topic Re: BDM Nexus2+ memory access does not work in FreeMASTER

BDM Nexus2+ memory access does not work

jobu — Wed, 29 Apr 2020 20:44:20 GMT

Dear all,

I try to use MPC5748G (silicon version 1N81M) with freemaster version 3.0.2.6 with option "BDM connection Nexus2+ memory access". I use PE micro Multilink Universal FX debugger. I can establish a proper connection to MPC5748G ("Test Connection" reports no problems). But all variables I'm watching returns 0. If I use option "background memory access" everything works as expected.

Whats wrong here?

Regards

Jörg

Re: BDM Nexus2+ memory access does not work

MichalH — Tue, 05 May 2020 08:57:03 GMT

Dear Jörg,

we are checking this failure internally. Please be patient.

Thank you,

Michal

Re: BDM Nexus2+ memory access does not work

MichalH — Thu, 07 May 2020 09:40:29 GMT

Dear Jorg,

my colleague has been able to connect to MPC5748G device using the Nexus2+ mode and he was able to read and write registers properly. His mask set is 0N78S though. I will try to find out if this could make any difference.

Anything new on your side?

Thanks,

Michal

Re: BDM Nexus2+ memory access does not work

MichalH — Thu, 07 May 2020 19:19:00 GMT

Hello Jorg,

we have done one more experiment with this evaluation board, and runtime memory access works well over Nexus2+. Is it possible for you to try it with another Power MCU or a different P&E debug probe?

Also, you can try to re-install the FreeMASTER 3.0.2 just to make sure the P&E Micro BDM plug-in is registered properly.

I'm sorry I have no better answer than "it works on our side"... but it is really the only one for now.

Best regards,

Michal

Re: BDM Nexus2+ memory access does not work

jobu — Thu, 07 May 2020 20:48:15 GMT

Dear Michal,

strange that it works at your side...

Forgotten to mention that I'm using DEVKIT-MPC5748G revision B and Multilink Universal FX debugger revision B.

What I habe done in the meantime :

I have installed freemaster on a different computer with the same result with FX debugger: all I'm watching returns 0.

I have also tried OpenSDA connection on both machines but unfortunately also with the same negative result.

Please give me the addresses of the values you have checked during your test. I will try the same on my side...

Regards

Jörg

Re: BDM Nexus2+ memory access does not work

lukaszadrapa — Mon, 11 May 2020 12:21:18 GMT

Hi Jorg,

let me jump into this thread. I used attached project for my test. It's empty default project, I just added global variable 'counter', which is incremented in endless loop.

I used USB Multilink Rev. A and Multilink Universal FX Rev. A. It's working with both versions on my side.

Regards,

Lukas

Re: BDM Nexus2+ memory access does not work

jobu — Tue, 12 May 2020 20:10:14 GMT

Hello Lukas,

thanks for sharing your project. I have done basicly the same test at my side. Nevertheless I have tested with your project but also with same result: variable stays at 0.

If have encountered the following:

I update Multilink firmware with PEFirmwareConfig tool to usbmlfxufjtagens.1018 (should be latest version).

If I connect to freemaster and test the connection to the targed the firmware is automatically updated from version 10.18 to 10.36.

But at the end of the update process 10.18 is shown as the new version.

I could not find a difference in firmware images comming from P&E update tool and the ones provided with freemaster installation. Why is the update started? Could there be somthing wrong with the firmware update? Can you see the same at your side?

The connection test shows this result:

Is BDM version 0.0 correct?

Regards

Jörg

Re: BDM Nexus2+ memory access does not work

MichalH — Wed, 13 May 2020 11:16:40 GMT

Hello Jörg,

when testing on our side, Lukas also sees BDM version 0.0, so I believe this is correct. The set of P&E firmware files included in FreeMASTER 3.0.2 has been provided by our partners in P&E directly, so I believe it is correct too.

The reason why you see intermediate update to 10.36 is most likely the update of Multilink bootloader (usbmlfxufbootens), later followed by update to Qoriva/PX firmware usbmlfsufjagens to version 10.18.

Just to be sure, you may use the official P&E updater (PEFirmwareConfig.exe) and remove all firmware images from c:\NXP\FreeMASTER 3.0\FreeMASTER\plugins\bdm to prevent any further update. But I do not think this is going to help.

Is it possible for you to test a different Multilink device?

Thank you,

Michal

Re: BDM Nexus2+ memory access does not work

jobu — Sat, 16 May 2020 15:45:54 GMT

Hello Michal,

I removed firmware images but this doesn't change the result. I have installed freemaster version 2.5 on a different machine but also doesn't work. What I have encountered is if I use Nexus2+ and test the connection I can see that the values sometimes changing and also the values are different from the ones which were displayed with background memory access. So I think that's the prove that there is something wrong reading out the values from the 5748G. I have also done a check with freemaster communication log, communication is without failures.

Is it possible to lower the JTAG frequency (via connect string?) just to do some further tests?

Unfortunately I don't have a second Multilink and no other board o give it a try.

Regards

Jörg

Re: BDM Nexus2+ memory access does not work

MichalH — Mon, 18 May 2020 09:02:13 GMT

Dear Jörg,

I have enabled the JTAG clock speed to be specified when Nexus2+ mode is selected. Please extract the plugin DLL from attached ZIP and replace the existing file in c:\NXP\FreeMASTER 3.0\FreeMASTER\plugins\bdm. The JTAG Clock Speed field should be editable in the new version. Specify value in kHz, it will be internally re-calculated to a divider value N in range 0..31 supported by P&E interfaces (Multilink, Cyclone and Lightning only)

For USB Multilink, the calculation is (the formula is different for Cyclone and Lightning):

N = (1000 / Clock_kHz) - 1

Clock_kHz = 1000 / (N+1)

In the old plugin version, the N was set to 2 for USB Multilink. So the JTAG clock was fixed at 333 kHz. I'm really curious if setting a lower values will help in your case.

Thanks,

Michal

Re: BDM Nexus2+ memory access does not work

jobu — Mon, 18 May 2020 19:26:09 GMT

Dear Michal,

unfortunately also this doesn't help.

So now I'm out of ideas for further investigations. I will buy a new board and give it a try. I let you know about the results, but this can take a while. Nevertheless thank you very much for your support...

Regards

Jörg

Re: BDM Nexus2+ memory access does not work

MichalH — Tue, 19 May 2020 13:38:43 GMT

OK Jörg. I'm sorry I could not help. Please let me know as soon as you test the new board.

I'd recommend to use the FreeMASTER over serial line which should work well.

Regards,

Michal

Re: BDM Nexus2+ memory access does not work

jobu — Mon, 14 Sep 2020 19:13:27 GMT

Dear Michal,

in the meantime I have bought a DEVKIT-MPC5748G latest revision. But same result doesn’t work.

So I have contacted PEmiro for help (see https://www.pemicro.com/forums/forum.cfm?forum_topic_id=7410). With ICDPPCNEXUS real-time view its working fine. As suggested by PEmicro could you please check which version of unit_ppcnexus.dll you have used for your tests…

Regards
Jörg

Re: BDM Nexus2+ memory access does not work

Enver — Thu, 17 Mar 2022 12:04:17 GMT

Dear Michal,

Did you solve this issue?

I have same problem.

Thanks in advance

Enver

Re: BDM Nexus2+ memory access does not work

MichalH — Thu, 17 Mar 2022 12:29:01 GMT

Hello Enver,

unfortunately not. Do you use the same target MCU and P&E Micro probe?

Regards,
Michal

Re: BDM Nexus2+ memory access does not work

Enver — Thu, 17 Mar 2022 12:33:44 GMT

Hello Michal,

I use MPC5775E-EVB board and Pemicro Universal Multilink-FX.

Best Regards.

Enver

Re: BDM Nexus2+ memory access does not work

MichalH — Thu, 17 Mar 2022 15:42:50 GMT

Hello Enver,

can you confirm you are using the latest FreeMASTER 3.1.3? Also, can you send me screenshots of your FreeMASTER - P&E plug-in Configuration dialog and a screenshot of a message which appears after pressing the Test Connection button in this dialog?

Do you also see an automatic firmware update of the P&E Micro interface when connecting with FreeMASTER - like Jobu had reported before?

Are the other symptoms same as Jobu had seen? (connection is established well, but variables read as 0). When you use Background Memory Access (stops core), do the variable values appear correctly?

Thanks,
Michal

Re: BDM Nexus2+ memory access does not work

Enver — Fri, 18 Mar 2022 06:59:51 GMT

Hello Michal,

I confirm that use lastest version:

I saw firmware update at first connection with MCU. Other times, I didn't see anytime after that. I guess firmware in multilink-fx is 10.81.

Use Nexus2+memory access, connection established well, but read as 0 all variables and board doesnt gave any response from freemaster button or current demand.

use Background Memory Access(stops core),connection established well,variable values are correct, but stops core is not avaible for our project(Electric Motor control).

Thanks in advance.

Regards.

Enver

Re: BDM Nexus2+ memory access does not work

MichalH — Mon, 21 Mar 2022 14:16:22 GMT

Hello Enver,

we were finally able to replicate the issue with the latest Multilink FX Rev.C. Older Multilink versions and also older Multilink FX versions seem to work well. Sometimes the clock is lowered to 100kHz - but from some reason this does not help with Rev.C.

We will try to reach out to P&E Micro for their assistance. Thank you for your patience.

Thank you,
Michal

Re: BDM Nexus2+ memory access does not work

jobu — Mon, 21 Mar 2022 20:52:16 GMT

Hello Michal,

I can't confirm that the older Multilink FX revisions are not affected. I have the issue with Multilink FX revision B.

Regards

Jörg