gnupic: Re: [gnupic] MPLAB ICD2
Subject:
Re: [gnupic] MPLAB ICD2
From:
Sylvain Giroudon ####@####.####
Date:
20 Apr 2005 08:26:06 +0100
Message-Id: <1113982218.3973.14.camel@raoul>
I am afraid it won't be that simple.
The current design goes at the lowest level, i.e. at the PGC/PGD driving
level. The hw configuration deals with this level on parports only. No
messages are actually exchanged; it is only a matter of writing/reading
parport signals.
The ICD2 interface works with command/reply messages transmitted through
USB, which are at a higher processing level. This level would propably
be addressed in the lib/icd.c file.
We could split the work into two part:
(1) Reverse-engineering, understanding and documenting the ICD
USB/serial messages; a work that anybody could do.
(2) Then I can take some time to add support for USB/serial interfaces
into GPICD. Maybe I could start defining the framework (the skeleton),
in order for other people to easily add some processing code (the meat).
Regards,
Sylvain
On Wed, 2005-04-20 at 10:44, Iain Dooley wrote:
> okay, so potentially, i could get into the code and modify it to run with the ICD2 USB programmers that the university already owns? if i started to do this, would you be able to provide me with advice along the way? i've got a few other projects on at the moment, but this would be pretty interesting.
>
> where would i start? is there some standard specification for messages sent to an ICD device? when you say 'the hardware signals are configurable', does this mean that i could potentially just add in a module to GPICD that sends over serial instead of parallel and then configure the hardware signals to conform to any serial/USB device as per required?
>
> cheers
>
> iain
>
> Sylvain Giroudon wrote:
> > I use the home-made hardware interface described in the GPICD web site.
> > The hardware signals are all configurable, in order to potentially use
> > any parallel port base ICSP interface. The most famous is probably the
> > one described in the Microchip app note AN589, available from the
> > microchip web site.
> >
> > Sylvain
> >
> > On Tue, 2005-04-19 at 21:23, b1qpkf62 wrote:
> >
> >>What hardware do you use with GPICD? Can you provide a URL to one that is
> >>pre-built?
> >>Thanks,
> >>Frank
> >>
> >
> >
> >
> >
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