AM5748: IPC communication between cores

Hello Anila,

I believe this is the same issue as this thread: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1289449/am5748-ipc-between-m4-core-and-dsp-not-working-without-linux-running-in-the-host

correct?

-Josue

Hello Josue,

Yes, the task_create() issue which was mentioned previously is solved. But the messageQ functions are not working consistently even after adding some delays.

Anila,

I will be working on this subject this week. I will get back to you by the end of the week if not sooner on my testing.
-Josue

Hello Josue,

Yes please, this task is on high priority for me. Please let me know if there is any progress.

Thanks,
Anila

Hello Anila,

Could you please share any error logs?

I am currently working on other priorities so my work in reproducing this issue will be pretty slow.

We have seen some issues with utilizing IPU2 on AM57x, as seen here and the development team is still looking into the issue.

-Josue

Hello Josue,

The error that i was getting  as mentioned before was opening the MessageQ of IPU2 from the DSP1. This is error log that i received for IPC between DSP and IPU2 and the issue was same for the Ipc between HOST and IPU2. But i load the binary in the IPU1 Core with the config.bld file based on IPU1 even then the MessageQ function wasn't working properly and stop at MessageQ from the IPU core. 

Thanks,

Anila

Thank you for the log.

Hello Josue,

Is there any progress with the IPC communication as we are working on this task on high priority basis.

Thanks,

Anila

Hello Anila, 

I have not had a chance to due to other priorities. I will give you an update on my status by the end of the week.
Please continue to leverage the documentation and previous forum questions.

I know that you are not using Linux but it might perhaps help to look into changes that were done on the newer release.

You can see the IPC git tree on https://git.ti.com/cgit/ipc/ipcdev/tag/?h=3.51.00.00A
This is the corresponding IPC version with the latest kernel.

A couple of threads that incorporated some changes that helped:

• https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1272434/am5748-remoteproc-allocation-of-large-carveout-fails/4850787#4850787 (10th response from Suman)
• https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1283168/am5728---ipc-rpmessage_send-failed-vring-description-address-not-consistent-when-annouce-messageq-service-to-the-host

This might not apply since I don't believe you need a resource table in SYSBIOS only IPC.

-Josue

Hello Josue,

Please let me know if there is any progress as there are many dependencies on this activity and we are lagging with this activity.

Thanks,

Anila

Anila,

Understood.

Please continue to leverage the documentation and previous forum question.

software-dl.ti.com/.../index_Foundational_Components.html

-Josue

Hello,

For the IPC between the M4 core and A15 core, I am finding DataAbort issue from the A15 core at the messageQ_get function. I tried changing the cfg file and config.bld file but that didn't help.There is no memory map for the host available in the sdk(processor_sdk_rtos_am57xx_08_01_00_09).Can you please help me with the changes that are to be made in the provided code for the A15 and M4 for the proper functioning of MessageQ functions.

UART_BasicExample_idkAM574x_armExampleProject.zip

UART_BasicExample_idkAM574x_m4Exampleproject.zip

Error that is received:

ERROR: "(unknown file)", line 205: E_dataAbort: pc = 0x8b015e94, lr = 0x8b002f88.

Anila,

I have not had time to look into this, I have other priorities that are taking precedence.

I will update you by the end of the week.

-Josue

The inconsitence between the core are still there. Can you please share how to do memory map in the a15 core for the config.bld file.

Anila,

You can find information here: https://software-dl.ti.com/processor-sdk-rtos/esd/AM57X/08_01_00_09/exports/docs/rtos/index_how_to_guides.html?highlight=memory%20map#ti-rtos-platform-configuration
 As well as this older wiki that explains config.bld files: Config bld basics - Texas Instruments Wiki.pdf

-Josue

Hello,

The existing examples for the IPC is present for the DSP and A15 cores in the ipc directory of processor sdk package. Can you share a example project for the IPC between DSP,M4 and Host working on SYS/BIOS without Linux running on the Host. As with the changes in this existing project the Queue is not getting opened from the Host side.

-Anila

Hi Anila,

Please look into the examples given in this repository:

https://git.ti.com/cgit/ipc/ipc-examples/tree/src/examples/templates

-Josue

Hello,

For the IPC between the M4(ipu2) and A15,I created a project from the example projects available in the IPC package(ex02_messageq) of SDK by using the dsp code base for the m4.And for the config file used the .cfg file of the ipu2 from the  DRA7XX_bios_elf from the ex11_ping package.But the code is getting stopped at the messageQ_get from the M4 side.This the workspace of the project.Please do help me in solving this issue.

ipc_dsp_ipu2.rar

-ANila

Anila,

I am still ramping on this. It seems like there is no examples of the A-core being used as host in BOIS<->BIOS context. The examples were made with Linux being expected to be the A-core OS.

-Josue