Contant pointers in C

[parveen]

Posted on December 22, 2003 at 05:36

Contant pointers in C

[parveen]

Posted on December 11, 2003 at 00:44

Has anyone tried to use pointer declaration with const prefix in C. Normally any declaration with const prefix goes to ROM or const segment but when I declare a pointer array with const prefix it goes to data segment.

const unsigned char * MyPtr[]={}; I want MyPtr to be stored in ROM I have tried this with both Metrowerks and Cosmic compliers Thanks in advance, Regards, praveenG

[seeguard]

Posted on December 11, 2003 at 06:17

Try this:

#pragma INTO_ROM const unsigned char * MyPtr[]={}; then look in the MAP file and check: - VARIABLES: MyPtr address len ( 2) ROM_VARatz

[parveen]

Posted on December 11, 2003 at 10:53

Thanks a lot

It really works for Metrowerks. Could you suggest some method for Cosmic compiler also. Does anyone knows how to do the same for cosmic compiler???? Thanks again Regards, PraveenG

[sjo]

Posted on December 11, 2003 at 20:33

To make the pointer constant in cosmic do the following:

const unsigned char * const pString = ''string''; Regards sjo

[parveen]

Posted on December 12, 2003 at 06:01

Thanks a lot

it works for cosmic also Regards, PraveenG

[parveen]

Posted on December 22, 2003 at 05:36

I recently found out that Metrowerks has one technical note on this topic

Refer TN102:Contant pointer and pointer to constant (Search TN102 on www.metrowerks.com) Regards, Parveen[ This message was edited by: praveenG on 22-12-2003 10:07 ]