RTOS/AM5726: Shared memory configuration

Hello Maor,

I recommend taking a look at the IPC module. IPC allows for exchanging messages and data between cores.

Are you running Linux or TI-RTOS on the Arm core?

There is a messageQ example which demonstrates sending and receiving messages between the Arm and DSP using the client/server pattern, where the Arm is the client and the DSP is the server. The maximize size of the message can be 512 bytes.

If you need to send more than 512 bytes, I recommend referring to the big data ipc example. This example places buffers in shared memory and uses messageQ to share buffer information between cores.

Details on the big data ipc example can be found here:

For examples and training, please refer to the IPC sections of the Processor SDK Linux/RTOS SW Developer's Guides:

Linux:

TI-RTOS:

For an introductory training video to IPC, please see the following.

https://training.ti.com/intro-to-ipc-for-keystone-and-sitara?cu=519268

If you have any questions please let me know.

On the DSP, you can add a *.cfg file as well and then set the MAR bits like so,

var Cache = xdc.useModule('ti.sysbios.family.c66.Cache');
Cache.setMarMeta(BASE_ADDRESS, LENGTH, Cache.Mar_DISABLE);

An example .cfg file can be found at ~\ipc_3_50_03_05\examples\AM572X_bios_elf\ex02_messageq\dsp1\Dsp1.cfg