Fast way to reverse the bits in a byteThis tip submitted by John Hite on 2013-06-24 23:37:38. It has been viewed 388 times.
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Sometimes speed is more important than space so if you have room for an array of 256 just put the reverse of the address in each location.
unsigned char reverse =
0, 0x80, 0x40, 0xC0, 0x20, 0xA0, ...
When you get the backwards byte just use it as the subscript of this array to fetch its reverse.
Instead of creating arrays like this by hand I write a short prog in VC++ and then copy/paste the output window contents into my code.
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