On 6/06/12 8:48 AM, Tomek CEDRO wrote:
> Okay, I can see there is major of interest in the subject of
> OpenOCD-BOX, this is good, thanks :-)
>
I'm pretty keen too!
>
> Buffer should allow to input/output/tristate lines connected to a
> target device and shift voltage levels safely between interface
> hardware and target system - {1.8, .., 5V} would be fine..? Something
> as presented in KT-LINK, maybe this design can be reused with author
> permission..? Anyone has experience in such designs and want to take
> the challenge? :-)
And I've dealt with plenty of buffers, they're pretty straightforward.
>
> I have received Carambolla today, but I will have time to play with it
> with start of July, until then its hell on earth for me :-(
I've got a Carambola coming in the mail, this is certainly one
potentially great use for it, depending on it's IO speed. I'm not sure
whether bit bang io on it will be very good or not, may need to run the
jtag interface through an fpga, although that does complicated coding,
not to mention firmware updates.
I've also got a custom board I designed for work, it's primary purpose
is as a usb analog video capture device, but it's based on an lpc3131
(arm9, 180mhz, High speed USB, quite cheap) and an actel a3p060 fpga.
I don't have enough pins from the fpga wired out to a header to easily
using it for this, but I could rip off the analog converter chip and tap
into it's pins to give me plenty of fpga free pins.
I've been thinking of having a go at this, akin to simonqian's post from
a few of days ago. I don't have any off chip ram however, so I'm not
going to be using linux - but it comes with a rather large set of
example firmware for bare metal coding (which I used for the vdeo
converter), and there's nuttx is available for it which would give me an
tcp stack to play with etc. Off the top of my head, I reckon a fully
built version of this board (once design is customised to suit this
purpose) could be sold for $150 - $200 - as such I'm far more inclined
to use a carambola!
I like the idea of making it a usb network device, hadn't thought of
that one earlier.
Cheers,
Andrew
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