Re: [avrdude-dev] Hacking avrdude to add a new bit-banging programming mechanism..

[Gordon Henderson]

On Wed, 13 Jun 2012, Joerg Wunsch wrote:

> As Gordon Henderson wrote:
>
> > I've not checked to see if these patches are in later versions, but if
> > not, then do consider them for inclusion!
>
> Due to many recent changes, the patch no longer applies in any way:
>
> % patch -p1 < /tmp/avrdude-5.10-bb-gpio.patch
> patching file ac_cfg.h.in
> Hunk #1 succeeded at 60 (offset 21 lines).
> patching file avrdude.conf.in
> Hunk #1 succeeded at 1081 (offset 280 lines).
> patching file config_gram.y
> Hunk #1 FAILED at 39.
> Hunk #2 FAILED at 100.
> Hunk #3 succeeded at 622 with fuzz 2 (offset 183 lines).
> 2 out of 3 hunks FAILED -- saving rejects to file config_gram.y.rej
> patching file configure.ac
> Hunk #1 succeeded at 259 (offset 88 lines).
> Hunk #2 FAILED at 339.
> 1 out of 2 hunks FAILED -- saving rejects to file configure.ac.rej
> patching file gpio.c
> patching file gpio.h
> patching file lexer.l
> Hunk #1 FAILED at 146.
> 1 out of 1 hunk FAILED -- saving rejects to file lexer.l.rej
> patching file Makefile.am
> Hunk #1 FAILED at 101.
> 1 out of 1 hunk FAILED -- saving rejects to file Makefile.am.rej
>
> We've already been discussing this.  If the patch is made work with
> the current SVN tree, and accompanied by documentation patches, I
> promised to include it.

OK. If I have time I'll have a look, but it won't be for a week, maybe 2.

FWIW: I'm working on a little board to go with the Raspberry Pi and it's 
working very well now - I can use avrdude on the Pi to program up an 
ATmega on my board using 4 of it's GPIO pins using the bit-banging GPIO 
programmer. I initially looked at using the Pi's serial port, and that 
worked OK via the Arduino IDE (using one of the Pis GPIO lines to reset 
the ATmega), however since it's all running at 3.3v, the max clock on the 
ATmega is 12MHz, so the standard arduino bootloaders needed recompiling to 
work at that speed - which I did and tested, but then there's the hassles 
of burning the bootloader (hole in bucket syndrome :)

My plan now is to apply the patch to the Debian version of avrdude 
(happens to be 5.10 too), then build a new debian package of avrdude to 
run on the Pi which will integrate nicely with the Arduino IDE (which I 
don't personally use, but I hear it's quite popular!)

Thanks again,

Gordon