[chbot] Atmel Programmers

[Volker Kuhlmann]

Hi Charles,

thanks for your input, much appreciated! I trust your experience, but
the speeds don't quite make sense to me.

> High speed is a bit more
> important if you are working with large images (eg. using JTAG to
> debug a Linux kernel on an omap).

Rumour has it that running gdb on that kernel is also very effective,
but Linux on embedded systems is not currently on my plans.

> These devices can shift approx 0.5Mbytes per second

How does this work, out of interest? Serial ports finish at 11.5kbyte/s,
so there must be another way.

I have been playing with LPCXpresso hardware (because it's cheap),
upload speeds on its JTAG is about serial port speed. Not impressive,
and that's with the ARM on the JTAG just about more powerful than the
real thing. (As an aside, I recommend to stay clear of the Code Red IDE.
Too many things wrong with it, only one being the absence of a datasheet
for the JTAG ARM. Eclipse is very nifty though.)

> device) so loading a  debug image on a smaller ARM is sub-second and
> stepping, debugging etc is instantaneous.

Not with LPCXpresso, but I look forward to 5 steps up with a cheap
flyswatter or similar... How do you control this? Is the ARM eclipse
plugin good?

I got the eclipse AVR plugin to go and it's a bit of a disappointment.
It's buggy, needs too much fiddling just to get the programming part to
go (with avrdude), and there's no debugging at all.

Volker

-- 
Volker Kuhlmann
http://volker.dnsalias.net/	Please do not CC list postings to me.