JTAG - anyone get it to work fully? (technical discussion)

@arci

this one is a premium and i have followed the procedure you have shown. After teh flash routine finised, i reboot box both with the JTAG enabled( r309 shorted) and disabled, but get the same response. I was never able to get JTAG working on elite modelbut will retry when i get this one working.


EDIT: there is one step i did not do, sometimes its suggested, sometime not. before programming the flash, do this

./tjtag -erase:wholeflash /noreset. so that is another thing i will test.


@digihoe

no,i never tried to read the flash, i will try this but allteh responses seem to indicate teh JTAG is working. If you have some information on how to just upload the YAMON, it is something i thought to try. From the docs it seems you have to build a special YAMON ( see extract below). maybe someone has these built already?


=================doc extract==============
Before user connects the emulator to the JTAG port on board, there are some preparation work to do. The first thing is to ensure the JTAG is enabled on the board. For Sigma's reference boards, typically there is one jumper to enable JTAG connection. This jumper has to be set. The second thing is to get the software ready by building a special version of YAMON. This can be done by modifying YAMON's Makefile, so that WITH_RESET=y and WITH_XENV=n before rebuilding YAMON. The third thing is of course getting the image to be flashed onto the board ready. Typically this involved with getting replacement XENV block ready, make sure the first level boot is signed with right certificate, ... and so on.

There are two files of the interests after YAMON is rebuilt, and these two images will be loaded via JTAG onto the board later. Please note if older version of YAMON is used, the version number is 02.06 instead:

reset-02.11-SIGMADESIGNS-01.elf
yamon-02.11-SIGMADESIGNS-01_el.elf

Quote:

---

Originally Posted by happyhammer

@arci

this one is a premium and i have followed the procedure you have shown. After teh flash routine finised, i reboot box both with the JTAG enabled( r309 shorted) and disabled, but get the same response. I was never able to get JTAG working on elite modelbut will retry when i get this one working.


EDIT: there is one step i did not do, sometimes its suggested, sometime not. before programming the flash, do this

./tjtag -erase:wholeflash /noreset. so that is another thing i will test.

---

OK ! You have to try!

But ...
You've checked the log of telnet (remove protection) if will be signaled some anomaly?

Very strange, as you will read all claim to be able to reprogram the nor-flash, unless you have other hardware problems !

Rg ... Arci

Quote:

---

Originally Posted by arcibald

Very strange, as you will read all claim to be able to reprogram the nor-flash, unless you have other hardware problems !

Rg ... Arci

---

yes, but most seem to have a "xenv cs2 failed" or "zboot failed", perhaps because i do not get a "failed" message i have something more complicated.

I need to Jtag a Azbox Elite.

Can someone send me the information required to Jtag my Elite Box.

Thanks

i dont know anyone who has done it yet, including me... what skills do you have to attempt it? ie. have you a technical background to attempt the possible tasks? can u solder smt components, use linux pc etc.. see some of my posts regarding his subject. whats the output from the serial port?

When you are able to Jtag please let us know who to do it.

I believe I have the skills and knowledge needed to follow a good guide like the one provided by Pr2.

JTAG it has been done i have the az hd premium plus and it was stuck in
booting i had my friend who is a computer programer to help me and i am back up and runing.i dont remember where i got the file but i do have it on
a pindrive but i dont no how to get it to you and you may allready have it
i dont no but i do no it works.:cool:

In german forum is spoken that the ttl-level is to less.

So they taked a usb Nokia Data Cable CA-42. And with these cable they don't have problems.

http://www.myazbox.de/forum/index.ph...achmentID=2008

Quote:

---

Originally Posted by zeini

In german forum is spoken that the ttl-level is to less.

So they taked a usb Nokia Data Cable CA-42. And with these cable they don't have problems.

http://www.myazbox.de/forum/index.ph...achmentID=2008

---

thats just getting the serial interface working, nothing to do with JTAG.


I can't get the JTAG to halt the processor now, even though it did work before ansd seemed to reprogram the flash, so i am unable to test again at the moment, not until i can get this working again but i cant see whats wrong.
Getting the processor to halt seems to be the hardest thing with the JTAG interface, this is also where others got stuck with the elite model.

happyhammer if you cant get it to stop running with the key board just
unplug it from the mother board and that will stop the proses then plug it
back in then you can move to the next step.:respect-040:

i used a usb to ttl uart serial converter 6 pin.
usb end plugs to computer 6 wire end only need 3 wires to mother board
send wire recive wire and gnd wire. the az mother board has 4 pins you only
use 3 .
send wire from computer goes to recive pin on az
recive wire from computer goes to send pin on az
gnd on computer goes gnd on az
and you need a rj 45 crossover cable.

happyhammer you need to use CONTROL=C=in the instruction you must do
it quick to stop it.

here is where you can get the file and the info that i used to get my az
hd premium plus up and running.do a google serch for dss pros
the file was posted by herryb.the how to is in english spanish
and one other dont no that one is.

Quote:

---

Originally Posted by iq180

happyhammer you need to use CONTROL=C=in the instruction you must do
it quick to stop it.

---

Thx for your input but you are confusing recovering the box via serial port and Yamon and recovering the box using the JTAG which has to be done when the box is stuck in BOOTING before it has reached the point of loading YAMON into the box

happyhammer i was stuck in booting to with no menu and no tv screen.
google dss pros the file name is recoverazbox it was posted by harryb
this is what i used to get my az out of booting it works.
there is a complet how to use with files and loaders with pic of
mother boards of 3 kinds of az boxes.
if it dont help then you talk junk to me.LOL.

@iq180
Jtag and Yamon are not same procedure.

i no jtag and yamon are not the same but the outcome is the same
it will recover a booting az box=i have just done it and my az is up
and running perfect is yours.:cheers2:

Quote:

---

Originally Posted by iq180

happyhammer i was stuck in booting to with no menu and no tv screen.
google dss pros the file name is recoverazbox it was posted by harryb
this is what i used to get my az out of booting it works.
there is a complet how to use with files and loaders with pic of
mother boards of 3 kinds of az boxes.
if it dont help then you talk junk to me.LOL.

---

That zip file is simply outlining the procedure to recover box via the serial interface and YAMON.....it is not recovering the box via JTAG. This topic is about using the JTAG interface to recover the box ,,,get it?

just trying to help you get the az box up and running.
i no this is not a normal form of jtag but any time you hook
directly to the mother board it is a form of jtag
and this does bring the az out of booting and back to life
and if i can help you let me no.
THANKS:cheers2:

xosPe0 serial#af89760169b59a310a517817a4 02b5e3 subid 0x50
xenv cs2 failed
xenv cs3 failexosPe0 serial#af89760169b59a310a517817a4 02b5e3 subid 0x50
xenv cs2 failed
xenv cs3 failed¡Ãpower supply: ok
dram0 ok (8)
zboot (1) failed

for me,all is failed.some tutorial from windows existing??