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[HOW TO]Jtag a HTC Touch Elf(in)

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By captainstu72, Senior Member on 1st April 2010, 01:31 PM
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14th April 2010, 08:40 PM |#11  
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Hey to anyone who is still watching this.

I have just got my elfin all wired up, ready to go, circuit is fully continuous and there are no bridges (I haven't soldered for more then 8 years!)

However, I have been a bit stupid, my pc doesn't have a parallel port. I'm going to buy one tomorrow and get going - very annoyed about this set back, i'm such an idiot for not checking!

I'll try it tomorrow night hopefully, worst case would be friday/saturday - A long time since starting this projct, but my hopes are high and I really hope I can help some of you guys out there!

Just thought I should update you all, I don't want this thread to become dead... like our elfs :P

Stu
 
 
15th April 2010, 02:04 AM |#12  
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LOL..no need to worry that your thread is dead.

I'll visit this thread everyday to see how it's going

BTW...do we really need the LPT Socket to do the JTAG? if so, then I will have to ask my IT man in my company to find me a "no-used" LPT socket, lucky I have an old Pentium 3 PC that I might be able to use it for this JTAG matter.

Please update the step-by-step tutorial here with photos so I can follow you easily. FYI, I am blind in this JTAG matter, so please do not mind to answer my next "silly questions".

Keep going! Thanks
15th April 2010, 08:06 AM |#13  
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Parallel is the only interface I have found to do it on - I would have much prefered usb or something more up to date, but we can't always have what we want.

Below are a few links that I read through before doing anything, just so I could get a vague understanding. I'm workign on the guide today on my lunch - the last part will have to be in theory.

Jtag Introduction
Someone Jtag'd an Ipaq (not the same but the concept)
Has some links to JTAG
Program we will be using for the jtag
NoIceDebugger - A program I will be using
What I think our Processor is
OMAP 850

Again, I will be making a an actual guide, this is just some reading before hand that i did that may be useful!

Stu
15th April 2010, 09:18 PM |#14  
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hey, well, i have a parallel port and have attempted the jtag.

It didn't work.

My guess is i was using too long cables, or something has come loose. My continuity tester has now died so i will be testing again on the weekend.

I'm going to post the guide i am working and what i did tomorrow. Maybe someone (bom81) would be able to give it a go and do well as i'm sure he will.

Sorry for the failure, but i am really optimistic that it will work, and that it didn't only because of something i may have wired wrong that someone else does right. I'm going to try and get a thirc elf to break and fix as well as it may just be the one i am doing is beyond repair.

Bom81, if you give this a go, good luck. I'm sure you'll have some luck!
If anyone else tries when i have the guide up, please please let this thread know, even if it doesn't work.

Stu
16th April 2010, 06:38 AM |#15  
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Hi Stu..
Can you give me the russian forum that explain about this jtag on HTC Touch.
I'm going to learn it there.

BTW, how long have you made the cable? have you cut it shorter and try again the connection?

Try to read this thread : http://forum.gsmhosting.com/vbb/f98/...in-rom-650359/

This guy has the same problem with us but finally (or luckily?), the device could come to Bootloader mode. I'm going to try to PM him, so he can explain how did he get the device work.

Thanks for your try.

Regards,
Bom81
16th April 2010, 12:02 PM |#16  
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This is for the wizard - same omap 850 http://pda2u.ru/forum/index.php?showtopic=348

I can't find my link for the touch, it may be on my home pc, but it was on the same website iirc.

Cable was about 50cm's - Too long, so I am remaking it to around 15cms tonight, but will be fun as I do not have my continuity tester to make sure that the circuit has the right resistance etc. before I think I was going over by too much due to cable length.

I have started the guide, I just need a few files off my home PC, so I will do this tonight again.

It really annoys me when other threads/sites do not put everything down they have tried, the internet is for information, not for saying, "ha, i've done it!"

I'll try again tonight and tomorrow, I think I have my LPT PCB sockets waiting to be collected, all the way from China, so this will be easier for me to do ultimately.

I haven't yet given up hope, and I'm sure that if I get my document made, someone will be able to tweak it and further help us.

I just don't know how many people are using the Elf's anymore, its fine there being a thread saying we have 900's htc touch's, but how many still use them and are active on this community.... but I digress.
16th April 2010, 05:42 PM |#17  
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I am really sorry that I am not good in Electronic thing, nor that I know how the electronic equipment works.

But I will try to learn from the website url you provided. Afterall, my HTC is already dead, it will not be a big problem if I make some experiments on it. If I'm lucky enough, I might wake a Frankenstein from his dead. LOL !!

Thanks,
Bom81
17th April 2010, 10:09 PM |#18  
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JTAG HTC device
Thanks first of all for your effort captainstu72 and bombom81, very interesting thread.

I am also in the same situation - having a bricked device (flashed wrong ROM and/or wrong carrier) and thus also interested in getting a serial cable hooked up to it no bootloader - no reset. The device is therefore software-wise dead.

I would therefore also love to try your procedure to getting a JTAG connection to the device. I have not been dealing with soldering on electronic devices since I did this on commodore 64... quite a few years ago as you imagine but therefore even more exciting.

I will check this thread and get a serial cable. Oh does the H-JTAG Software also run from linux since I only work on linux on this machine?

Thanks in advance and let me know if I can be of any help in this.
Oliver
19th April 2010, 02:25 AM |#19  
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Hi Stu and ITCons (welcome to the thread)

I've read the Russian website and have made a translation of the thread from Russian to English using Google Traslate.

Unfortunately, as I said before, I have no competency in electronic, but I'll try to learn.

All credits for the compiled document will go to user id : MEDUSH and ARCC in the Russian Forum (PDA2U.Ru), as they mentioned this document might be reprinted by their copyright.

Please have a read to the document I attached...I'll come back if I'm finding out something (as this week I'll face my busiest week of the month, there are some reports in my daily jobs that I need to prepare to my Boss...LOL).

Thanks for your kind attention.

Regards,
Bom81
Attached Files
File Type: zip Repair Dead HTC.zip - [Click for QR Code] (5.96 MB, 285 views)
19th April 2010, 08:18 AM |#20  
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Thank you very much Bom81

I have found another thread on this forum as well in the gene section, which shows how they did it on the gene too (omap 850 processor as well) I have posted on there to ask if anyone can relink to the revised download, but so far, there has been no update.

I'm going to go through what you have posted tonight bom, it matches most of what I was going which is always good (from my point of view, as it means i wasn't chasing a lost cause)

Sorry for not posting the guide yet, i'm slacking! But now, obviously, it does not matter so much as bom has posted an excellent guide in his post.

ITcons - I have had a (very) quick look, I don't think HJTAG runs on linux, although I would be interested to see how it would work in cedega/wine (this is not something I can test personally), I hope it would be able to use the LPT ports etc correctly - but again, nothing I really have a whole lot of experience about.

I'll see how it goes tonight, hopefully I should have remade my circuit again, and will be ready to test once more! - This time I am using an LPT PCB Socket - hopefully easier to do as there will be less in the way of resistance from excess cables.

Stu
22nd April 2010, 12:03 PM |#21  
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Hey,

I've not let this thread die! I've been busy with work and sorting a car out for my fiancee...

I have remade my circuit, and need to get this onto the phone tonight. I found out I also had a broken wire on my last setup, which was clearly going to be a bit of an issue.

My new circuit is about 10cms long, so will be good to see if this works!

Also, does anyone know if the wattage makes a difference on the resistors? I haven't seen anything yet that say. I am using 0.25w.

Have you guys tried this yet? Or are you awaiting my findings before you have a go?

Stu
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