C6474 NDK data transfer

Johnny Kim

Intellectual 330 points

Other Parts Discussed in Thread: BIOSLINUXMCSDK

Hi.

My develoment platform is below.

DSP: C6474 1GHz

DDR2: 512MB

BIOS: 5.4

NDK: 2.0

CSL: 3.0.3

CCS: 3.3

When I transfer NDK data to DDR2 with writen below command I've got problem network stack is not working.

============================================================================================================

SECTIONS

{

.far:NDK_PACKETMEM {} align=128 > DDR2

.far:NDK_MMBUFFER {} align=128 >DDR2

.far:NDK_OBJMEM {} align=128 > DDR2

}

============================================================================================================

Is there any software version conflict in my development environment, or any other problem for this command.

Additionally, after boot NDK, first ping is working, but after stay for several time when I send ping, dosen't response. Is there anyone have same problem ?

over 13 years ago

0 ArunMani over 13 years ago

TI__Genius 9915 points

The NDK is primamry built with the assumption that all the sections are loaded to the L2. So in order to use DDR for the section compile the code with EXTERNAL_MEMORY flag. Also you are using one of the oldest versions of everything. If possible move the MCSDK 1.0.0.8 which is available in the link below:

http://www.ti.com/tool/bioslinuxmcsdk

Thanks,

Arun.

0 Johnny Kim over 13 years ago in reply to ArunMani

Intellectual 330 points

Hi Arun.

Thanks for your reply.

Would you more explain how to transfer data to DDR, can you support example code.

Thanks & Regards.

Johnny.

0 Johnny Kim over 13 years ago in reply to Johnny Kim

Intellectual 330 points

Anyone, pls help for figuring out this problem.

0 ArunMani over 13 years ago in reply to Johnny Kim

TI__Genius 9915 points

Sorry for the delay. Can you check it in the mcsdk. I don't have a copy. let me download and let you know which one to be exact. Are you running a multicore programming. if it is not then the transfer is same as data moving in and out of L2. only if you are accessing across multiple cores, you need to validate the cache before using it in the other core.

Thanks,

Arun.

0 Johnny Kim over 13 years ago in reply to ArunMani

Intellectual 330 points

Hi Arun.

Platform is not used below software omponent version instead of MCSDK package.

BIOS: 5.4

NDK: 2.0

CSL: 3.0.3

CCS: 3.3

Dose not this data transfer command support in old component version, if yes, is there the document about version history.

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C6474 NDK data transfer