private ushort ReadRegister(byte reg)
{
uint cmd = 0x80000000 | (((uint)reg) << 17);
if (!CalcParity(cmd))
{
cmd |= 1u;
}
// big endian 102
byte[] buf = new byte[]
{
(byte)((cmd >> 24) & 0xff),
(byte)((cmd >> 16) & 0xff),
(byte)((cmd >> 8) & 0xff),
(byte)(cmd & 0xff)
};
m_spi.Write(buf, 4);
m_spi.Read(false, buf, 4);
if ((buf[0] & 0xe0) == 0)
{
return(0); // error, return 0
}
return((ushort)((BytesToIntBE(buf) >> 5) & 0xffff));
}