string SendBurnHandshake(byte op)
{
EnsureBurnMode();
CommandBlockWrapper cbw = CommandBlockWrapper.Create(true);
cbw.dCBWTag = 0x4b485348 + (uint)op;
cbw.dCBWDataTransferLength = 32;
cbw.bCBWCBLength = 2;
cbw.CBWCB[0] = 0xf8;
cbw.CBWCB[1] = op;
WriteToUSB(StructToBytes(cbw));
byte[] handshakeResponse = ReadFromUSB(32);
byte[] cswBytes = ReadFromUSB((uint)Marshal.SizeOf(typeof(CommandStatusWrapper)));
CommandStatusWrapper csw = BytesToStruct <CommandStatusWrapper>(cswBytes);
if (csw.dCSWSignature != CommandStatusWrapper.SIGNATURE)
{
return(null);
}
if (csw.dCSWTag != cbw.dCBWTag)
{
return(null);
}
if (csw.bCSWStatus != 0)
{
return(null);
}
return(Encoding.ASCII.GetString(handshakeResponse).TrimEnd('\0'));
}
