> > code available for a software UAR that uses the RB0 interrupt
>
> You might want to check out the I/O section at www.piclist.com
> There are interrupt and interruptless code samples
>
> I plan to use RB0 interrupts but can't say how soon it will
> before I have any presentable code. Still pencil-sketching

Jinx,
I think he wants to *only* use RB0 ints to receive each "bit".  This would
be impossible without using a timer, of some sort, to figure out how many
consecutive bits you didn't get an interrupt for.  IIRC, if you trigger on
the start bit, you (not specifically you Jinx, but you know what I mean
;-D) wouldn't even be guaranteed an interrupt on the stop bit.  I don't see
any "feasible" way to receive serial data using *only* RB0/INT's.

If your gonna have to use a timer anyway, then you would just use RB0/INT to
get the first bit, and TMR0 ints to trigger interrupts at the appropriate
time to receive the data bits and stop bit.

However, if it *can* be done, I'm sure you could think of a way Jinx.  ;-)

michael brown

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