Require help on shared memory between ARM and DSP using CMEM

Rakesh Modi

Expert 1680 points

Hello,

I am trying to combine CMEM with ex02_messageq example. I want to transfer data to DSP by following method:

1) use cmem on linux side to share memory. Copy data to the reserved memory.

2) Pass physical address of cmem to DSP using messageq.

3) DSP will read the data and return back it to ARM

I have attached my source code here. Currenlty I am facing an issue that DSP is not reading data from the correct location. Could anybody please help me solve this problem?
test_cmem.tar.gz

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

This has been discussed on the forum. Check this thread: e2e.ti.com/.../503515

0 Rakesh Modi over 9 years ago in reply to Biser Gatchev-XID

Expert 1680 points

Hello Biser,

I have read the thread you have suggested and followed the same steps before posting question here. But it looks like there is some more modification require in resource table file, which may not mentioned in this thread. So could you please help me identify those modification? Please note that I am using SDKv2.0.2.11.

0 Garrett Ding over 9 years ago in reply to Rakesh Modi

TI__Mastermind 43296 points

Hi Rakesh,

The resource table modification is described here: processors.wiki.ti.com/.../IPC_Resource_customTable
The post e2e.ti.com/.../503515 actually well summarized the procedure to exchange data between ARM and DSP with IPC and CMEM.

Regards, Garrett

Processors

Processors forum

Require help on shared memory between ARM and DSP using CMEM