private void _Send(byte cmd, SendParam param)
{
byte[] DataToSend = new byte[mDataByteNum];
DataToSend[0] = 0Xfa;
DataToSend[1] = cmd;
DataToSend[2] = param.HD;
DataToSend[3] = param.LD;
DataToSend[4] = (byte)(cmd + param.HD + param.LD);
DataToSend[5] = (byte)(DataToSend[4] + 1);
mSerial.Send(DataToSend);
}
