Re: [Mspgcc-users] bit reverse byte fn()

[Leon Heller]

Here's a clever way to do it that I found via Google:

//
// Reverse the order of bits within a byte.
// Returns: The reversed byte value.
//
BYTE ReverseBits(BYTE b)
{
  BYTE c;
  c  = ((b >>  1) & 0x55) | ((b <<  1) & 0xaa);
  c |= ((b >>  2) & 0x33) | ((b <<  2) & 0xcc);
  c |= ((b >>  4) & 0x0f) | ((b <<  4) & 0xf0);
    return(c);
}

I haven't checked it, though.

Leon Heller, G1HSM
Email: aqz...@dsl.pipex.com
My low-cost Philips LPC210x ARM development system:
http://www.geocities.com/leon_heller/lpc2104.html