Saw something like this in a dsPIC30 running MPLAB and SIM.  The MPLAB=20
environment doesn't want to switch to the include file for debugging. I=20
simply wrote it off as a limit of MPLAB SIM and started pasting in the=20
contents of the include and not ever using includes for
anything but register definitions.

You might want to go thru Microchip tech support to see if they have any=20
suggestions. (NOT FORUMS, just the Tech support).  There
may be some setup stuff in MPLAB that fixes that.  ASM30 has some odd stuff=
=20
(compared to the 16F/18F environment) and that may
be in the list of "odd"

MPLAB doesn't handle exceptions very well and there may be one generated=20
when the program tries to step into the include.  I had
a math error and it took me forever to get the math error interrupt trap to=
=20
catch it.  MPLAB would simply go back to __reset.  It
turns out that the default handler for any rupt not explicitly decalred is=
=20
__reset (Dug that out of the linker script) at least for the dsPIC30

----- Original Message -----=20
From: "Steve Smith" <xygax@blueyonder.co.uk>
To: "'Microcontroller discussion list - Public.'" <piclist@MIT.EDU>
Sent: Tuesday, November 27, 2012 3:09 PM
Subject: [PIC] MPLAB problem


> Guys....
>
> I have a problem.... I have just started with 24F's in ASM30 and have run
> into a stubborn issue. I have a simple piece of code that kicks a text
> display into life.
>
> The main code operates from the reset to the first call to a subroutine=20
> that
> is in an included file. At this point the simulator goes back to the=20
> __reset
> line in the main source code instead of switching to the included file. I=
f=20
> I
> have the code in line in the main file it simulates properly. It does thi=
s
> with both MPLAB Sim and ICD3.
>
> When ICD3 is the target the program runs on the device properly it also
> displays as expected in the disassembly listing.
>
> This was never a problem with and 8 bit device and I cant drive 'C' yet=20
> and
> there is very sparse web recourses on ASM30 at all...
>
> Thanks in advance
>
> Steve
>
>
>
> Main code segment
>
>
> .equ __p24FJ256GB210.inc, 1
> ;
> .include "p24FJ256GB210.inc"
> ; INCLUDE FILES
> .global __reset ; reset vector
> .global __T2Interrupt ; Timer ISR entry
>
> .global delay
>
> .section __CONFIG_REG.sec, code
> .global __CONFIG_REG
> __CONFIG_REG: .pword POSCMOD_NONE & IOL1WAY_ON & OSCIOFNC_OFF &
> FCKSM_CSECMD & FNOSC_FRCPLL & PLL96MHZ_ON & PLLDIV_DIV2 & IESO_ON
>
> .DATA           ; Switch to DATA RAM segment:
>  Flag_0:  .space  2       ; Reserve two bytes (one 16-bit word) in a
> DATA RAM space for FLAGS bits
> ; Bit assignments in Flag_0:
>  Tick   =3D 0             ; Bit 0 in Flag_0 is named Tick
>
> .extern Start_TXT
> .extern TXT_Cmd
> .extern TXT_Dta
>
>
> ; Start of executable code:
>
> __reset:
>
> bra Init
>
> .include "interrupt.s" ; int handlers
>
> Init:
>
> mov     #__SP_init,W15 ; Initialise stack pointer and stack
> limit register,
> mov     #__SPLIM_init,W0 ; __SP_init and __SPLIM_init values
> are defined at compile/link time.
> mov     W0,SPLIM ;
> nop
>
> ; bset T2CON,#TCS ; int/2 and on and /8
> bset T2CON,#TCKPS0
> bset T2CON,#TON
> bset IPC0,#T2IP0 ; timer 1 lowest priority
> bset IEC0,#T2IE ; enable int
>
>
>
>
>
> call Start_TXT ; THIS IS THE CALL THAT GOES
> WRONG
> nop
> mov.b #'F',W0
> call TXT_Dta ; .....and then
>
> .include "TextDisplay.inc" ; this is currently at the
> bottom of code but it fails in the same way where ever it gets put !!!
>
>
> TextDisplay.inc
>
>
> .global Start_TXT
> .global TXT_Cmd
> .global TXT_Dta
> .extern delay
> ;-------------LCD Port setup with standard text
> module-----------------------
> Start_TXT:
> mov #0b1111101111111011,W0
> mov W0,TRISD ; RS,E outputs
> nop
> bclr PORTD,#0x02 ; E low
> clr PORTE
>
> mov #0xFF00,W0 ; E0-7
> mov W0,TRISE ; make outputs
>
> mov.b #0x38,W0 ; 8 bit
> call TXT_Cmd
>
> There is more here
>
> --=20
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist=20

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