/// <summary>
/// split the messages
/// </summary>
/// <param name="messages"></param>
/// <returns></returns>
private ArrayList getMessages(byte[] messages)
{
ArrayList mesList = new ArrayList();
bool beginMessage = false;
string sMessage = string.Empty;
for (int i = 0; i < messages.Length - 2; i++)
{
if (beginMessage)
{
sMessage = sMessage + CommunicationTools.byteToString(messages[i]);
}
if (messages[i] == _cc_STX)
{
beginMessage = true;
sMessage = string.Empty;
sMessage = sMessage + CommunicationTools.byteToString(messages[i]) + CommunicationTools.byteToString(messages[i + 1]);
i++;
}
if (messages[i] == _cc_ETX && beginMessage)
{
beginMessage = false;
sMessage = sMessage + CommunicationTools.byteToString(messages[i + 1]) + CommunicationTools.byteToString(messages[i + 2]);
mesList.Add(CommunicationTools.stringToByteArray(sMessage));
sMessage = string.Empty;
i += 2;
}
}
return(mesList);
}
/// <summary>
/// decompress a dataarray - 0x00 and 0xff values are compress after crc-calculation
/// -before computing data, the dataarray musst decompress
/// 0x10 in data comes twice it is one
/// </summary>
/// <param name="data">dataarray wich will be decompress</param>
/// <returns>decompress data array</returns>
private byte[] decompressDataStream(byte[] data)
{
if (data.Length > 6)
{
int length = data.Length;
string sDecomp = "";
int posLastDLE = int.MinValue;
//DLE ETX
sDecomp = sDecomp + CommunicationTools.byteToString(data[0]);
sDecomp = sDecomp + CommunicationTools.byteToString(data[1]);
//Header and Data decompress
for (int i = 2; i < length - 4; i++)
{
if (data[i] == 0x10)
{
if ((posLastDLE + 1) == i)
{
i++;
}
else
{
posLastDLE = i;
}
}
if ((data[i] == 0x00 || data[i] == 0xff) && (i + 1 != length))
{
int count = (int)data[i + 1];
for (int j = 0; j < count; j++)
{
sDecomp = sDecomp + CommunicationTools.byteToString(data[i]);
}
i++;
}
else
{
sDecomp = sDecomp + CommunicationTools.byteToString(data[i]);
}
}
//DLE STX and CRC
for (int i = length - 4; i < length; i++)
{
sDecomp = sDecomp + CommunicationTools.byteToString(data[i]);
}
return(CommunicationTools.stringToByteArray(sDecomp));
}
else
{
return(data);
}
}
/// <summary>
/// compress a data array - 0x00 and 0xff values will be compress
/// 0x10 must send in twice in the data set
/// </summary>
/// <param name="data">uncompress data-array</param>
/// <returns>compress data-array</returns>
private byte[] compressDataStream(byte[] data)
{
int length = data.Length;
string sComp = "";
byte compZeroCounter = 0;
byte compFFCounter = 0;
for (int i = 0; i < length; i++)
{
if (data[i] == 0x10)
{
sComp = sComp + CommunicationTools.byteToString(0x10) + CommunicationTools.byteToString(0x10);
}
if (data[i] == 0x00 && compFFCounter == 0)
{
compZeroCounter++;
}
else if (data[i] == 0xff && compZeroCounter == 0)
{
compFFCounter++;
}
else
{
if (compFFCounter != 0)
{
sComp = sComp + CommunicationTools.byteToString(0xff) + CommunicationTools.byteToString(compFFCounter);
compFFCounter = 0;
if (data[i] == 0x00)
{
compZeroCounter++;
}
}
else if (compZeroCounter != 0)
{
sComp = sComp + CommunicationTools.byteToString(0x00) + CommunicationTools.byteToString(compZeroCounter);
compZeroCounter = 0;
if (data[i] == 0xff)
{
compFFCounter++;
}
}
if (compZeroCounter == 0 && compFFCounter == 0)
{
if (data[i] == 0x10)
{
sComp = sComp + CommunicationTools.byteToString(data[i]) + CommunicationTools.byteToString(data[i]);
}
else
{
sComp = sComp + CommunicationTools.byteToString(data[i]);
}
}
else if (i == length - 1)
{
if (compFFCounter != 0)
{
sComp = sComp + CommunicationTools.byteToString(0xff) + CommunicationTools.byteToString(compFFCounter);
}
else if (compZeroCounter != 0)
{
sComp = sComp + CommunicationTools.byteToString(0x00) + CommunicationTools.byteToString(compZeroCounter);
}
}
}
}
return(CommunicationTools.stringToByteArray(sComp));
//return CommunicationTools.unicodeStringToASCIIByteArray(sComp, codePage);
}
/// <summary>
/// trigger by incoming data
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void _serial_DataReceived(object sender, ReceivedDataEventArgs e)
{
if (e.ReceivedData.Length > 1)
{
byte[] answer = e.ReceivedData;
string sAnswer = string.Empty;
byte LRC = 0x00;
byte checkLRC = 0x00;
bool beginMessage = false;
bool endMessage = false;
for (int i = 0; i < answer.Length; i++)
{
if (answer[i] == _cc_STX)
{
LRC = 0x00;
beginMessage = true;
endMessage = false;
LRC += answer[i];
}
else if (beginMessage == true)
{
if (answer[i] == _cc_ETX)
{
beginMessage = false;
endMessage = true;
}
else
{
sAnswer += CommunicationTools.byteToString(answer[i]);
}
LRC += answer[i];
}
else if (endMessage)
{
checkLRC = answer[i];
break;
}
}
LRC = (byte)((0xff - LRC) + 0x01);
if (LRC != checkLRC)
{
if (OnCRCError != null)
{
//OnCRCError(this, new EventArgs());
ThreadSafe.Invoke(this.OnCRCError, new object[] { this, new QCommunicationCRCEventArgs(sAnswer, answer, checkLRC, LRC) });
}
}
if (OnIncomingData != null) //
{
//OnIncomingData(this, new QCommunicationEventArgs(answer, decompressData));
ThreadSafe.Invoke(this.OnIncomingData, new object[] { this, new QCommunicationEventArgs(sAnswer, answer) });
}
}
else
{
if (e.ReceivedData[0] == _cc_ACK)
{
if (OnACKMessage != null)
{
ThreadSafe.Invoke(this.OnACKMessage, new object[] { this, EventArgs.Empty });
}
}
else if (e.ReceivedData[0] == _cc_NAK)
{
if (OnNAKMessage != null)
{
ThreadSafe.Invoke(this.OnNAKMessage, new object[] { this, EventArgs.Empty });
}
}
else if (e.ReceivedData[0] == _cc_SYN)
{
if (OnSYNMessage != null)
{
ThreadSafe.Invoke(this.OnSYNMessage, new object[] { this, EventArgs.Empty });
}
}
}
}