MCU-PLUS-SDK-AM243X: Am243X IPC example

Teja Poorna

Hello TI,

I would like to establish the communication between the R5F0 Core and M4F core on the AM243x SoC. Currently I have a launchpad and using the examples from the SDK "IPCNotify".

But I need to flash the cores for this and I am facing difficulty on how to do this? Could you please let me know the steps on how to flash and debug the example?

In my case, the program always stops at the following line

/* wait for all cores to be ready */
IpcNotify_syncAll(SystemP_WAIT_FOREVER);

please let me know, how to run this example.

Thanks & Regards

Teja

over 2 years ago

0 Aakash Kedia over 2 years ago

TI__Mastermind 26145 points

Hi Teja,

Please refer to the documentation that covers Flashing an Example - https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/08_04_00_17/exports/docs/api_guide_am243x/GETTING_STARTED_FLASH.html

Please refer to the example - https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/08_04_00_17/exports/docs/api_guide_am243x/EXAMPLES_DRIVERS_IPC_NOTIFY_ECHO.html

Note - This example should have all the mentioned cores at above link loaded for this to function properly.

Hope this helps.

Best Regards,
Aakash

0 Teja Poorna over 2 years ago in reply to Aakash Kedia

Prodigy 115 points

Hi Aakash,

Unfortunately, I am not successful after reading the documentation provided by you.

The following are the steps, I followed for flashing and executing the IPC_notify example

1) Import the example projects for both m4F core "m4fss0-0_nortos" and r5f core "r5fss0-0_freertos" to CCS.

2) Build both the projects and launch the target configurations for projects individually.

3) Initially I load the binary of the R5F core as shown below

4) After that I have loaded the binary of the M4F core

But there is no communication between the cores and I dont see any debug info.

Could you please tell us, how to run these examples and establish a communication between the two cores of the Am243x SoC.

if you have any document on how to load multiple binary files on the CPU, i.e. need to load more programs on other CPUs for the example to work as expected. Typically, this is needed for multi-core interprocessor communication (IPC) examples.

This would be great.

Thanks & Regards

Teja

+1 Aakash Kedia over 2 years ago in reply to Teja Poorna

TI__Mastermind 26145 points

Hi Teja Poorna,

Try importing the system freertos project. Build the same.

During build you will find all the CPUs i.e. mentioned in the table below are compiled and image generated.

r5fss0-0 freertos

r5fss0-1 nortos

r5fss1-0 nortos

r5fss1-1 nortos

m4fss0-0 nortos

You have to load and run all the CPUs for this example to work. You must load all the nortos images first and then load the freertos image. After loading is complete, run the nortos images first (no specific order) and then run the freertos image.

Note - This is because R50-0 initiates the communication and other CPUs are in polling mode, waiting to receive the msg provided. This type of loading is very example specific.

That is why to avoid synchronization problems with CCS load approach, I suggested you to load the *.appimage via OSPI boot. All the CPU image combined build will give you single *.appimage. Also the synchronization problems can also be avoided due to OSPI mode of boot.

Hope this helps.

Best Regards,
Aakash

0 Teja Poorna over 2 years ago in reply to Aakash Kedia

Prodigy 115 points

Hi Aakash,

Thanks a lot for the fast reply.

I was able to run the example program and it works.

Can we also dubug each core individually ? if yes, Please let me know.

Thanks & Regards

Teja

0 Aakash Kedia over 2 years ago in reply to Teja Poorna

TI__Mastermind 26145 points

Hi Teja,

For more details on multicore debugging refer to the following link - https://software-dl.ti.com/ccs/esd/documents/ccs_multi-core-debug.html#:~:text=options%20(see%20below)-,Debug%20Configurations,in%20the%20Debug%20view%20(Main)

If the image loading is not via CCS, and via OSPI then refer to the FAQ - https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1119575/faq-mcu-plus-sdk-am243x-how-to-debug-sbl_qspi-for-am263-and-am273-or-sbl_ospi-for-am243-or-an-application-which-is-booted-via-ospi-qspi-boot

Hope this helps.

Best Regards,
Aakash

0 AlexWalton42 over 2 years ago in reply to Aakash Kedia

TI__Expert 8555 points

Aakash Kedia, Teja Poorna,

I have a similar application where I'm also not using all of the cores. For my project, I setup the R5F_00 (main) and R5F_01 (remote) for IPC. I didn't use the system project because it doesn't work for my project due to the build steps. Here are the steps I took:

Imported ipc_notify_echo_am243x-evm_r5fss0-0_freertos_ti-arm-clang and ipc_notify_echo_am243x-evm_r5fss0-1_nortos_ti-arm-clang
Commented out the cores I'm not using in both ipc_notify_echo.c files:

Built both projects
Launched debug window
Grouped R5F_00 and R5F_01 together using the instructions in the "Grouping Cores" section here (group R5F_00 and M4 in your case)
Loaded R5F_00 and R5F_01 projects on corresponding cores
Selected "Group 1," then clicked run
Here was the terminal output:
- [IPC NOTIFY ECHO] Message exchange started by main core !!!
  [r5f0-1] 5.860023s : [IPC NOTIFY ECHO] Remote Core waiting for messages from main core ... !!!
  [IPC NOTIFY ECHO] All echoed messages received by main core from 1 remote cores !!!
  [IPC NOTIFY ECHO] Messages sent to each core = 1000000
  [IPC NOTIFY ECHO] Number of remote cores = 1
  All tests have passed!!
  [r5f0-1] 8.635969s : [IPC NOTIFY ECHO] Remote core has echoed all messages !!!

I hope this helps!

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MCU-PLUS-SDK-AM243X: Am243X IPC example