Regard, Aaron!
send piece of the code ( processing the interruptions ).
Try to understand.

Vadim
vad@anet.lv

-----Original Message-----
From:   Aaron Hickman [SMTP:hickmaab@DREXEL.EDU]
Sent:   Saturday, December 26, 1998 5:27 AM
To:     PICLIST@MITVMA.MIT.EDU
Subject:        RB4-RB7 Interrupt Blues!

Arrggghh!

        To save my sanity, I desperately need some guidance from any of
you PIC guru's out there!  In an effort to transmit data via RF modules,
I am attempting to write some code that transmits/receives manchester
encoded data.  On the receiving side I am using a combination of TMR0,
RB0 INT and RB interrupt on change features.  I am unable to get the RB
interupt on change INT's to work.  I have checked all the obvious errors,
ie. making sure the PORTB is read just prior to expected transition on
pin, actually turning on RBIE and GIE, etc.
        Looking at the code from the simulator's perspective, all is
cool.  When I set the RBIF flag, the interrupt is seen and the proper
jump is executed.  However, when I drop the chip in the circuit, and look
at the execution using a scope (I use a free PORTB pin to indicate code
progrss), I can see that the pin never catches the changing slope and
ends up timing out via the TMR0 interrupt.
        I would greatly appreciate any suggestions or guidance from any
kind soul out there, as I would like to nail this coffin shut and enjoy
the holidays while school is out.

Merry Christmas,

Aaron