Hi Frederic,
If you declare data with the const attribute it goes in the same place
as the code. Is that what you want to know, or are you looking to force
the const data into a very specific area of flash? That is also possible
by using an attribute, and modifying the default linker file to define
another segment in the required area. For example, I have a 16K device,
in which I put a data table. I want this to be in its own flash page, so
it ca be altered at calibration time. I have this in the .x file for the
linker:
erasabletext (rx) : ORIGIN = 0xc000, LENGTH = 0x200
text (rx) : ORIGIN = 0xc200, LENGTH = 0x3fe0
In a C header file I have this:
#define __erasablemem__ __attribute__ ((section(".erasabletext")))
And then in my code I have things like:
__erasablemem__ const int a_variable;
Regards,
Steve
Frederic Beaulieu wrote:
No one has an idea about this topics?
-------------------------------
Frederic Beaulieu, M.Sc.
Research and Development
NewTrax Technologies Inc.
http://www.newtraxtech.com/
-----Original Message-----
*From:* mspgcc-users-ad...@lists.sourceforge.net
[mailto:mspgcc-users-ad...@lists.sourceforge.net] *On Behalf Of
*Frederic Beaulieu
*Sent:* Wednesday, May 04, 2005 11:27 AM
*To:* mspgcc-users@lists.sourceforge.net
*Subject:* RE: [Mspgcc-users] Put code and const in a same memory section
How I can specified for a memory section which type of data will be
put in there?
-----Original Message-----
*From:* mspgcc-users-ad...@lists.sourceforge.net
[mailto:mspgcc-users-ad...@lists.sourceforge.net] *On Behalf Of
*Frederic Beaulieu
*Sent:* Wednesday, May 04, 2005 11:06 AM
*To:* MSP430 mspgcc Groups
*Subject:* [Mspgcc-users] Put code and const in a same memory section
Hi all,
I try to put a const array in a self-defined memory section (see
hereafter) used originally to put code but I obtained a “section type
conflict”.
I can’t understand why.
Any help will be appreciated
Fred
-----------------------------------------------------------------
Code:
*#define* __downloader_area__ __attribute__ ((section(".downloader")))
*const* Byte1_t __downloader_area__ gb1PdaMessageLength[29];
Linker:
MEMORY
{
…
downloader (rx) : ORIGIN = 0x2500, LENGTH = 0x0b00
…
}
SECTIONS
{
…
.downloader :
{
. = ALIGN(2);
PROVIDE (__downloader_start = .) ;
*(.downloader)
PROVIDE (__downloader_end = .) ;
} > downloader
…
}
-----------------------------------------------------------------
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