what is a even odd parity checker?

Question

I['m trying to design an even odd parity checker, but I don't know what is

Answer 1

It tells you if the number of 1 bits in some chunk if data is odd or even. The chunk is usually a byte (as in serial data).

In hardware, all you need to add is a D flipflop set up to toggle (fed Qbar back to D).
Clear (or set) it on start of byte.
Clocked by the AND product of the the data and clock. Each one will casue the FF to toggle - alternating, in effect, 'odd-even'.

In software, same idea
int oddparity( int byte )
{
int p = 0; /* initialize 0 for odd, 1 for even */
int mask = 0x080;
while( mask )
{
if( mask & byte )
{
p = 1 - p;
}
mask >>= 1;
}
return p;
}
(You can do a direct lookup for fatser results)

Answer 2

Not sure if it is even used anymore, but, it used to be used on RAM, back in the earlier days of computers.

Answer 3

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