private bool AddPacket(byte[] buffer, int startIndex)
{
LCDPacket packet = CreatePacket(buffer, startIndex);
ushort calculatedCRC = CRCGenerator.GenerateCRC(buffer, startIndex, packet.DataLength + 2, CRC_SEED);
switch (packet.PacketType)
{
case LCDPacket.LCDPacketType.NORMAL_RESPONSE:
AddResponsePacket(packet);
break;
case LCDPacket.LCDPacketType.NORMAL_REPORT:
AddReportPacket(packet);
break;
case LCDPacket.LCDPacketType.ERROR_RESPONSE:
AddResponsePacket(packet);
break;
}
if (calculatedCRC != packet.CRC)
{
Console.WriteLine("CRC ERROR!!!: Calculated CRC={0} Actual CRC={1}", Convert.ToString(calculatedCRC, 16), packet.CRC);
return(false);
}
return(true);
}
private LCDPacket Send(byte type, byte dataLength, byte[] data)
{
ushort crc;
if ((null == data && dataLength != 0) || dataLength > data.Length)
{
throw new ArgumentException("bad data sent to Send");
}
packetXMitBuffer[0] = type;
packetXMitBuffer[1] = dataLength;
if (0 != dataLength)
{
Array.Copy(data, 0, packetXMitBuffer, 2, dataLength);
}
crc = CRCGenerator.GenerateCRC(packetXMitBuffer, dataLength + 2, CRC_SEED);
packetXMitBuffer[2 + dataLength + 1] = (byte)(crc >> 8);
packetXMitBuffer[2 + dataLength] = (byte)crc;
lock (responseSignal)
{
responsePacket = null;
// comPort
com.Write(packetXMitBuffer, 0, dataLength + 4);
if (Monitor.Wait(responseSignal, MAX_RESPONSE_TIME))
{
return(responsePacket);
}
}
return(null);
}