[imran]

I am using the JTAG cable as shown below , please let me know if there is any fault in it
Also I am using a 14 pin cable and its oin 13 and 14 are not being used ... can it cause any problem

[kisbetu]

[Tornado]

@imran

You do not want to tie jtag pin 12 to ground, I tie only to pin 6 on the jtag pin on the router

Let me know ?

[imran]

I have connected all four pins as shown in that picture. Do you mean to say that I need to connect only pin6, all other three pins should be open ?

[Tornado]

What Im saying is, is that I only connect pin 18-25 from the parallel port to pin 6 on the target board. You can tie others but you have to make sure they are only ground pins. For Broadcom based boxes you do not want to connect to pin 12 on the jtag connecter as a ground.

[Victek]

WRT160N V.1.0 jtag v3 working, here is the pinout. ah! /fc:98 in this case, check for different flash memory.

Paralel Port-----------> PCB WRT 160N (JP1)
Pin 2 (TDI) ----------------------.> Pad RH6
Pin 3 (TCK)----------------------.> Pad RH14
Pin 4 (TMS)----------------------.> Pad RH11
Pin 13 (TD0)---------------------,> Pad RH7
Pin 20-25 (GND) ---------------,> Pad RH15

more info an test here: http://www.adslzone.net/postt174111.html

Regards

[Shawn360]

[Tornado]

Shawn, did you test this on the WRT160N ? I was having some problems with 8 bit on Atheros, but I don't have any 8bit bus devices to work with either.

[kisbetu]

Hi Tornado!

Some weeks ago I made tests with a 160N, but I had to give it back.
When You published v3-RC1, the guy tried it.

This is the "result":

==============================================
EJTAG Debrick Utility v3.0 RC1 Tornado-MOD
==============================================

Probing bus ... Done

Instruction Length set to 8

CPU Chip ID: 10010100011100000100000101111111 (9470417F)
*** Found a Broadcom BCM4704 KPBG Rev 9 CPU chip ***

- EJTAG IMPCODE ....... : 00000000100000000000100100000100 (00800904)
- EJTAG Version ....... : 1 or 2.0
- EJTAG DMA Support ... : Yes
- EJTAG Implementation flags: R4k MIPS32

Issuing Processor / Peripheral Reset ... ECR: 0x00248108 Done
Enabling Memory Writes ... Mem 0x0000001a
Done
Halting Processor ...
00000000001000001000000100000000 (00208100)
00000000001000000000000100000000 (00200100)
<Processor Entered Debug Mode!> ... Done
Clearing Watchdog ... Done
Probing Flash at (Flash Window: 0x1fc00000) ...
Done

*** Unknown or NO Flash Chip Detected ***

*** REQUESTED OPERATION IS COMPLETE ***


C:\Documents and Settings\Apa\Release-RC1\Windows>

His flash chip is Eon EN29LV320AB.
As the router is far away from me, I cannot test it anymore.

[Shawn360]

@Tornado no I didn't test it on a WRT160N but Victek seems to have got it working on his WRT160N.
http://cdn.adslzone.net/pub/repos/victek/jatg/jtag_top.png
http://cdn.adslzone.net/pub/repos/victek/jatg/jtag_bottom.png
http://cdn.adslzone.net/pub/repos/victek/jatg/pc260003.jpg
http://www.adslzone.net/postt174111.html


@kisbetu You may want to try to manually select your flash chip /fc:98 /nodma
Seems to have work for him http://cdn.adslzone.net/pub/repos/victek/jatg/jtag_top.png

[Tornado]

@kisbetu

I have added support for 8bit bus, but like I said, I can't really test it, no 8bit bus routers Eko has tested it a little for me...but its still hard doing testing that way.

[Tornado]

@Shawn360

Ok, but this is reading, not writing, BIG difference

[Victek]

You're correct I posted the pinout, I can read BUT I can't write.

[wpaynter]

I have used the jtag pinout provided by Victek and used tjtagv3-RC1 from Tornado and have success backing up a few of the various pieces (CFE,NVRAM) of the firmware of a WRT160N.
Then I tried to erase the nvram and it stopped half way.
The first code block shows the output of that command:

[Victek]

Try /nodma , like this