Hi Erik,

I am not reading 256 bytes from the lookup table, instead its only 8 bytes and that's it.

The serial encoded data sends 8 bytes which have to be compared with the bytes in the look up table.

If match is 100% then its Ok, else its bad data and is rejected and the program goes back to the start where it waits for the next data stream from the encoder.

I am not using any timer or interrupts. Just using r0 and r1 for counting the pulse width.

Simon