Re: [gnuarm] Jtag Circuit Diagram

--------------- Original message -------------
From : "Ian Guffick"<iguffick@iee.org>
To : <gnuarm@yahoogroups.com>
CC :
Date : Sat, 18 Nov 2006 5:23:8 +0900 (KST), Fri, 17 Nov 2006 20:18:02 -0000
Subject : Re: [gnuarm] Jtag Circuti Diagram

 

> Hi ALL,
>
> I have board of LPC2138 of ARM7 board. presently i am downloading
> program from my PC to board using RS232(ISP). i wanted to download
> program using J-Tag.
>
> From where do i get complete diagram of J-TAG circuit diagram, so that
> i can develop at my home.(I am not in a position to purchase J-TAG so
> i want it free)
>
> From where do i get Free Utility to download program from My PC to arm
> board using J-TAG connector.
>
> Thanks a lot in advance
>
> Dharmendra
>

 

You will be able to find schematics for "wiggler" interfaces from many places, that will give you the necessary hardware.
For software have a look at OpenOCD at http://openocd.berlios.de/web/
If you have problems configuring/using OpenOCD there is a forum at http://www.sparkfun.com/cgi-bin/phpbb/viewforum.php?f=18

 

There are other interfaces such as the Amontec units :-
http://www.amontec.com/jtagkey-tiny.shtml
Quite cheap and has the advantage of operating over USB (the wiggler uses the parallel port).

 

Regards,
Ian Guffick.