.Exit("_UpdatePolledVariablesSerial");
}
internal override void _UpdatePolledVariables()
{
if (GeminiLevel >= 5)
{
if (!CanPoll)
{
Thread.Sleep(SharedResources.GEMINI_POLLING_INTERVAL / 2);
return; //don't tie up the serial port while pulse guiding -- timing is critical!
}
Trace.Enter("_UpdatePolledVariables5");
try
{
CommandItem command;
int timeout = 3000; // polling should not hold up the queue for too long
DiscardInBuffer(); //clear all received data
Transmit(CompleteNativeCommand("<97:"));
command = new CommandItem("<97:", timeout, true);
string change = GetCommandResult(command);
if (change != null && change.Length == 6)
{
m_CurrentUpdateState = change;
}
}
catch { }
if (m_CurrentUpdateState != m_PreviousUpdateState) ProcessUpdates();
}
base._UpdatePolledVariables();
}
/// <summary>
/// Wait for a proper response from Gemini for a given command. Command has already been sent.
///
/// </summary>
/// <param name="command">actual command sent to Gemini</param>
/// <param name="bResyncOnError">true if driver should resync if an error was detected</param>
/// <returns>result received from Gemini, or null if no result, timeout, or bad result received</returns>
private string GetCommandResult(CommandItem command, bool bResyncOnError, ref bool bReturn)
{
if (m_EthernetPort)
return GetCommandResultEthernet(command, bResyncOnError, ref bReturn);
else
return GetCommandResultSerial(command, bResyncOnError, ref bReturn);
}
/// <summary>
/// Wait for a proper response from Gemini for a given command. Command has already been sent.
///
/// </summary>
/// <param name="command">actual command sent to Gemini</param>
/// <param name="bResyncOnError">true if driver should resync if an error was detected</param>
/// <returns>result received from Gemini, or null if no result, timeout, or bad result received</returns>
private string GetCommandResultSerial(CommandItem command, bool bResyncOnError, ref bool bReturn)
{
string result = null;
if (!m_SerialPort.IsOpen) return null;
Trace.Enter(4, "GetCommandResult", command.m_Command);
GeminiCommand.ResultType gemini_result = GeminiCommand.ResultType.HashChar;
int char_count = 0;
GeminiCommand gmc = FindGeminiCommand(command.m_Command);
if (gmc != null)
{
gemini_result = gmc.Type;
char_count = gmc.Chars;
command.m_UpdateRequired = gmc.UpdateStatus;
}
// no result expected by this command, just return;
if (gemini_result == GeminiCommand.ResultType.NoResult)
{
bReturn = false;
return null;
}
bReturn = true;
m_SerialTimeoutExpired.Reset();
m_SerialErrorOccurred.Reset();
if (command.m_Timeout > 0)
{
tmrReadTimeout.Interval = command.m_Timeout;
tmrReadTimeout.Start();
}
try
{
Trace.Info(0, "Serial wait for response", command.m_Command);
switch (gemini_result)
{
// a specific number of characters expected as the return value
case GeminiCommand.ResultType.NumberofChars:
result = ReadNumber(char_count);
break;
// value '1' or a string terminated by '#'
case GeminiCommand.ResultType.OneOrHash:
result = ReadNumber(1); ; // check if first character is 1, and return if it is, no hash expected
if (result != "1")
{
result += ReadTo('#');
if (command.m_Raw) //Raw should return the full string including #
result += "#";
}
break;
// value '0' or a string terminated by '#'
case GeminiCommand.ResultType.ZeroOrHash:
result = ReadNumber(1);
if (result != "0")
{
result += ReadTo('#');
if (command.m_Raw) //Raw should return the full string including #
result += "#";
}
break;
// string terminated by '#'
case GeminiCommand.ResultType.HashChar:
result = ReadTo('#');
if (command.m_Raw) //Raw should return the full string including #
result += "#";
break;
// '0' or two strings, each terminated with '#' (:SC command)
case GeminiCommand.ResultType.ZeroOrTwoHash:
result = ReadNumber(1);
if (result != "0")
{
result += ReadTo('#');
if (command.m_Raw) result += '#';
result += ReadTo('#');
if (command.m_Raw) result += '#';
}
break;
}
}
catch (Exception ex)
{
if (m_AllowErrorNotify)
{
Trace.Except(ex);
GeminiError.LogSerialError(SharedResources.TELESCOPE_DRIVER_NAME, "Timeout error occurred after " + command.m_Timeout + "msec while processing command '" + command.m_Command + "'");
if (OnError != null && m_Connected) OnError(SharedResources.TELESCOPE_DRIVER_NAME, Resources.SerialTimeout);
}
AddOneMoreError();
if (bResyncOnError) Resync();
return null;
}
finally
{
tmrReadTimeout.Stop();
}
if (m_SerialErrorOccurred.WaitOne(0))
{
Trace.Error("Communications error", command.m_Command);
GeminiError.LogSerialError(SharedResources.TELESCOPE_DRIVER_NAME, "Comm error reported while processing command '" + command.m_Command + "'");
if (OnError != null && m_Connected && m_AllowErrorNotify) OnError(SharedResources.TELESCOPE_DRIVER_NAME, Resources.SerialError);
AddOneMoreError();
return null; // error occurred!
}
if (result != null)
m_LastDataTick = DateTime.Now; // remember when last successfull data was received.
// return value for native commands has a checksum appended: validate it and remove it from the return string:
if (!string.IsNullOrEmpty(result) && (command.m_Command[0] == '<' || command.m_Command[0] == '>') && !command.m_Raw)
{
byte chksum = (byte)result[result.Length - 1];
result = result.Substring(0, result.Length - 1); //remove checksum character
if ((((int)chksum) & m_ChecksumMask) != (ComputeChecksum(result) & m_ChecksumMask)) // bad checksum -- ignore the return value!
{
Trace.Error("Bad Checksum", command.m_Command, result);
GeminiError.LogSerialError(SharedResources.TELESCOPE_DRIVER_NAME, "Serial comm error (bad checksum) while processing command '" + command.m_Command + "'");
if (OnError != null && m_Connected && m_AllowErrorNotify) OnError(SharedResources.TELESCOPE_DRIVER_NAME, Resources.SerialError);
AddOneMoreError();
result = null;
}
}
Trace.Info(0, "Serial received:", command.m_Command, result);
Trace.Exit(4, "GetCommandResult", command.m_Command, result);
return result;
}
private string GetCommandResult(CommandItem command, bool bResyncOnError)
{
bool bReturn = false;
return GetCommandResult(command, bResyncOnError, ref bReturn);
}
