Serin serout problem

[skimask]

HI, NO I have not found the problem . I was about to order some pic16f648a, you told it worked with these chips.

I tried your program , the No sync appears at every increment,
so guess there is a problem with the trailer or leader bit.

k

I wouldn't order any '648's or '628's, the 'F88 should be just fine.

What does the display read? Does it show the hardcoded 444 and 888? Did you try removing that? Also, get rid of the pauses in the receiver code, or at least drop them down a bit, cut them in half or so.

JUST SAW THIS: In the transmit code, the trailer byte should be a $55, not $ff. That'll probably fix it now. The fact that you said it shows 'No Sync' at 'EVERY INCREMENT' is the key thing, it shows that the loop is going thru the SERIN commands now.