[En-Nut-Discussion] AVR JTAG (plus an ARM PS)

Harald Kipp harald.kipp at egnite.de
Tue Jun 1 19:41:39 CEST 2004


on the bottom of http://www.ethernut.de/en/isp/index.html you
can see an advanced JTAG hardware, which had been designed
by Armand ten Doesschate. More at

Armand already did a lot of software, but like me, he seems
to be too busy to work on it regularly. Also Ted Roth
confirmed, that he will help as far as time allows.

However, I assume, that this will never run with AvrStudio.
It's designed for GDB.

If you (or anybody else) is interested to spend some time
on this, please contact a dot doesschate at hccnet dot nl.
I'll also try to help.

At least better than running an ATmega163 emulator on the
PC or Ethernut. :-)


P.S. Not for the public <bg>: Your ARM port is quite useful.
Many thanks. Unfortunately it contains some GPL code. GPL is
not acceptable for Nut/OS distributions. No big deal, but just
in case you didn't know.

At 01:12 02.06.2004 +0900, you wrote:
>Hi All, (Thank Harald)
>    In fact, I've already found ICE200 compatible JTAG cable DIY page 
> online. Not only schematic but also executable code are downloadable. The 
> BOM are almost one ATmega 163 and one RS232 level converter chip. Since 
> the protocol between AVR studio and ICE is published by ATMEL,  I think 
> it is helpful to disassemble and analyze the binary code.  There might be 
> several steps:
>    1. Develop a virtual COM windows driver to interface with AVR Studio.
>    2. Write LPT related code.
>    3. Analyze the ICE binary code and rewrite it for Windows system. Or 
> just write a AVR software simulator to "execute" the binary code.
>LOL, maybe it is not worth spending time and energy on it.

More information about the En-Nut-Discussion mailing list