Debugging U-Boot standalone apps on Tegra 2 board
Hi
I'm currently running U-Boot on the Tegra2 Harmony board and I'd appreciate some help on how to debug U-Boot standalone applications. I'm currently stuck with some nasty bugs and without a debugger it will be extremely painful to fix them.
I read that using a JTAG device seems to be the best option. According to the technical specs of the Harmony board, JTAG is supported and looking at the board, there's apparently a debug port (J10). However, this port looks too tiny to be a regular JTAG interface.
Do you have any idea if a JTAG debugger is indeed supported? If so, could you please recommend me one that is compatible with this board? Otherwise, are you aware of an alternative approach for debugging the system?
I really appreciate your help on this. Thanks in advance.
Regards,
--Nuno
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Quoted 12 lines · Nuno Santos
Hi
I'm currently running U-Boot on the Tegra2 Harmony board and I'd appreciate some help on how to debug U-Boot standalone applications. I'm currently stuck with some nasty bugs and without a debugger it will be extremely painful to fix them.
I read that using a JTAG device seems to be the best option. According to the technical specs of the Harmony board, JTAG is supported and looking at the board, there's apparently a debug port (J10). However, this port looks too tiny to be a regular JTAG interface.
Quoted 6 lines
Do you have any idea if a JTAG debugger is indeed supported? If so, could you please recommend me one that is compatible with this board? Otherwise, are you aware of an alternative approach for debugging the system?
I really appreciate your help on this. Thanks in advance.
I've CC'd a couple of people more involved in U-Boot and JTAG debugging. For Harmony, I believe you need an external debug board to expose the JTAG connector in a standard form-factor. I don't know if these are available; it's probably best to ask whoever you got your Harmony from.
A message that is not in the archive (sent off-list or not yet received): [email protected]
The main Harmony PC board (1162) connects via ribbon cable to a debug board (1137) w/20-pin JTAG, RS-232 serial port, etc. if I remember correctly (haven't touched my Harmony in a long time).
Once you have the debug board, any JTAG dongle will connect - we use the Flyswatter from TinCanTools, and/or the parallel-port JTAG adapters, as well as the Lauterbach.
As Stephen says - whoever gave you the Harmony originally should be able to help you get the debug board to go with it.
HTH,
Tom
Quoted 31 lines
-----Original Message-----
From: Stephen Warren [mailto:[email protected]]
Sent: Thursday, August 23, 2012 10:41 AM
To: Nuno Santos; Tom Warren; Allen Martin
Cc: [email protected]
Subject: Re: Debugging U-Boot standalone apps on Tegra 2 boardQuoted 12 lines · Nuno Santos
Hi
I'm currently running U-Boot on the Tegra2 Harmony board and I'd appreciate some help on how to debug U-Boot standalone applications. I'm currently stuck with some nasty bugs and without a debugger it will be extremely painful to fix them.
I read that using a JTAG device seems to be the best option. According to the technical specs of the Harmony board, JTAG is supported and looking at the board, there's apparently a debug port (J10). However, this port looks too tiny to be a regular JTAG interface.
Quoted 6 lines
Do you have any idea if a JTAG debugger is indeed supported? If so, could you please recommend me one that is compatible with this board? Otherwise, are you aware of an alternative approach for debugging the system?
I really appreciate your help on this. Thanks in advance.
I've CC'd a couple of people more involved in U-Boot and JTAG debugging. For Harmony, I believe you need an external debug board to expose the JTAG connector in a standard form-factor. I don't know if these are available; it's probably best to ask whoever you got your Harmony from.
A message that is not in the archive (sent off-list or not yet received): 5FBF8E85CA34454794F0F7ECBA79798F379DE7253E-wAPRp6hVlRhDw2glCA4ptUEOCMrvLtNR@public.gmane.org
Hi Tom,
You happen to mention a very sore subject for me Flyswatter and Harmony, so now that we are on the subject I would like to ask you a couple of questions :-)
What software do you use with Flyswatter? Is is OpenOCD? If so what are the board files that you use and would it be possible for you to share them? The reason I ask is because three month ago or so I tried to use the aforementioned combo as a JTAG debugger on my Harmony board(with intent to use it on our Harmony based design later) and I failed miserably.
I do have Lauterbach, but the experience of trying to make it work(and failing to do so) made me decide not to use that wunderwaffe ever again, unless my parents are being held hostage or something.
Quoted 45 lines · Tom Warren
The main Harmony PC board (1162) connects via ribbon cable to a debug board (1137) w/20-pin JTAG, RS-232 serial port, etc. if I remember correctly (haven't touched my Harmony in a long time).
Once you have the debug board, any JTAG dongle will connect - we use the Flyswatter from TinCanTools, and/or the parallel-port JTAG adapters, as well as the Lauterbach.
As Stephen says - whoever gave you the Harmony originally should be able to help you get the debug board to go with it.
HTH,
Tom
Quoted 25 lines
-----Original Message-----
From: Stephen Warren [mailto:[email protected]]
Sent: Thursday, August 23, 2012 10:41 AM
To: Nuno Santos; Tom Warren; Allen Martin
Cc: [email protected]
Subject: Re: Debugging U-Boot standalone apps on Tegra 2 boardQuoted 17 lines · Nuno Santos
Hi
I'm currently running U-Boot on the Tegra2 Harmony board and I'd appreciate some help on how to debug U-Boot standalone applications. I'm currently stuck with some nasty bugs and without a debugger it will be extremely painful to fix them.
I read that using a JTAG device seems to be the best option. According to the technical specs of the Harmony board, JTAG is supported and looking at the board, there's apparently a debug port (J10). However, this port looks too tiny to be a regular JTAG interface.
Do you have any idea if a JTAG debugger is indeed supported? If so, could you please recommend me one that is compatible with this board? Otherwise, are you aware of an alternative approach for debugging the system?
Quoted 5 lines
Quoted 1 line
I really appreciate your help on this. Thanks in advance.
I've CC'd a couple of people more involved in U-Boot and JTAG debugging. For Harmony, I believe you need an external debug board to expose the JTAG connector in a standard form-factor. I don't know if these are available; it's probably best to ask whoever you got your Harmony from.
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A message that is not in the archive (sent off-list or not yet received): 5037A0E8.9080209-MC3rjLPHZ0ivD/[email protected]
Quoted 11 lines · On 08/24/2012 09:42 AM, andrey.smirnov-MC3rjLPHZ0ivD/XHwUtZZ+TW4wlIGRCZ@public.…
Hi Tom,
You happen to mention a very sore subject for me Flyswatter and Harmony, so now that we are on the subject I would like to ask you a couple of questions :-)
What software do you use with Flyswatter? Is is OpenOCD? If so what are the board files that you use and would it be possible for you to share them? The reason I ask is because three month ago or so I tried to use the aforementioned combo as a JTAG debugger on my Harmony board(with intent to use it on our Harmony based design later) and I failed miserably.
I have a FlySwatter 2 and used it with some random git version of OpenOCD quite a while ago. This worked somewhat on our Springbank board, although there were some stability issues, although Allen recently pointed out that /might/ have been due to attempts to access CPU cores that weren't powered up. Anyway, it was enough to do something useful at least on the AVP CPU if not the A9s. I mention this because I tried the exact same setup on Harmony, and also couldn't get OpenOCD to connect at all IIRC. I'm afraid I haven't investigated this. So, at least we're in the same boat.
Quoted 3 lines
I do have Lauterbach, but the experience of trying to make it work(and failing to do so) made me decide not to use that wunderwaffe ever again, unless my parents are being held hostage or something.
I believe most JTAG use within NVIDIA is with a Lauterbach:-(
Quoted 1 line · Tom Warren
As Stephen says - whoever gave you the Harmony originally should be able to help you get the debug board to go with it.
Thank you very much for all your contributions!
I've just contacted NVIDIA, from whom I bough my Harmony board, and asked for the external debug board. Unfortunately, the only way to acquire / get assistance on these products is through their developer portal, which has been under maintenance for the past two months...
Do you have any idea about alternative hardware manufacturers or distributors that commercialize the debug board for Harmony? Otherwise, it seems that I'll have to change hardware platform...
Thanks again,
--Nuno
A message that is not in the archive (sent off-list or not yet received): [email protected]
Quoted 5 lines · Nuno Santos
Quoted 2 lines · Tom Warren
As Stephen says - whoever gave you the Harmony originally should be able to help you get the debug board to go with it.
Thank you very much for all your contributions!
Quoted 8 lines
I've just contacted NVIDIA, from whom I bough my Harmony board, and asked for the external debug board. Unfortunately, the only way to acquire / get assistance on these products is through their developer portal, which has been under maintenance for the past two months...
Do you have any idea about alternative hardware manufacturers or distributors that commercialize the debug board for Harmony? Otherwise, it seems that I'll have to change hardware platform...
Sorry, I sincerely doubt the board is available through anyone but NVIDIA. I'll ask internally and see if the board is available for external purchase.
I believe Peter De Schrijver has used JTAG on the TrimSlice, but again you need a (different) debug board, and I have no idea if Compulab make those available. I CC'd Peter to see if he knows.
A message that is not in the archive (sent off-list or not yet received): [email protected]
Quoted 15 lines · Stephen Warren
Quoted 5 lines · Nuno Santos
Quoted 2 lines · Tom Warren
As Stephen says - whoever gave you the Harmony originally should be able to help you get the debug board to go with it.
Thank you very much for all your contributions!
Quoted 8 lines
I've just contacted NVIDIA, from whom I bough my Harmony board, and asked for the external debug board. Unfortunately, the only way to acquire / get assistance on these products is through their developer portal, which has been under maintenance for the past two months...
Do you have any idea about alternative hardware manufacturers or distributors that commercialize the debug board for Harmony? Otherwise, it seems that I'll have to change hardware platform...
Quoted 7 lines
Sorry, I sincerely doubt the board is available through anyone but NVIDIA. I'll ask internally and see if the board is available for external purchase.
I believe Peter De Schrijver has used JTAG on the TrimSlice, but again you need a (different) debug board, and I have no idea if Compulab make those available. I CC'd Peter to see if he knows.
I tried to, but I never managed to get it to work unfortunately and gave up.
Cheers,
Peter.