[chbot] Atmel Programmers

[Synco Reynders]

Hi Jasper,
To answer your questions:
a) I've never actually used debugWire (1-wire), since it's relatively
new and only for the Tiny range of AVRs.
b) Since writing code in C, I've generally only used JTAGs to program
devices since debugging has it's own set of problems.... simply
setting up the JTAG and environment takes time, almost useless when
working on real-time systems where interrupts throw you around, etc.
Admittedly I've found debuggers handy when writing bootloaders, and
finding memory over-runs.
c) I bought the UsbProg as a bag of parts. Although truth to be told,
I programmed it as an AVRISP and never considered changing its
function after that. Now it'd be a perfect platform to make a
debugWire programming interface for it :-)

The other option is to buy a dedicated AVR ISP and USB-Serial
module... See link for both:
http://hobbyist.co.nz/?q=catalog/5

Once you've got your AVR programmer working, you could make yourself a
bootloader so you can reprogram it via a serial port (making the
programmer redundant). Richard had done this and streamlined it nicely
into his Makefile... (any chance you can share this Richard?) I've
actually just started playing with AVR Universal Bootloader
(https://sites.google.com/site/shaoziyang/Home/avr/avr-universal-bootloadere)
so will let you know how I get on.
/s




On 19 October 2011 11:36, Jasper Mackenzie <jasper.mackenzie at gmail.com> wrote:
> Good day,
>  At the last meeting I was talking to a few of you about programmers as I
> need to move away from the wonderful butterfly to more wonderful things
> like attiny's...
>
> The person who knew I would forget their name, had built a ladyada
> programmer which he had modified for single sided board, could you post a
> pdf of the board please, as I dont use eagle. I am using FreePCB (win)
>
> Synco said he was using a usbprog which does seem like a very complete
> programmer. My questions with this programmer are:
>  a) can it do 1-wire debug - I couldn't find anything on the the usbprog
> website to suggest so. If not, is there a DIY programmer that does?
>  b) How in the heck as a total C n00b do I use the jtag etc. meaningfully?
>  c) Did this come as a kit, is there a single sided version of the
> board... i.e what route to fabrication did you take.
>
> Synco, you also mentioned that instead of a dedicated debugger it is
> easier to pulse a pin or use a uart, I guess much the same as I was doing
> with the Butterfly LCD.
>
> Anyway, any other thoughts? especially as to how to use and how useful
> debugging is on these chips. I am using gcc-avr in a GNU/Linux environment.
>
> Cheers
>
> Jasper
>
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