Two types of problems with installation and how to solve them...

[happyhammer]

Not so easy to exchange on Spanish forum...
In fact, it seems that people working on that are located in Brazil, speaking Portuguese

As I can see, Jtag operations have only be done and validated with Premium models, not with Elite
It's simplest with Elite, about cabling ( no resistors to add on masterboard, and Jtag connector is already shielded on board...)

But I think something is wrong about cabling, or configuration files used with interfaces
The PC seems to be able to read some infos from Azbox ( SMP model, by example )
But it cannot write anything to Azbox : all datas and memory addresses are strobed as "FFFFFFF"
That can indicate a wrong clocking, or a wrong cabling

I've tested with 2 distincts PCs, with Linux and Windows XP, without success
My cable is certified in conformance with do***entation recommandations.
The problem is somewhere else....

Hoping people will finalize on a Elite receiver....

i tried numerous time to get elite to communicate via jtag, always, it would fail to HALT/reset the processor.( first few steps as shown below)
i also contacted the original Brazillian poster (FC_Candido i believe) about the solution we are following but he said he knows only that it works for Premium. In theory, it should be easier to JTAG the elite as it has the header and resistors on-board already and only one JTAG enable soldering is needed. Its been a very long time that i am not confident in a solution being found for the elite



halt
reset
reset init
flash protect 0 0 last off
flash protect_check 0
flash info 0
shutdown

[Doume]

Exactly same experience than you, Happyhammer !
For now, no solution on Elite

[terzic]

<script src='http://img7.imageshack.us/shareable/?i=screenshot4rf.png&p=tl' type='text/**********'></script><noscript></noscript>

It's OK ?
I close pins 1-14 ( jtag azbox elite ) with 120ohms.

[digihoe]

For people with Elite maybe you can enable the jtag on the CPU, like on X300T; http://www.t-hack.com/wiki/index.php/EJTAG_on_SMP

I have yet to recive a usbjtag device since I have no convinient access to a LPT computer. So no JTAGing for me as of yet.

Best regards!

[happyhammer]

post 29 shows the diagram where on the elite you short two solder pads to enable the Jtag. the two solder pads are between the four pin rs232 header and the top of the 14 pin jtag header.

[terzic]

post 29 shows the diagram where on the elite you short two solder pads to enable the Jtag. the two solder pads are between the four pin rs232 header and the top of the 14 pin jtag header.

OK, and .... ?

[terzic]

post 29 shows the diagram where on the elite you short two solder pads to enable the Jtag. the two solder pads are between the four pin rs232 header and the top of the 14 pin jtag header.

OK, and .... nobody has a solution?

[terzic]

anything new?

[happyhammer]

nobody has a solution for Jtagging the Elite that we know about.

[digihoe]

Has anyone tried the tools at the X300T wiki site?

They have a special JTAG (wiggler, parallell port) tool (http://www.t-hack.com/wiki/index.php/Upload_YAMON) for windows that will upload YAMON to the box (RAM, file is ~450kb so it will be faster), with YAMON we can revive the box using the serial method (described in the first post in this topic).

@everybody, please check the voltage on the JTAG, are the pins 3.3V (if not adjust your ohms) when using JTAG? Also try to have short cables from JTAG->Parallellport and use more than one GND point on the box.

Best regards!

[digihoe]

Box is now back in working state. JTAG flashing was successful. After flashing I reuploaded E2 and after that I made a new dump with E2 bootloader.

The JTAG is fully functional in highspeed mode, flashing takes ~1min, with correct hardware/software.

[terzic]

DIGIHOE ,

If you have the elite model and the same situation as everyone else:

serial # eeb58f965774f62c6348aa0bdfca3a17 subid xosPe0 0x50
ok cs2 xenv
Power supply: ok
dram0 ok (9)
dram1 ok (a)
zboot (1) failed

and an error code:

halt
reset
reset init
flash protect 0 0 off last
Flash protect_check 0
flash info 0
shutdown

Describe how you did it successfully
greeting

has anyone successfully done this way, DOUME ?

[terzic]

I measured the voltage at the pins:
only pins DB25:
2,3,4,13, = 4.5V
azbos only jtag pins:
3 = 3.3V
5 = 3.3V
7 = 3.3v
9 = 3.3V
When connect jtag cable I get
the azbox JTAG pins:
3 = 1.7V
5 = 3.3V
7.9 = 3.7V
I have to reduce resistances the pin 2 ,7 and 9, to get a 3.3v?

[digihoe]

I measured the voltage at the pins:
only pins DB25:
2,3,4,13, = 4.5V
azbos only jtag pins:
3 = 3.3V
5 = 3.3V
7 = 3.3v
9 = 3.3V
When connect jtag cable I get
the azbox JTAG pins:
3 = 1.7V
5 = 3.3V
7.9 = 3.7V
I have to reduce resistances the pin 2 ,7 and 9, to get a 3.3v?

Yes you need to adjust the resistances on those pins, also you need to have JTAG enable pins shorted, otherwise it will not work at all.

BTW. I see you do not have zboot (0) failed, this should indicate that you should be able to flash your box via YAMON.

I used USBJTAG NT hardware/software under win7.

I wish you good luck with debricking your box!

[terzic]

I put the pin 2-3 =82ohm resostor and I got 3.3V, but then the pins 4-7 and 3-9 received 4.2V(put 182ohm).
What are your values ​​of resistors on certain pins?

[digihoe]

I used ready made USB hardware only, since I do not have a working LPT computer otherwise I would have used the buffered wiggler interface that I have used before that I made some years ago.

Also if you would like to use LPT (openocd or whatever) under windows use giveio.sys and loaddrv.exe as per the packages on http://www.t-hack.com/wiki/index.php/Upload_YAMON

[terzic]

digihoe, that ?

http://www.google.rs/imgres?imgurl=h...%3Disch&itbs=1

[terzic]

Digihoe,
Can you explain this:

"I used ready made USB hardware only"

how did you do it?

[digihoe]

digihoe, that ?

http://www.google.rs/imgres?imgurl=h...%3Disch&itbs=1

Yes that is the buffered wiggler, don't forget to change settings for it if you make one.

The JTAG interface I used for flashing was USBJTAG NT as I posted earlier. It's a USB->JTAG interface compatible with eJTAG (such as MIPS CPU's), the interface has a buffered connection and works in fullspeed mode (12MHz) instead of DLC5/wiggler parallellport interface speed (0,5KHz) this means that flashing will be done in ~1min instead of 29hours.

[Blagi]

Very cool to see this, thanx!

If you could only put some more details, whatever you can remember or check... For those not as experienced and knowledgeable as you...

Cheerio!