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Chunjian Li

Intellectual 680 points

Other Parts Discussed in Thread: SYSBIOS

Hi there,

I am trying to save some data in the DDR3 by inserting this line in my c file:

#pragma DATA_SECTION(s_mic_buff,".far:DataBlock");

I know that I should have something like this in the .cmd file too:

.far:DataBlock: load >> DDR3 align = 0x8

But I can't write it in the .cmd file because it is automatically generated. Where should configure this? I suppose it should be done in the RTSC Tools/Platform.

But there is no place to put this line there.

Any suggestion?

By the way, when I changed the settings in the Platform editor and save and build, I don't see any changes in the .cmd file, why is that?

I am using CCSv5, evmc6678l.

over 13 years ago

0 Chad Courtney over 13 years ago

TI__Mastermind 30825 points

Can you clarify if you're using an RTOS such as SYSBIOS, or just plain C code?

0 Varada Bellary over 13 years ago in reply to Chad Courtney

TI__Expert 5750 points

If you are using a RTSC project, then the memory sections information should configured in the project’s .cfg file. The linked command file will be generated based on this configuration.

Please refer "TI SYS/BIOS Real-time Operating System v6.x User’s Guide" , section 6.3.

Which platform file are your using ?

If you are using the default evm6678le platform file, where DDR3 is already defined, then below are the steps.

a. In your .cfg file, create a section block in DDR3 by the name 'MyDataBloc'

Program.sectMap[".far:MyDataBloc"] = {loadSegment: "DDR3", loadAlign: 8};

b. you can then place your data in this section :

#pragma DATA_SECTION(myProgBuf,".far:MyDataBloc");

There is another similar discussion that you may refer.

http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/t/163907.aspx

Hope this helps.

0 Chunjian Li over 13 years ago in reply to Varada Bellary

Intellectual 680 points

Thanks! That solved my problem.

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