Eh too soon sending this.. So after that you should go back to the
original code, but if you have not define section, then it is pretty
hard to tell the linker to get back the first page.

Tamas


On Mon, Feb 1, 2010 at 8:15 PM, Tamas Rudnai <tamas.rudnai@gmail.com> wrote:
> Hi,
>
> Are you using linker or absolute code? Generally it is not a good idea
> to mix the two, and I think you would better go with linker. Then you
> can modify the linker script and can define a section as 'protected'
> for the table and your ordinary code into the first page.
> Alternatively you can use something like:
>
> bigtable =A0 =A0code =A0 =A00x800
>
> Tamas
>
>
>
> On Mon, Feb 1, 2010 at 7:45 PM, Brendan Gillatt
> <brendan@brendangillatt.co.uk> wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> Hello,
>> I have a gigantic data table stored in Flash memory on a PIC16F1936:-
>> greater than 3K words arranged as a series of dt statements. I'm using
>> the INDFn registers and MOVIW instructions to access the data so it
>> doesn't really matter where it is placed for it to still work.
>>
>> When I link together the various relocatable modules in my code some end
>> up before and some after the data table.
>>
>> The problem is that I have to use PAGESEL to jump to those bits of code
>> after the table. I know that all of my code will fit in the first page,
>> and speed is important in this application, so I would rather avoid
>> PAGESEL altogether and have all the executable code in the first page and
>> lump the table anywhere on the end.
>>
>> For fairly obvious reasons I would rather not specify exactly where every
>> module resides in memory but still some how force the linker to place the
>> table afterwards.
>>
>> I have tried to specify where to place the table by absolutely
>> positioning it in memory:
>>
>> TABLE_SECTION =A0 CODE =A0 =A00x800
>>
>> BIGTABLE =A0 =A0 =A0 =A0dt =A0 =A0 =A00x00, 0x01, 0x00, 0x02
>> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0dt =A0 =A0 =A00x01, 0x31, 0x00, 0x42
>>
>> etc...
>>
>> However this doesn't change the link order--it still puts the same code
>> modules after the table (just shifted even further up the Flash)
>>
>> Am I missing something obvious or is there really no way around this iss=
ue?
>>
>> I'm using "MPASMWIN.exe v5.35, mplink.exe v4.35" with MPLAB v8.43 and the
>> standard linker file.
>>
>> Thank you very much if you can help.
>>
>>
>> - --
>> Brendan Gillatt | GPG Key: 0xBF6A0D94
>> brendan {a} brendangillatt (dot) co (dot) uk
>> http://www.brendangillatt.co.uk
>> -----BEGIN PGP SIGNATURE-----
>> Version: GnuPG v1.4.7 (MingW32)
>>
>> iD8DBQFLZy9YHEhZ5Ws5poERAn4SAKC7il/JjFj+mXt9To8g4sZGANoR6wCfTUQD
>> m9vWgUD0GCtW1IFLK/Z+r94=3D
>> =3D6YfB
>> -----END PGP SIGNATURE-----
>> --
>> http://www.piclist.com PIC/SX FAQ & list archive
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>
>
>
> --
> /* www.mcuhobby.com */ int main() { char *a,*s,*q; printf(s=3D"/*
> www.mcuhobby.com */ int main() { char *a,*s,*q; printf(s=3D%s%s%s,
> q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
> q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }
>



-- =

/* www.mcuhobby.com */ int main() { char *a,*s,*q; printf(s=3D"/*
www.mcuhobby.com */ int main() { char *a,*s,*q; printf(s=3D%s%s%s,
q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }",
q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); }

-- =

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