Re: ATSTK525 Starter Kit

On Mon, 11 Dec 2006 10:51:01 -0600, David Kelly <n4hhe@xxxxxxxxx>
wrote:

linnix wrote:
Steve Calfee wrote:

Well, a USB boot loader would be ok. How do you debug?

I believe that you have to debug over Jtag.

Is there a GDB stub that works over this USB interface?

No, you can't debug with the boot loader.

But you can gdb over the JTAGICE interface. I have been exceptionally
pleased with this $40 JTAGICE tool. A touch slower over serial interface
than the genuine Atmel JTAGICE-mkII which I also had, but the ICE-Cube
drew far less power from my circuit. My target and the ICE-Cube ran off
a 3.3v 50mA supply where the mkII would not:
http://www.ecrostech.com/AtmelAvr/AvrIceCube/index.htm


Thanks for the info. This means that for less than $300 it could be a
nice development platform.

Is there a GNU tool chain?

Yes, except for the debugging. AVR debugging info is not available to
the general public, except with an NDA.

Gdb works with the AVR JTAGICE. See:
http://winavr.sourceforge.net/helpme.html

As for NDAs, the primary WinAVR developer was hired by Atmel. Can't say
I know how much he's permitted to work on WinAVR during the day but AVR
Studio has gone from almost no avr-gcc support/integration to
acceptable. I'm old school and prefer to define my project in a Makefile
than in an IDE so I edited and compiled outside of AVR Studio, but
preferred to load code and debug using AVR Studio.

What I was thinking about is starting an open source project doing a
cross platform usb host and device stack for embedded systems. So if
other people wanted to help, it would be very nice to have a cheap
development board with portable tools etc. I have another platform
that is not open source for the OS, so not so good for open
development.

I haven't looked in the last year or so but back then USB was fairly new
to AVR and getting one's hands on their USB stack/library was more than
a casual hobbyist commitment.

I was not talking about using their package (although finding out how
they do the low level host and device I/O is required - either by
looking at chip/board docs or at sample code). I would like to do a
hardware abstracted, small embedded system USB host and device stack,
that would work on multiple platforms. It is a given that such
platforms would need appropriate hardware support.

I know it is non-trivial.

Thanks for your helpful responses.

Steve
.

Relevant Pages

  • Re: ATSTK525 Starter Kit
    ... a USB boot loader would be ok. ... I believe that you have to debug over Jtag. ... But you can gdb over the JTAGICE interface. ... Gdb works with the AVR JTAGICE. ...
    (comp.arch.embedded)
  • Re: ATSTK525 Starter Kit
    ... a USB boot loader would be ok. ... I believe that you have to debug over Jtag. ... Yes, except for the debugging. ... Gdb works with the AVR JTAGICE. ...
    (comp.arch.embedded)
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