Shared memory access

manju krishnan

Hello everyone...

I'm using TDA3xx and VisionSDK ...

I'am trying to use shared memory, I allocated the memory using Utils_memAlloc and heap id=UTILS_HEADID_DDR_NON_CACHED_SR0. When I'am using that pointer in DSP I'am getting an error:

undefined first referenced
symbol in file
--------- ----------------

error: unresolved symbols remain

error: errors encountered during linking;
"/home/../vision_sdk/binaries/vision_sdk/bin/tda3xx-evm/vi
sion_sdk_c66xdsp_1_release.xe66" not built
make[4]: *** [/home/../vision_sdk/binaries/vision_sdk/bin/tda3xx-evm/vision_sdk_c66xdsp_1_release.xe66] Error 1

Is there any specific file where I need to make changes??

what should I do so as to be able to access that memory location in DSP.

Thanks in advance...

over 9 years ago

0 Yogesh Marathe over 9 years ago

TI__Expert 7765 points

Your dsp executable is not yet built completely, please build without -s -j option to see which symbol linker is failing for.

0 manju krishnan over 9 years ago in reply to Yogesh Marathe

Prodigy 70 points

I'am not exactly sure what u meant by symbol linker....

"ptest_shared /home/../vision_sdk/binaries/lib/tda3xx-evm/66/release/vision_sdk_alg_plugins.ae66<dctLfmStage1Link_algPlugin.oe66>"

dctLfmStage1Link_algPlugin.c is the file in which i need to access the shared memory and ptest_shared is the pointer to the shared memory which i need to use.
after allocating the memory i also used extern in dctLfmStage1Link_algPlugin.c

0 manju krishnan over 9 years ago in reply to manju krishnan

Prodigy 70 points

Is there any example in VisionSDK where data from shared memory is used by two cores??

0 Yogesh Marathe over 9 years ago in reply to manju krishnan

TI__Expert 7765 points

All examples use shared memory.

Processors

Processors forum

Shared memory access