public void ProcessData(byte[] data)
{
byte dataCrcHighByte, dataCrcLowByte;
for (int i = 0; i < data.Length; i++)
{
switch (currentState)
{
case ProcessingState.WAITING_FOR_START_OF_HEADER:
if (data[i] == START_OF_HEADER)
{
currentCRC = XModemCRC.CalculateCRC(data[i], 0);
currentState = ProcessingState.WAITING_FOR_SYSTEM_ID;
}
break;
case ProcessingState.WAITING_FOR_SYSTEM_ID:
if (data[i] == SYSTEM_ID)
{
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_SUBSYSTEM_ID;
}
else
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_SUBSYSTEM_ID:
if (data[i] == SUBSYSTEM_ID)
{
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_NODE_ID;
}
else
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_NODE_ID:
if (data[i] == NODE_ID)
{
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_COMPONENT_ID;
}
else
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_COMPONENT_ID:
if (data[i] == COMPONENT_ID)
{
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_MAJOR_SOFTWARE_VERSION;
}
else
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_MAJOR_SOFTWARE_VERSION:
if (data[i] <= MAJOR_SOFTWARE_VERSION)
{
majorSoftwareVersion = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_MINOR_SOFTWARE_VERSION;
}
else
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_MINOR_SOFTWARE_VERSION:
if ((majorSoftwareVersion == MAJOR_SOFTWARE_VERSION && data[i] <= MINOR_SOFTWARE_VERSION) || (majorSoftwareVersion < MAJOR_SOFTWARE_VERSION))
{
minorSoftwareVersion = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_MESSAGE_ID_0;
}
else //if majorSoftwareVersion == MAJOR_SOFTWARE_VERSION && minorSoftwareVersion > MINOR_SOFTWARE_VERSION
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_MESSAGE_ID_0:
messageIdHighByte = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_MESSAGE_ID_1;
break;
case ProcessingState.WAITING_FOR_MESSAGE_ID_1:
messageIdLowByte = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_PAYLOAD_LENGTH;
break;
case ProcessingState.WAITING_FOR_PAYLOAD_LENGTH:
payloadLength = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
if (payloadLength > 0)
{
payload = new byte[payloadLength];
payloadPosition = 0;
currentState = ProcessingState.PROCESSING_PAYLOAD;
}
else //payloadLength == 0
{
payload = null;
currentState = ProcessingState.WAITING_FOR_CRC_BYTE_0;
}
break;
case ProcessingState.PROCESSING_PAYLOAD:
payload[payloadPosition++] = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
if (payloadPosition >= payloadLength)
{
currentState = ProcessingState.WAITING_FOR_CRC_BYTE_0;
}
break;
case ProcessingState.WAITING_FOR_CRC_BYTE_0:
CRC_BYTE_0 = data[i];
currentState = ProcessingState.WAITING_FOR_CRC_BYTE_1;
break;
case ProcessingState.WAITING_FOR_CRC_BYTE_1:
CRC_BYTE_1 = data[i];
dataCrcHighByte = (byte)(currentCRC >> 8);
dataCrcLowByte = (byte)(currentCRC & 0x00FF);
if ((dataCrcHighByte == CRC_BYTE_0) && (dataCrcLowByte == CRC_BYTE_1))
{
owner.LogData(new Message(majorSoftwareVersion, minorSoftwareVersion, messageIdHighByte, messageIdLowByte, payload));
}
else //Failed CRC Check
{
crcCheckFails++;
}
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
break;
default:
MessageBox.Show("Unexpected Default Case in Process Data");
break;
}
}
}
public int ProcessData(byte[] data)
{
busy = true;
//TODO - take these out and turn functions back into void function
DateTime timestamp1 = DateTime.Now;
DateTime timestamp2;
byte dataCrcHighByte, dataCrcLowByte;
for (int i = 0; i < data.Length; i++)
{
switch (currentState)
{
case ProcessingState.WAITING_FOR_START_OF_HEADER:
if (data[i] == START_OF_HEADER)
{
timestamp = DateTime.Now;
currentCRC = XModemCRC.CalculateCRC(data[i], 0);
currentState = ProcessingState.WAITING_FOR_SYSTEM_ID;
}
break;
case ProcessingState.WAITING_FOR_SYSTEM_ID:
if (data[i] == SYSTEM_ID)
{
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_SUBSYSTEM_ID;
}
else
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_SUBSYSTEM_ID:
if (data[i] == SUBSYSTEM_ID)
{
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_NODE_ID;
}
else
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_NODE_ID:
if (data[i] == NODE_ID)
{
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_COMPONENT_ID;
}
else
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_COMPONENT_ID:
if (data[i] == COMPONENT_ID)
{
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_MAJOR_SOFTWARE_VERSION;
}
else
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_MAJOR_SOFTWARE_VERSION:
if (data[i] <= MAJOR_SOFTWARE_VERSION)
{
majorSoftwareVersion = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_MINOR_SOFTWARE_VERSION;
}
else
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_MINOR_SOFTWARE_VERSION:
if ((majorSoftwareVersion == MAJOR_SOFTWARE_VERSION && data[i] <= MINOR_SOFTWARE_VERSION) || (majorSoftwareVersion < MAJOR_SOFTWARE_VERSION))
{
minorSoftwareVersion = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_MESSAGE_ID_0;
}
else //if majorSoftwareVersion == MAJOR_SOFTWARE_VERSION && minorSoftwareVersion > MINOR_SOFTWARE_VERSION || majorSoftwareVersion > MAJOR_SOFTWARE_VERSION
{
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
goto case ProcessingState.WAITING_FOR_START_OF_HEADER;
}
break;
case ProcessingState.WAITING_FOR_MESSAGE_ID_0:
messageIdHighByte = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_MESSAGE_ID_1;
break;
case ProcessingState.WAITING_FOR_MESSAGE_ID_1:
messageIdLowByte = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
currentState = ProcessingState.WAITING_FOR_PAYLOAD_LENGTH;
break;
case ProcessingState.WAITING_FOR_PAYLOAD_LENGTH:
payloadLength = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
if (payloadLength > 0)
{
payload = new byte[payloadLength];
payloadPosition = 0;
currentState = ProcessingState.PROCESSING_PAYLOAD;
}
else //payloadLength == 0
{
payload = null;
currentState = ProcessingState.WAITING_FOR_CRC_BYTE_0;
}
break;
case ProcessingState.PROCESSING_PAYLOAD:
payload[payloadPosition++] = data[i];
currentCRC = XModemCRC.CalculateCRC(data[i], currentCRC);
if (payloadPosition >= payloadLength)
{
currentState = ProcessingState.WAITING_FOR_CRC_BYTE_0;
}
break;
case ProcessingState.WAITING_FOR_CRC_BYTE_0:
CRC_BYTE_0 = data[i];
currentState = ProcessingState.WAITING_FOR_CRC_BYTE_1;
break;
case ProcessingState.WAITING_FOR_CRC_BYTE_1:
CRC_BYTE_1 = data[i];
dataCrcHighByte = (byte)(currentCRC >> 8);
dataCrcLowByte = (byte)(currentCRC & 0x00FF);
if ((dataCrcHighByte == CRC_BYTE_0) && (dataCrcLowByte == CRC_BYTE_1))
{
owner.LogData(new Message(majorSoftwareVersion, minorSoftwareVersion, messageIdHighByte, messageIdLowByte, payload, timestamp));
}
else //Failed CRC Check
{
crcCheckFails++;
}
currentState = ProcessingState.WAITING_FOR_START_OF_HEADER;
break;
default:
MessageBox.Show("Unexpected Default Case in Process Data");
break;
}
}
//TODO - take timestamp comparision out
timestamp2 = DateTime.Now;
int time;
if (timestamp1.Millisecond > timestamp2.Millisecond)
{
time = timestamp2.Millisecond + (1000 - timestamp1.Millisecond);
}
else
{
time = timestamp2.Millisecond - timestamp1.Millisecond;
}
busy = false;
return(time);
}
