[Arm-netbook] EOMA-68 Carrier Board Concept

[joem]

On Thu, 2013-08-22 at 09:37 -0500, Christopher wrote:
> 
> 
> Sent from my iPhone
> 
> On Aug 22, 2013, at 8:37 AM, joem <joem at martindale-electric.co.uk>
> wrote:
> 
> 
> > On Wed, 2013-08-21 at 14:15 -0500, Christopher Thomas wrote:
> > > 
> > > > > 3. The EOMA68 (b/h)ackers already have info/knowledge on
> > >        the STM32x
> > > > > from the flying squirrel.
> > > 
> > > 
> > >         libopencm3 - LGPL'd - lots of other bits.  although to be
> > >        honest
> > >        having seen the MK20 which appears to have full-speed USB
> > >        *and* I2S
> > >        even in a 40-pin package @ $1.60 i'm kinda stunned and
> > > amazed.
> > > 
> > > 
> > > Not JUST FS USB, but OTG too. :) 
> > > 
> > > 
> > > The MK20DX Datasheet makes me feel all warm and gooey.
> > > http://cache.freescale.com/files/32bit/doc/data_sheet/K20P64M50SF0.pdf
> > 
> > I have go ahead to look for an alternative cortex ARM cpu for my
> > company.
> > 
> > I'm  trying to see if I can get an FRDM-K20D50M operational and use
> > that
> > to program up a MK20DX32VLF5. Is that even possible?
> > 
> 
> 
> Yes, as long as its a K20 or greater, you should be okay. 

Thanks for that - in that case I order it tomorrow.

> > Codewarrior (Eclipse derivative) is free up to 128k but when you try
> > to
> > download it, you have to wait for someone from freescale to make
> > contact
> > instead of click and download. I don't know what all that involves
> > so
> > I'm loosing time here to try things out.
> > 
> > Chris, could you share how you plan on getting a K20 code compiling
> > in
> > Linux and programming a chip with it? I could use this for the I2C
> > I/O
> > port expansion chip because its cheaper.
> > 
> > 
> 
> 
> I have a bus pirate and was planning on using this method. 
> 
> 
> https://github.com/mchck/mchck/wiki/Getting-Started
> 
> 
> Although I do wonder if it'll be possible to use an STM32 to program
> the MK20 over SDA/SWD

Hmmm.. How to bootstrap the mchck? He's got other stuff like bus blaster
to get the first bit of code into the mchck before he can use it
as a programmer to program other K20. May be I buy the MK20DX32VLF5
as mentioned and then also make the mchck - but as he has release KiCAD
files for it, I make it better with a fast enough opto isolator for
electrical isolation and GPL the lot. That would be handy for future
high voltage/motor projects! :) My company needs these to be opto
isolated for high voltage operation - so its probably going to get
funded as well.

Thanks for the note Chris.