How to place Variables into flash instead of RAM?
Guest
#1172219
Hello For testing purposes i wish to place some Structures and/or DataTables into ROM instead of the Onchip RAM. Is there a Way to do so in Sourcecode with some Attributes or Pragmas ? I've tried to search the Forum for that Problem, but no Luck yet .. thanks in advance
Guest
#1172220
well, after a search in the GCC Docs I've found that
"__attribute__ ((section (".text")))" (where ".text" is the sectionname
for my Flashdata)works fine for me. The Compiler issues a warning, but
the Section placement is done correct.
..
LG
Guest
#1172221
Gast wrote: > well, after a search in the GCC Docs I've found that > "__attribute__ ((section (".text")))" (where ".text" is the sectionname > for my Flashdata)works fine for me. The Compiler issues a warning, but > the Section placement is done correct. If you link for flash/ROM: did you try just to add const? Works for me. No need for an attribute.
Guest
#1172222
Martin Thomas wrote: > If you link for flash/ROM: did you try just to add const? Works for me. > No need for an attribute. Hello Martin. Sure, I tried. It doesn't work for me :( The mapfile shows the Data in the .data Section and a Adresslookup from running Program does too. I use CrossStudio for ARM with the GNU-C/C++ 4.1.0. Can you give any Hint to get it work? Maybe a Linkeroption or something.. Just adding const keyword for placing such Data into Flash sounds realy good. Thanks in Advance
Guest
#1172223
It's me again ;) After a short search if found the Fault on my Side. In the Project Propertys the Section for constant Data was antered as .data instead of .rodata. Dont know how this happens, but it works fine now. Thanks again Reply |