Microchip PIC Forum: Re: [piclist] Need Help Urgently - Mysterious Problem after adding Function

Saturday, December 8, 2007

Re: [piclist] Need Help Urgently - Mysterious Problem after adding Function

Is your code overflowing page 0 and into page 1?

I don't believe MPLAB throws this up as an error.

Have a look through the listing and follow the addresses up to page 1

www.murtonpikesystems.co.uk

-------Original Message-------

From: Roger_4U

Date: 12/09/07 01:04:41

To: piclist@yahoogroups.com

Subject: [piclist] Need Help Urgently - Mysterious Problem after adding Function

Hi Folks:

I am up a creek, I have been working on some code for over a year and
I am totally stumped with this last problem:

Device: Pic16F88
Chip OSC: 20Mhz
Programmer: MeLabs USB Programmer
Code is spread across two codepages. i.e Linker is being used.
Number of Software Modules: 4 [3 in CodePage0 and 1 in CodePage1]
Assembler/Complier: MPLAB IDE v8.00
Serial speed: 57.6Kbps

My problem is that the circuit stops working properly once I add a new
sub-program (function) to CodePage0; and what is totally baffling is
that even if I comment out the call in the main program to this
function, the problem still persists. When I reduce the size of the
function by say 7 statements, the serial portion, a LED switch, and
the blinking LED, work as expected. However when I have all the code
present, everything seems to be still working except the serial part
of the circuit which starts sending out mixed up data.

I have changed the chip, upgraded to the latest IDE, and still the
same problem.

What is going on here? PLEASE HELP - I feel like jumping ship and
starting over from scratch with a different platform (e.g AVR).