AM5728: passing data to \ from DSP

Ilan Ganor

Prodigy 180 points

Part Number: AM5728

Tool/software:

ussing this bundle:

RTOS: www.ti.com/.../06.03.00.106

LINUX: https://www.ti.com/tool/download/PROCESSOR-SDK-LINUX-AM57X/06.03.00.106

I managed to fully utilize big data IPC, pass data from host to dsp1, change the data on dsp1 , and return the data to host

using morerecent SDK 08_02_01_00, I seen big data IPC example was removed, I tried to use simple IPC for sending data , I managed to get back to host the exact data I sent, but any attempt to change the data on DSP side failed

please clarify the following:

1. why it has stopped working ?

2. bg data ipc example removed, I managed to compile it on SDK 08_02_01_00 but it crashes...

seems like the ability to pass data from HOST to DSP< change data on dsp and return to host is no longer supported, which is surprising since it's the main motivation for using this chip

please if supported, provide a clear full example on how to support that with

ti-processor-sdk-linux-am57xx-evm-08_02_01_00
processor_sdk_rtos_am57xx_08_01_00_09

any method is fine by me, shared memory, bigdata IPC etc...

over 1 year ago

0 Josue Zamitiz-Ayala over 1 year ago

TI__Mastermind 31424 points

Hello Ilan,

Yes, It is correct. The big data example is not supported in SDKs past 6.3. I believe the reason has to do with CMEM being deprecated: see https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1317414/processor-sdk-am57x-support-for-cmem.

At this time we do not have an example of how to do this in later SDKs.

-Josue

0 Ilan Ganor over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 180 points

this is quite crazy situation
now since cmem is not supprted, we need to use dma_buf_phys
in order to use a very basic functionality, the user needs to add those drivers to linux kernel, modify DTS , rebuild and use updated example.

this makes the most comon action with this processor to be "out of reach" fr most people

so really seams that this feature is supported well only until lversions:

RTOS: www.ti.com/.../06.03.00.106

LINUX: https://www.ti.com/tool/download/PROCESSOR-SDK-LINUX-AM57X/06.03.00.106

after that it's realy unusable (most users will require too much work and research to integrate in kernel level the support for dma_buf_phys)

+1 Josue Zamitiz-Ayala over 1 year ago in reply to Ilan Ganor

TI__Mastermind 31424 points

Ilan,

I understand the frustration. Your feedback is taken and we will confer with our development team in order to rectify the situation.

Thank you.

-Josue

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AM5728: passing data to \ from DSP