Main Page
From Openjtag
www.openjtag.net
this site has just been rebuilt it may still lack some content of the original site but work is in progres (slowly) at converting the format and trying to bring the information back up to date and finding the best way to include it in the new site format
Welcome to the OpenJTAG Wiki
NOTE on editing this site
dew to persistant spamming of this site we have set it so you need to register to edit pages since this alone has not stopped the persistant spammers from just creating random accounts then posting we have had to prevent new account creation
we do not wish to prevent genuine edits and regret having to resort to this , if you would like and account please email openjtag@whipy.demon.co.uk and i will create an account and email you the details
Contents |
overview of JTAG
JTAG is a port that allows to directly attach and logically manipulate various kinds of silicon.
A typical setup would be: A host computer connecting over Parport, Serial, USB, Ethernet to a JTAG host interfacewhich connects to the JTAG port on the target device.
JTAG is a whole lot more than just programming of devices.
It was designed to be used in test and qualification of systems down to the chip level.
As such it can be used for debugging of Bootloaders, Drivers and other low level operations in embedded systems.
About the OpenJTAG project
This project aims to enable an embedded developer to program, verify and debug a system utilizing the JTAG interface
to Build an open design for a JTAG host interface. There are several options that could achieve this:
there are a number of main goals of the project
1. Emulate functionality of parallel port based "Wiggler" interfaces.
2. Increase programming speed against the parallel port based interfaces.
3. Add additional functionality. e.g. Built in serial ports
4. Add target devices.
Main Site Contents
there are 3 main types of jtag adaptor covered by this project
>old discusion page about them <
>discusion on posible solutions<
| a simple parallel port adaptor |
| a USB based adaptor |
| High speed JTAG interface |
also for reference a list of some comman JTAG pinouts
here >jtag pinout information<
and the FAQ
here >OpenJtag FAQ<
related projects these are projects that are directly related to the openjtag project
APEX Boot Loader
- This project is implementing a new boot loader.
http://wiki.buici.com/twiki/bin/view/Main/ApexBootloader
The GEEP-B
- The GEEP-B FPGA board
other links
and some usefull links to sites related to this project
here >useful related links<
