Linux/AM5728: Compiling the CMEM test application

netrover

Part Number: AM5728

Tool/software: Linux

We are trying to compile and execute a known working Linux-DSP-RTOS Multicore application where the Linux application and the DSP RTOS companion application both utilize the CMEM library to share large size buffers. We saw there is a GateMPApp, which seems to have companions for Linux and DSP RTOS, see below.

/home/user01/ti/ipc_3_44_00_00/linux/src/tests/GetMPApp.c - the Linux side application

/home/user01/ti/ipc_3_44_00_00/packages/ti/ipc/tests/gatempapp.c - the RTOS side application for the DSP

We are having trouble getting the GateMPApp to compile using the Linux RT processor SDK environment targeted for the AM572x IDK EVM. This includes compiling for the Linux GateMPApp.c and the RTOS associated gatempapp.c TI RTOS DSP programs. The issue seems to be the Makefile is not attempting to compile these source files. There appears to be some environment variables or compiler variables that need to be defined based on below excerpt from Makefile.am in /home/user01/ti/ipc_3_44_00_00/linux/src/tests, such as CMEM and DRA7XX,

if DRA7XX
# Add platform specific bin application's here
bin_PROGRAMS +=
if CMEM
bin_PROGRAMS += GateMPApp
endif
if KDIR
if DRM
bin_PROGRAMS += mmrpc_test
endif
endif
else

... etc

The default apps compile fine, such as MessageQApp. How do we compile GateMPApp?

Also, are there other examples that compile more easily that show how to share large buffers between Linux and RTOS?

Thanks

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

The software team have been notified. They will respond here.

0 Garrett Ding over 8 years ago

TI__Mastermind 43296 points

Hi netrover,

You can follow the instructions here

to update products.mak and build the GateMPApp.

The thread () may help you create your own CMEM application as well.

Regards,

Garrett

0 netrover over 8 years ago in reply to Garrett Ding

Intellectual 850 points

Thanks Garrett,

We are going through your post above.

I am looking at the CMEM API embedded in the ti-processor-sdk-linux-rt-am57xx-evm-03.02.00.05 directory structure. In the directory,

/opt/ti/ti-processor-sdk-linux-rt-am57xx-evm-03.02.00.05/board-support/extra-drivers/cmem-mod-4.12.00.00+gitAUTOINC+d6d3e84c84/

It looks like the API library is not pre-compiled in the kit or in another location? I will try to compile it.
Thanks

0 Garrett Ding over 8 years ago in reply to netrover

TI__Mastermind 43296 points

Netrover,

You are right - CMEM is not pre-compiled in the kit.
You can clone the CMEM from its repo here: http://git.ti.com/ipc/ludev, see processors.wiki.ti.com/.../CMEM_Overview

Regards,
Garrett

0 netrover over 8 years ago in reply to Garrett Ding

Intellectual 850 points

I tried the example in the thread. The app_host does a core dump after the following messages.

-----------------------------------------------------------------------------------
root@am57xx-evm:~/tests/cmemhost# ./app_host DSP1
--> main:
--> Main_main:
--> App_create:
CMEM_init success
MessageQ_Params_init
MessageQ_create
app_host: ../../../hlos_common/src/utils/MultiProc.c:79: MultiProc_getName: Assertion `id < _MultiProc_cfg.numProcessors' failed.
Aborted (core dumped)
-----------------------------------------------------------------------------------

Any ideas?
Thanks

0 netrover over 8 years ago in reply to netrover

Intellectual 850 points

Ok,

I fixed the MultiProc_getName error, which appears to be because I linked with the .a libraries instead of the .so libraries for tiipc, tiipcutils, and titransportrpmsg.

The example posted, bitbucket.org/.../cmem.git, works when I replace the original 'ex02_messageq' with that and compile for only host and DSP1 at the moment. I used the top level make 'ti-ipc' in the 'ti-processor-sdk-linux-rt-am57xx-evm-03.02.00.05' to update the '.../ipc_3_44_00_00/examples' for 'ex02_messageq'.

Now I have a running CMEM example that I can work with and learn how to use the cmemk.ko module to reserve memory or the device tree method.

Thanks for the help!

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Linux/AM5728: Compiling the CMEM test application