USB based JTAG ??

Post new topic   Reply to topic    DD-WRT Forum Index -> General Questions
Goto page Previous  1, 2, 3, 4, 5, 6  Next
Author Message
redhawk0
DD-WRT Guru


Joined: 04 Jan 2007
Posts: 11563
Location: Wherever the wind blows- North America

PostPosted: Fri Apr 03, 2009 13:10    Post subject: Reply with quote
usbjtag wrote:
The JTAG on http://www.jtagtest.com is used for chip testing. USB JTAG NT is used for program the flash based on MIPS core. It will support more CPUs in the future. It has SPI flash support (Not using JTAG).


I hope I didn't disrespect you in my above post...I didn't mean to and it wasn't my intent.

I was just trying to point out that many of us don't have a great need for JTAG on a regular basis (I acutally use it quite a bit...generally once or twice a week...due to dd-wrt development testing) but the cost of a full blown setup is prohibitive for the average user.

I appreciate you working with us to find a cost effective solution.

Thanx...

redhawk

_________________
The only stupid question....is the unasked one.
Sponsor
lattjo
DD-WRT Novice


Joined: 01 Feb 2009
Posts: 2

PostPosted: Fri Apr 03, 2009 13:21    Post subject: Reply with quote
Go for an ftdi-based solution. Documentation of driver is available at http://www.ftdichip.com
A cheap ready-made device is available at http://www.olimex.com/dev/arm-usb-tiny.html and there is also another one here: http://www.amontec.com/jtagkey.shtml
Those two are more or less the same, some small adjustment needed in code to support both.
tcharron
DD-WRT User


Joined: 12 Aug 2007
Posts: 112

PostPosted: Fri Apr 03, 2009 14:10    Post subject: Reply with quote
lattjo wrote:
A cheap ready-made device is available at http://www.olimex.com/dev/arm-usb-tiny.html and there is also another one here: http://www.amontec.com/jtagkey.shtml
Those two are more or less the same, some small adjustment needed in code to support both.


But, $52USD and 129Euro is still too expensive...
dellsweig
DD-WRT Guru


Joined: 07 Jun 2006
Posts: 1476
Location: New York, USA

PostPosted: Fri Apr 03, 2009 16:10    Post subject: Reply with quote
tcharron wrote:
lattjo wrote:
A cheap ready-made device is available at http://www.olimex.com/dev/arm-usb-tiny.html and there is also another one here: http://www.amontec.com/jtagkey.shtml
Those two are more or less the same, some small adjustment needed in code to support both.


But, $52USD and 129Euro is still too expensive...


I would have no issue with a $50 solution.....
Shawn360
DD-WRT Guru


Joined: 26 Jul 2008
Posts: 1237

PostPosted: Fri Apr 03, 2009 16:46    Post subject: Reply with quote
tcharron wrote:
lattjo wrote:
A cheap ready-made device is available at http://www.olimex.com/dev/arm-usb-tiny.html and there is also another one here: http://www.amontec.com/jtagkey.shtml
Those two are more or less the same, some small adjustment needed in code to support both.


But, $52USD and 129Euro is still too expensive...
Agree! How hard is it to truly get a cheap chip for USB and put it together these prices seem way to high.
usbjtag
DD-WRT Novice


Joined: 29 Sep 2008
Posts: 13

PostPosted: Fri Apr 03, 2009 21:34    Post subject: Reply with quote
Hardware itself is not expensive, the software put together is a lot of work.
Looks like there is a need for open source FTDI JTAG solution. That way the price can be quite cheap. Many need to contribute to the project. I would still expect the cost will be close to $10 to build.
redhawk0
DD-WRT Guru


Joined: 04 Jan 2007
Posts: 11563
Location: Wherever the wind blows- North America

PostPosted: Fri Apr 03, 2009 23:17    Post subject: Reply with quote
usbjtag wrote:
Hardware itself is not expensive, the software put together is a lot of work.
Looks like there is a need for open source FTDI JTAG solution. That way the price can be quite cheap. Many need to contribute to the project. I would still expect the cost will be close to $10 to build.


Yeah...Tornado and I had talked about his today. If we can get the cost in the $10-20 price range...that would be the range where anyone that needs to use JTAG could purchase (or build from kit). Many of us still have older hardware (parallel ports) but any of the newer units coming out...people are finding themselves stuck.

Thanx again for your input regarding a USB JTAG solution.

redhawk

_________________
The only stupid question....is the unasked one.
DHC_DarkShadow
DD-WRT Guru


Joined: 22 Jun 2008
Posts: 2440
Location: Am now Dark_Shadow

PostPosted: Sun Jul 19, 2009 21:43    Post subject: Reply with quote
So in a nutshell the product at www.usbjtag.com will work with WRT54G based routers? Like the ones in my sig?
_________________
The New Me
dellsweig
DD-WRT Guru


Joined: 07 Jun 2006
Posts: 1476
Location: New York, USA

PostPosted: Sun Jul 19, 2009 22:42    Post subject: Reply with quote
DHC_DarkShadow wrote:
So in a nutshell the product at www.usbjtag.com will work with WRT54G based routers? Like the ones in my sig?


where do you see that it will work??

I believe this is from a discussion I was involved in a couple months ago.

I have a Digilent USB JTAG adapter - I even offered it to Tornado to see if he could work with it.

To my knowledge - there is not a USB based adapter that will work.

I had asked if a USB to paralell adapters will work with the current paralell interface JTAG

I never got an answer to that
barryware
DD-WRT Guru


Joined: 26 Jan 2008
Posts: 13049
Location: Behind The Reset Button

PostPosted: Sun Jul 19, 2009 23:31    Post subject: Reply with quote
dellsweig wrote:
DHC_DarkShadow wrote:
So in a nutshell the product at www.usbjtag.com will work with WRT54G based routers? Like the ones in my sig?


where do you see that it will work??

I believe this is from a discussion I was involved in a couple months ago.

I have a Digilent USB JTAG adapter - I even offered it to Tornado to see if he could work with it.

To my knowledge - there is not a USB based adapter that will work.

I had asked if a USB to parallel adapters will work with the current parallel interface JTAG

I never got an answer to that


Usb to parallel WON'T work.. I've tried it with different devices and drivers.

I thought T~ was working on the interface for a USB adaptor...

Actually.. The available usb jtag adaptors will work with a router but is not as simple as using T~'s utility.. You need to specify the flash chip params in hex.. Size, start, length, etc.

I don't have a usb jtag adaptor.. I have just been reading the docs on available devices..

_________________
[Moderator Deleted] Shocked
DHC_DarkShadow
DD-WRT Guru


Joined: 22 Jun 2008
Posts: 2440
Location: Am now Dark_Shadow

PostPosted: Mon Jul 20, 2009 0:15    Post subject: Reply with quote
dellsweig wrote:


where do you see that it will work??


Tornado wrote:


The only USB Based jtag I have used is from:
http://www.usbjtag.com/

The author and a forum member sent me the adapter and software free of charge to test. He is a knowledgable and nice person. I have used this adapter on Windows 7 beta 64bit and his 64bit driver, and after some configuration, I was able to achieve some impressive flashing speeds, although this was because of his programming, not the usb adapter.

_________________
The New Me
DHC_DarkShadow
DD-WRT Guru


Joined: 22 Jun 2008
Posts: 2440
Location: Am now Dark_Shadow

PostPosted: Wed Aug 05, 2009 15:40    Post subject: Reply with quote
DHC_DarkShadow wrote:
So in a nutshell the product at www.usbjtag.com will work with WRT54G based routers? Like the ones in my sig?


dellsweig wrote:
where do you see that it will work??

I believe this is from a discussion I was involved in a couple months ago.

I have a Digilent USB JTAG adapter - I even offered it to Tornado to see if he could work with it.

To my knowledge - there is not a USB based adapter that will work.

I had asked if a USB to paralell adapters will work with the current paralell interface JTAG

I never got an answer to that

Tornado wrote:
Hello all,

I think we need usb jtag support in Tjtag, As tcharron and LOM have pointed out, there are a few issues. First, no really standard, everyone make there own drivers, etc..

Like LOM pointed out, it would be best to find a cable supported by OpenOCD or Urjtag, and possibly the AVR project, since to source is open, we may be able to borrow from it.

The Blackcat device looks interesting, I will have to look at it more closely.

dellsweig,
If I were you I would buy at least ont of the 6 pin MTE cables and or make one, so that you can easily connect to the correct pins on boards that have a strange or different type pinout. Also, send me the example source and info on the adapter that you bought so I can look over it. These MTE cables are good for the parallel port adapter as well.

The only USB Based jtag I have used is from:
http://www.usbjtag.com/

The author and a forum member sent me the adapter and software free of charge to test. He is a knowledgable and nice person. I have used this adapter on Windows 7 beta 64bit and his 64bit driver, and after some configuration, I was able to achieve some impressive flashing speeds, although this was because of his programming, not the usb adapter.

So, we need to find an adapter like that metioned above...or make our own, capable of being constructed by hobbiest like myself. It would make sence for me to shell out some bucks for a good adapter, but not for most people or users that only do this once or twice.

Also, without having the device, it makes it very time consuming trying to write for it.



Looks like to me it will work with the linksys wrtG models.

_________________
The New Me
ak4d7
DD-WRT User


Joined: 12 May 2009
Posts: 90

PostPosted: Wed Aug 05, 2009 18:32    Post subject: Reply with quote
i can confirm that the usbjtagNT works to debrick wrt54g v8 router from usbjtag.com
DHC_DarkShadow
DD-WRT Guru


Joined: 22 Jun 2008
Posts: 2440
Location: Am now Dark_Shadow

PostPosted: Wed Aug 05, 2009 18:34    Post subject: Reply with quote
Well with that, I think that will be my next purchase. Not because I need it but because I want it. Twisted Evil
_________________
The New Me
dellsweig
DD-WRT Guru


Joined: 07 Jun 2006
Posts: 1476
Location: New York, USA

PostPosted: Wed Aug 05, 2009 18:36    Post subject: Reply with quote
ak4d7 wrote:
i can confirm that the usbjtagNT works to debrick wrt54g v8 router from usbjtag.com


Can you post the process (using this adapter)

include connections, settings and software on the PC (screen shots would be wonderful) and commands

I am going to order one of these

THANKS

Dan
Goto page Previous  1, 2, 3, 4, 5, 6  Next Display posts from previous:    Page 4 of 6
Post new topic   Reply to topic    DD-WRT Forum Index -> General Questions All times are GMT

Navigation

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum