MARK D NEWPORT wrote: > > I'm trying to build a little serial backpack for an LCD screen (16x1) > and am already using the external interupt for the busy flag. anyway I > was wondering if anyone had any code for a serial in routine that used > timing delay loops. I would like to keep my standard 4MHz crystal > instead of that wacky 3.6838 or whatever that one is. Do the delays > have to be accurate when coming into the pic? I have a serial out > routine that uses these loops and is slightly off, but still works with > my computer. thanks What controller are you using? 3.6864MHz (if that's the number you were trying to think of) is not so wacky if you're using a PIC with an embedded USART. --Matt