Cannot connected to DSP core when ARM is running in Linux

Peter010

Hello

I am using K2H EVM. ARM cores are running in the Linux from the Processor SDK Linux v2.00.02.11. The boot mode of EVM is "Uboot mode". Under this condition, I want to use CCS to debug program on C66x DSP cores. According to this website(link here), I need to set up environment variable "debug_optiones" in the uboot. However, after this setting, CCS still cannot connect to the DSP cores due to the reason of "C66xx_0: Error connecting to the target: (Error -1180 @ 0x0) Device is held in reset. Take the device out of reset, and retry the operation. (Emulation package 6.0.228.0)"

After I change the boot mode to the "No Boot", CCS can successfully connect to the DSP cores.

So, can you tell me how to use CCS connect to the DSP core when ARM is running in the Linux?

Thanks in advance.

Xining Yu

over 7 years ago

0 Titusrathinaraj Stalin over 7 years ago

TI__Guru** 116100 points

Dear Xining Yu,
You need to insert the remoteproc drivers in Linux.
Or, you can run the IPC demo code through Matrix application and try to connect the DSP core from CCS.
That application would wakeup all the DSP cores.

PS:Don't call the gel file.
Create a dummy target config for K2H without using gel file in ARM & DSP core as its already enabled by Linux ARM.

0 Peter010 over 7 years ago in reply to Titusrathinaraj Stalin

Genius 4165 points

Thanks for your replying Titus S.

I had successfully connected to DSP by using CCS after running IPC demo.

I have another question. Can I manually load the remoteproc module driver? If so, can you help me how to do that ?

Thanks

Xining Yu

0 Titusrathinaraj Stalin over 7 years ago in reply to Peter010

TI__Guru** 116100 points

In latest processor SDK Linux rootfs, the driver will be loaded automatically through udev.
You can see that while booting Linux (udev initializing time)

You can also insert the driver manually.
insmod <*.ko>

0 Peter010 over 7 years ago in reply to Titusrathinaraj Stalin

Genius 4165 points

Hi Titus S.

Thanks for your clarification.

Just like you said, I can find the remoteproc is loaded when udev is loaded.

Question 1: is there a method that I can make the successful connection between DSP and CCS without running IPC demo at first? If so, can you tell me how to do that?

Question 2: without loading *.gel in the target configuration file in the CCS, do I need to initialize DSP core in my own codes (like core clock, L1/L2 cache size), or ARM cores already did that?

Thanks
Xining Yu

0 Titusrathinaraj Stalin over 7 years ago in reply to Peter010

TI__Guru** 116100 points

Dear Xining Yu,

Question 1: is there a method that I can make the successful connection between DSP and CCS without running IPC demo at first? If so, can you tell me how to do that?

Yes, we do have the method to do so, I forgot that, let me check internal team on this.

Question 2: without loading *.gel in the target configuration file in the CCS, do I need to initialize DSP core in my own codes (like core clock, L1/L2 cache size), or ARM cores already did that?

Yes, you need to do those DSP stuff in DSP code (but not peripherals as its shared between ARM & DSP)

0 Titusrathinaraj Stalin over 7 years ago in reply to Peter010

TI__Guru** 116100 points

Please refer to this wiki page.
processors.wiki.ti.com/.../Taking_the_C66x_Out_Of_Reset_with_Linux_Running_on_the_ARM_A15

Let me know if any issues.

0 Peter010 over 7 years ago in reply to Titusrathinaraj Stalin

Genius 4165 points

Thanks for your help.

Xining

0 Titusrathinaraj Stalin over 7 years ago in reply to Peter010

TI__Guru** 116100 points

Sounds good.
Thanks for the update.
Please let us for any problem or questions.

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Cannot connected to DSP core when ARM is running in Linux