code-comp | re-#pragma DATA

My apoligises, part of the question was lost. Here it is in full. hi all, I posted a question recently on this forum and received a very helpful reply from robert(thank you). I just have another question about memory allocation. I wish to use the SDRAM on my c6416 dsk. I have written a command file for my project which I will include below and also I include the syntax I am using for C++ pragma to write a variable to SDRAM. On compiling I get an error saying; warning: pragma DATA_SECTION can only be applied to a file level symbol definition, not work Note - work is the variable im trying to write to SDRAM My command file is as follows; -c -heap 0x50000 -stack 0x90000 /* MODULE MEM */ -stack 0x400 MEMORY { ISRAM : origin = 0x0, len = 0x100000 SDRAM : origin = 0x80000000, len = 0x1000000 FLASH : origin = 0x64000000, len = 0x80000 } SECTIONS { .text :> ISRAM .bss :> ISRAM .cinit :> ISRAM .stack :> ISRAM .sysmem :> SDRAM .const :> ISRAM .switch :> ISRAM .far :> SDRAM .cio :> SDRAM .mydata:>SDRAM } and the syntax I am using with the pragma directive (as got from the Code Composer help) is; #pragma DATA_SECTION(".mydata"); float work; on checking the address of work in the watch window I can see it is still being stored in internal memory. Any help would be greatly appreciated. Niall Barry

Reply by robert ●July 5, 20052005-07-05

Please refer to this webpage: HYPERLINK "http://www.squreshi.com/errata.html"http://www.squreshi.com/errata.html You need another argument in your #pragma call. This pragma is not for work, so work goes into the internal memory by default. Regards, Robert _____ From: code-comp@code... [mailto:code-comp@code...] On Behalf Of theblaahead@theb... Sent: Tuesday, July 05, 2005 4:41 AM To: code-comp@code... Subject: [code-comp] re-#pragma DATA_SECTION with c++ My apoligises, part of the question was lost. Here it is in full. hi all, I posted a question recently on this forum and received a very helpful reply from robert(thank you). I just have another question about memory allocation. I wish to use the SDRAM on my c6416 dsk. I have written a command file for my project which I will include below and also I include the syntax I am using for C++ pragma to write a variable to SDRAM. On compiling I get an error saying; warning: pragma DATA_SECTION can only be applied to a file level symbol definition, not work Note - work is the variable im trying to write to SDRAM My command file is as follows; -c -heap 0x50000 -stack 0x90000 /* MODULE MEM */ -stack 0x400 MEMORY { ISRAM : origin = 0x0, len = 0x100000 SDRAM : origin = 0x80000000, len = 0x1000000 FLASH : origin = 0x64000000, len = 0x80000 } SECTIONS { text :> ISRAM bss :> ISRAM cinit :> ISRAM stack :> ISRAM sysmem :> SDRAM const :> ISRAM switch :> ISRAM far :> SDRAM cio :> SDRAM mydata:>SDRAM } and the syntax I am using with the pragma directive (as got from the Code Composer help) is; #pragma DATA_SECTION(".mydata"); float work; on checking the address of work in the watch window I can see it is still being stored in internal memory. Any help would be greatly appreciated. Niall Barry NEW! You can now post a message or access and search the archives of this group on DSPRelated.com: HYPERLINK "http://www.dsprelated.com/groups/code-comp/1.php"http://www.dsprelated.com/ groups/code-comp/1.php _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: Archives: HYPERLINK "http://www.dsprelated.com/groups/code-comp/1.php"http://www.dsprelated.com/ groups/code-comp/1.php To Post: Send an email to code-comp@code... Other DSP Related Groups: HYPERLINK "http://www.dsprelated.com/groups.php"http://www.dsprelated.com/groups.php

Reply by Niall Barry ●July 6, 20052005-07-06

Hi SAURABH, Using such a syntax gives me a compilation error of "BADLY FORMED PRAGMA", I think the syntax I am using is ok as my project is in C++ and that is , according to the CCS manual the correct syntax for a C++ pragma. The error is solved by declaring the pragma outside of main. However since I need to declare multiple pointers for multiple dynamic arrays which are later initialised is there a way of partioning the memory so as to place enough space between the pointers to support the array. This problem would be alleviated if I could declare the pointers in main when they need to be used. Regards, Niall --- On Wed 07/06, SAURABH < saurabh.shah@saur... > wrote: From: SAURABH [mailto: saurabh.shah@saur...] To: theblaahead@theb... Date: Wed, 6 Jul 2005 09:37:52 +0530 Subject: Re: [code-comp] re-#pragma DATA_SECTION with c++ Hi Niall, The syntax for this pragma is like that, #pragma DATA_SECTION(variable name, "User defined section"); // Even .(dot) is optional So use, #pragma DATA_SECTION(work, ".mydata"); float work; instead of > #pragma DATA_SECTION(".mydata"); > float work; I am sure your problem will be solved. Treat your friends as you do your pictures, and place them in their best light. SAURABH SHAH R&D Engineer Matrix Telecom Pvt. Ltd. ph. - (0265) 2630555 saurabh.shah@saur... ----- Original Message ----- From: <theblaahead@theb...> To: <code-comp@code...> Sent: Tuesday, July 05, 2005 3:10 PM Subject: [code-comp] re-#pragma DATA_SECTION with c++ > My apoligises, part of the question was lost. Here it is in full. > > hi all, > I posted a question recently on this forum and received a very helpful reply from robert(thank you). I just have another question about memory allocation. I wish to use the SDRAM on my c6416 dsk. I have written a command file for my project which I will include below and also I include the syntax I am using for C++ pragma to write a variable to SDRAM. > > On compiling I get an error saying; > warning: pragma DATA_SECTION can only be applied to a file level symbol definition, not work > Note - work is the variable im trying to write to SDRAM > > My command file is as follows; > -c > -heap 0x50000 > -stack 0x90000 > > /* MODULE MEM */ > -stack 0x400 > MEMORY { > ISRAM : origin = 0x0, len = 0x100000 > SDRAM : origin = 0x80000000, len = 0x1000000 > FLASH : origin = 0x64000000, len = 0x80000 > } > > > SECTIONS { > .text :> ISRAM > .bss :> ISRAM > .cinit :> ISRAM > .stack :> ISRAM > .sysmem :> SDRAM > .const :> ISRAM > .switch :> ISRAM > .far :> SDRAM > .cio :> SDRAM > .mydata:>SDRAM > } > > > and the syntax I am using with the pragma directive (as got from the Code Composer help) is; > > #pragma DATA_SECTION(".mydata"); > float work; > > on checking the address of work in the watch window I can see it is still being stored in internal memory. > > Any help would be greatly appreciated. > > Niall Barry > > > > > > > NEW! You can now post a message or access and search the archives of this group on DSPRelated.com: > http://www.dsprelated.com/groups/code-comp/1.php > > _____________________________________ > Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. > > _____________________________________ > About this discussion group: > > Archives: _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!

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