Re: [avrdude-dev] [RFC] XMEGA PDI programming with a AM335x processor

[Andy Simpkins]

Hi Again,

So I have had no comments / responce to this thread.  Can I safely 
assume that nobody has any views either way?  In wich case I shall ask 
Enric to prepare and submit a patch to the package.

In summary this will allow systems based around Ti's AM335x series of 
SoC (such as the BeagleBone Black series) to program PDI in much the 
same way as you can already use GPI bit bash for SPI based In System 
Programming.

Best Regards

/Andy


On 08/03/2017 09:43, Andy Simpkins wrote:
> Hi all.
>
> I am using Enric's XMEGA PDI programming support using the 
> Programmable Real-time Unit (PRUSS) available on AM335x based boards 
> on our hardware platform at work, and on BBB at home, and think this 
> would benefit other users as well.
> What do we need to do to include this functionality within the awesome 
> AVRDude?
>
> Best regards
>
> /Andy
>
> Disclaimer: The company I work for was responsible for asking Enric to 
> carry out this work.  We find this an invaluable extension to AVR dude 
> (our platform has several AVRs performing real time / MCU accelerated 
> tasks outside the control of our host system) initially program all 
> firmware form the host OS (in this case a Debian based Linux distro) 
> on the platform without needing external programmers saves a lot of 
> time and effort during production AND more importantly we can also 
> update units in the field.  We produce communication and accessibility 
> aids for people with disabilities.  This platform is a speech 
> synthesiser for people with no voice.
>
> On 12/02/2017 22:01, Enric Balletbo i Serra wrote:
> > Hi again,
> >
> > Just a quick note that finally I found the problem, as I supposed the 
> > problem was in the PRU firmware, to be more exact, the problem was 
> > due I was using an old PRU compiler. I just updated my repository 
> > with latest changes for if someone finds it useful and wants to test.
> >
> > Thanks,
> >    Enric
> >
> >
> > On 29/01/17 12:53, Enric Balletbo i Serra wrote:
> > > Dear all,
> > >
> > > This is a request for comments.
> > >
> > > I've been working on add XMEGA PDI programming support using the 
> > > Programmable Realtime Unit (PRUSS) available on AM335x based boards 
> > > like Beaglebone Black. With this you can program an XMEGA in-circuit 
> > > without requiring any external hardware. The programmer needs a 
> > > custom firmware that needs to be loaded to the PRU [1], avrdude 
> > > loads the firmware and communicates with it to be able to program 
> > > the firmware on XMEGA, the code is available here [2] and the 
> > > specific commit that adds support for it is here [3]. It works doing
> > >
> > >   avrdude -p atxmega16d4 -c pruss -e -U flash:w:my-firmware.hex
> > >
> > > But there is still an issue that I need to solve, though I have a 
> > > workaround to make it work. I'm pretty sure that the problem is in 
> > > the PRU firmware side so not a problem with avrdude. Nevermind if 
> > > you want to help test, review or give me your comments all are 
> > > welcome. Do not hesitate to contact me if you are interested on 
> > > this, either by email or in the irc (nickname eballetbo). I hope 
> > > have a stable version soon but meanwhile, I repeat, if anyone would 
> > > like to test all feedback is welcome.
> > >
> > > Best regards,
> > >
> > >   Enric
> > >
> > >
> > > [1] https://github.com/eballetbo/pdi-pruss
> > > [2] https://github.com/eballetbo/avrdude
> > > [3] 
> > > https://github.com/eballetbo/avrdude/commit/ba3cb893cf3931033faeb4ebe0c296842f168cc7
> > >
> > >
> > >
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