Well, I'm having a bit of trouble with come code so firs let me describe the
context:



PIC-18 from Hi-tech + MPLAB -> HEX file

JOLT Bootloader (so the pic-18 has the -a0x200 modifier to add the offset
for the bootloader)

PIC18F452 @ 24MHz (6MHz and HS-PLL mode)

lcd display with well known working routines

rs-232 serial interface

WDT - OFF

BOD - OFF

OSC_SW - OFF





Ok, the program I made worked fine, real fine until last Friday. What it
does? Well, it's a simple menu application, it has lots of pointers and
stuff like that, but it DOESN'T have any function pointers. The actual
problem is that when a insert some lines of code (meaningless lines) the
code refuses to work properly. For example, adding "send_232_byte( DATA)"
makes the program reset. Let's clear that up. The send_232. routine is a
working thing, tested on many projects and it's actually a simple polling
send routine.

When I said reset, I mean that the program resets itself (sometimes)
periodically. Perhaps I remove that line and everything seems to work, but
if I add, for example,

"a = a/5;" it's fails again, always the same way.



The code, as I said, has a 60 items struct (40 bytes each) plus some more
long arrays of data. The code also has a long (18 items) switch/case
statement, which I read gives some problem, but I'm not sure and couldn't
really find more info on that.



Yeah, I know, you are thinking "it's the stack man!" mmmm sorry but don't
think so. The map file shows me that the stack never reach the 8th level.
and it has 32.. Also manually put a "goto $" at address 0xFFFE to see it the
program reaches that address and roll back to address 0 but nothing
happened, the code keeps reseting. I have placed a copy of the code and
bootloader code for anyone who can help at
www.janso.com.ar/download/files.zip there is a file something_test that you
shoul ignore.



Oh, I've tried to manually save the code to the pic and It also fails to
work properly (no bootloader, and not offset)



Also, there is another (related) problem: If I remove the global
optimization option -ZgN the code fails to work completely, it actually
prints all 0's to the LCD display instead of the usuall screen, that realy
knock me out.



Any ideas?

Best regards,



Mauricio D. Jancic

Janso Desarrollos - Microchip Consultant

(54) 011 - 4542 - 3519

Lugones 3238 "B" - C1430ECN

www.janso.com.ar

info@janso.com.ar

MSN: jansodesarrollos@hotmail.com




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