Hello Olin & Picers,


----- Original Message ----- 
From: "Olin Lathrop" <olin_piclist@embedinc.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Tuesday, July 21, 2009 11:40 PM
Subject: Re: [PIC] IDE Watch window


> JohnSanderson wrote:
>>  UDATA_ACS  for shared variables
>>  UDATA  0x0100 for the maths source
>>  UDATA  0x0200 for the main source
>
> Making sections absolute when they don't really need to be is a bad idea.
> Only one module in the whole project can use UDATA h'100'.  If another
> module tries to do this too, the two sections will collide and you will
> get
> the "can not fit section" linker error.  You would also be hard coding
> where
> the banked memory in bank 0 starts, which varies between parts.  Yucc.
>

..
    Absolute coding, bad idea. Sounds fair, I just did it out of a desire to
    define everything.    Not a necessity.

    Anyway, there were no linker errors and the .map file showed that all
    the GPR data had a place of its own.

    The question was posed to seek reason/s  why the watch window
    would not update and display GPRs for data bank2 and higher.
    Currently I'm running with all the data fitting into banks0 & 1 so
    I'm able to watch everything I need. Still no further to finding out why
    I can't see into banks2+.

    I've tested this with other legacy code that definitely works properly, 
so
    it has to be the case that Real-Ice/IDE is failing to display values 
that really
    do exist.

..


> Why not just do it right?  If you want to force particular banks at
> assembly
> time, create named sections in the linker for each bank.  Then reference
> these named sections in the source code:
>
> bank1  udata
>
> Any number of modules can do this, and there won't be a error unless the
> total memory requested for bank 1 exceeds the size of bank 1.
>
> See my linker files where I set up named sections for exactly this
> purpose.
>
>> For debugging I want to watch what's happening with a whole
>> selection of fregs.
>
> What's a "freg"?
>

..
    GPRs
..



            best regards,   John


eMail from the desk of John Sanderson.
JS Controls cc. Manufacturer and purveyor of Force testing
apparatus.
john@jscontrols.co.za
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