DM355-270Mhz changing PLL in ublDM355

Adrian Edmonds15805

Other Parts Discussed in Thread: TMS320DM355

Hi all;

I have been trying without success to change the ARM clock on our custom DM355 EVM derived board from 216 MHz to 270Mz. After some searching it seems the ubl, not u-boot and not the kernel and definitely not userspace is the place to do it. I added a define to device.h (#define DM355_270) to change the multiplier to 270MHz. The ubl builds but when flashed to the board does not start. No console output, nothing.

The chip is clearly marked 270 and our DVEVM chip is clearly marked 216. I'm reluctantly coming to the conclusion that this is not possible. Does anyone have any clues as to what I might try next?

Adrian Edmonds

over 15 years ago

0 Juan Gonzales over 15 years ago

TI__Mastermind 37340 points

do you have a "TMS320DM355-270 " part? If not, then programming to 270 will likely not work. If you do have this part, I can provide a prebuilt UBL to you. Also, how are you flashing UBL (serial utility or CCS)?

0 Adrian Edmonds15805 over 15 years ago in reply to Juan Gonzales

Prodigy 85 points

Yes. Very much so. I would love to have a prebuilt ubl and even more so what I was doing wrong. We're flashing using the Serial Boot and Flash Loading Utility from http://sourceforge.net/projects/dvflashutils/files/. Version 1.5. We're running under CentOS 4.0 using Mono 2.4.2. The prebuilt ubl works at 216 but nothing works when we change it to 270. Regards Adrian

0 Juan Gonzales over 15 years ago in reply to Adrian Edmonds15805

TI__Mastermind 37340 points

In order to comply with export-control compliance (laws), can you send me a request for pre-built DM355-270MHz UBL via www.ti.com/support addressed to myself (Juan Gonzales)?

By the way, the only changes required are to dm355Init.c of UBL, which was changed as below

PLL1->PLLM = 179; //( ARM )
PLL2->PLLM = 143; //( DDR )

0 Adrian Edmonds15805 over 15 years ago in reply to Juan Gonzales

Prodigy 85 points

Thanks Juan. I've done that. I'm intrigued by dm355Init.c. This doesn't appear to exist in http://sourceforge.net/projects/dvflashutils/files/DM35x_FlashAndBootUtils_1_50.tar.gz Guess I'm using the wrong source code for all this?

0 Juan Gonzales over 15 years ago in reply to Adrian Edmonds15805

TI__Mastermind 37340 points

mmm, not sure what UBL comes with the serial utility, but since this is not part of the official DVSDK software release, I am guessing it can fall out of date with our software releases. The safest best is to use the UBL source code included with DVSDK software release. For instance in DVSDK 2.0 this is under

.../dvsdk_2_00_00_22/PSP_02_00_00_140/board_utilities/dm355

and it has the dm355init.c file I referred to.

0 Adrian Edmonds15805 over 15 years ago in reply to Juan Gonzales

Prodigy 85 points

OK, found it. Still would like the pre built binary though.

0 Juan Gonzales over 15 years ago in reply to Adrian Edmonds15805

TI__Mastermind 37340 points

Adrian Edmonds said:

OK, found it. Still would like the pre built binary though.

Did you send your request thru www.ti.com/suppot ? If so, do you have a service request # (SR- #); this will help me find it in the system.

0 Adrian Edmonds15805 over 15 years ago in reply to Juan Gonzales

Prodigy 85 points

Yes. It's 1-633812211. However, (take a deep breath).

My contract on this project finished yesterday.

We did get a pre built ubl binary from a local TI source supposedly for 270MHz. When we flashed our system with it , it didn't start.

We can't build the ubl provided with the SDK as it requires Code Composer running on Windows. CC doesn't like Vista.

Returning to the ubl provided with the serial flashing ulility I tried one last thing before I left the building for the last time. I changed the clock speed from 216 to 222 which worked. Any further attempts to increase the speed failed. I suspect a hardware timing problem but this is not popular with the hardware team.

That's about it. Thanks anyway.

0 Juan Gonzales over 15 years ago in reply to Adrian Edmonds15805

TI__Mastermind 37340 points

Sorry to hear about your contract. This is interesting, if 222 worked, then the UBL you were building all along is likely good. This may have been a limitation on the silicon. Are you certain you were using a 270 MHz rated part; I have heard these are hard to come by. DM365 is supposed to provide an alternative solution in such situations.

0 Adrian Edmonds15805 over 15 years ago in reply to Juan Gonzales

Prodigy 85 points

A picture is worth a thousand words. This is a recursive image. We used the DM355 and our camera to photo itself.

0 Pierre19548 over 15 years ago in reply to Juan Gonzales

Prodigy 150 points

Hi,

We are using the TMS320DM355 in the 270Mhz version on our custom board.

We are flashing UBL using serial flasher utility but for the moment we only have the 216Mhz version of UBL. Is it possible to have the version of the UBL that you are talking about ?

Thank you for your help

0 Juan Gonzales over 15 years ago in reply to Pierre19548

TI__Mastermind 37340 points

If you want a pre-built binary, you have to send a request thru www.ti.com/support and address it to me (Juan Gonzales). A link to this post will also be helpful.

As suggested above, due to export compliance laws, we cannot post the source code.

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DM355-270Mhz changing PLL in ublDM355