AM5748: DSP Programming

Arun Krishnan

Prodigy 140 points

Part Number: AM5748
Other Parts Discussed in Thread: AM5728

Hi,

I have a AM5748 based SOM. I need to use DSP to communicate with an ADC via SPI and also UART.

I need to load this application via A15 core running on Linux from the user space.

What are the steps I should follow to enable this?

While going through the processor SDK rtos https://software-dl.ti.com/processor-sdk-rtos/esd/docs/latest/rtos/index_examples_demos.html#dsp-c66x

Can I use this hello world example as a starting point and building on this?

10.2.1.1.2.5.2. Timer Suspend Control Options for DS Phttps://software-dl.ti.com/processor-sdk-rtos/esd/docs/latest/rtos/index_how_to_guides.html#timer-suspend-control-options-for-dsp

How can I enable this script? Which GEL file should I use?

over 1 year ago

0 Josue Zamitiz-Ayala over 1 year ago

TI__Mastermind 34866 points

Hello Arun,

If you are using Linux, you should avoid utilizing Gel files since it will have SW conflicts and things will not work out well.

Please read the following section https://software-dl.ti.com/processor-sdk-linux/esd/AM57X/08_02_01_00/exports/docs/linux/Foundational_Components_IPC.html.

Please also see: https://software-dl.ti.com/processor-sdk-rtos/esd/AM57X/08_01_00_09/exports/docs/rtos/index_how_to_guides.html#run-ipc-examples-on-am572x

This should get you started.

Best,

Josue

0 Arun Krishnan over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 140 points

Hello Josue,

Thanks for the reply.

How I should proceed with if I am using Linux? Creating a symbolic link under /lib/firmware and then unbind, bind?

I may need to use the CCS debugging for DSP development? In such cases, I may have to use the GEL files, right?

Coming to the previous regarding to the timer control suspend options? How to enable the script GPTimer Suspend Source?

PS: I am using SDK version 06_03_00_106

Regards,

Arun

0 Josue Zamitiz-Ayala over 1 year ago in reply to Arun Krishnan

TI__Mastermind 34866 points

Hello Arun,

Arun Krishnan said:
How I should proceed with if I am using Linux? Creating a symbolic link under /lib/firmware and then unbind, bind?

Yes, that is the way you get Linux to load the firmware for the DSP. There are example projects on the page linked above including a video.

Arun Krishnan said:
I may need to use the CCS debugging for DSP development? In such cases, I may have to use the GEL files, right?

You can also use CCS with Linux and debug the DSP code. You could also use the GEL files if you needed to debug independent of Linux. The caveat here is that you cant use both at the same time.

Arun Krishnan said:
I may need to use the CCS debugging for DSP development? In such cases, I may have to use the GEL files, right?

Coming to the previous regarding to the timer control suspend options? How to enable the script GPTimer Suspend Source?

I believe you select it from the drop down menu as shown in the picture.

Best,

Josue

0 Arun Krishnan over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 140 points

Hello Josue,

Thank you for the reply.

Josue Zamitiz-Ayala said:
I believe you select it from the drop down menu as shown in the picture.

How to enable this in the dropdown menu in scripts. I was having the impression that we need to have the appropriate GEL for doing this.

As you can see below, My scripts dropdown is empty.

How to enable the scripts?

0 Josue Zamitiz-Ayala over 1 year ago in reply to Arun Krishnan

TI__Mastermind 34866 points

Hello Arun,

My apologies I did not fully understand your initial query. Yes, in order to have the scripts, one usually needs to load up a .GEL file for them to be available. After looking at a couple of the CCS versions, I did not find a GEL file that had this specific utility.

I will have to investigate this internally. Please give me some time to look into this.

Chances are, this functionality was removed and the documentation was not updated.

Best,

Josue

0 Arun Krishnan over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 140 points

Thank you for the reply.

Waiting for the update from your side.

0 Josue Zamitiz-Ayala over 1 year ago in reply to Arun Krishnan

TI__Mastermind 34866 points

Hello Arun,

I have been unable to find this so far, still waiting for confirmation from other sources internally but this is more than likely not supported anymore.

Best,

Josue

0 Arun Krishnan over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 140 points

Hello Josue,

Thank you for the reply.

While trying to connect to the A15_0 core via JTAG, I am able to connect.

But while using the \ti\ccs1010\ccs\ccs_base\emulation\boards\am572x\gel\AM572x_multicore_reset.gel file to AM572x_MULTICORE_EnableAllCores, its not working. So I am unable to connect to the other cores.

Regards,

Arun

0 Josue Zamitiz-Ayala over 1 year ago in reply to Arun Krishnan

TI__Mastermind 34866 points

Hello Arun,

Are you running Linux simultaneously?

Best,

Josue

0 Arun Krishnan over 1 year ago in reply to Josue Zamitiz-Ayala

Prodigy 140 points

Hello Josue,

Yes, I was running Linux, when I tried to connect to the A15 and DSP cores.

Regards,

Arun

0 Josue Zamitiz-Ayala over 1 year ago in reply to Arun Krishnan

TI__Mastermind 34866 points

Arun,

As mentioned in my first reply, when running one piece of SW on the A15 core and then running a GEL script is not recommended since these will conflict with each other.

That being said, I think the procedure to connect to the cores is in the documentation.

I was able to connect to the DSP core doing the following procedure:

Connect to the processor using the SoC Target Configuration, in my case it is AM5728, you would do AM5748.
Right-click on the cores and pick show all cores
This will bring up the Non-Debuggable Devices section. Right click and connect the CS_DAP_Debug_SS core.
Go to Tools>GEL files and load the multi core reset GEL
You can do this by right-clicking in the window under scripts for the Gel file window --> Load GEL...
You will see a success message
Then you choose the right core to initialise: Scripts>AM572x_MULTICORE_Initialization>DSPxSSClockEnable_API
After this you should be able to connect to the core.

I hope this helps! I apologize for the other script, if it is no longer within CCS files than I doubt it is supported anymore.

Best,

Josue

Processors

Processors forum

AM5748: DSP Programming