looking for single-board computer with SPI slave port

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I am looking for a reputable single-board computer or development board
kit that has these features. any suggestions?

* can act as a SPI (synchronous serial port) slave with clock frequency
anywhere in the 5-12MHz range & has some kind of FIFO (so I don't have
to handle an interrupt for each incoming byte/word). This is the most
important requirement & I'm having a hard time finding docs on
single-board computers that meet it.

* has >= 16MB RAM onboard

* has SD card slot (compact flash acceptible but less preferable) &
cards are hot-pluggable

* has either an ethernet jack and/or USB device (fullspeed or
highspeed) jack. USB probably preferable; I want to plug this thing
into a PC to exchange data.

* has some kind of external address/data bus that I can hook up a few
things on a small daughterboard

* is likely to be around for at least 5 years

* has a decent software development environment that's not outrageously
expensive. Would prefer no OS or a simple RTOS, not WinCE.

* real-time-clock is a very-nice-to-have but I can probably live
without it.

* RS232 UART is a very-nice-to-have but I can probably live without it.

I've been looking at some PXA270 single-board computers, they seem like
they might a good fit, but can't find the documentation on whether it
can handle my SPI slave requirement. TI 5509A DSP evaluation board also
looks ok, and I'm familiar with Code Composer as the IDE, but my only
reservation is that it forces me to use USB (no ethernet, no UART
unless I put one on a daughterboard & connect it to CPU via parallel
interface).


Re: looking for single-board computer with SPI slave port

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Almost certainly will not meet your 5 year availability requirement.

Considered rolling something semi-custom out of an FPGA?


Re: looking for single-board computer with SPI slave port
www.compulab.com ?

snipped-for-privacy@s13g2000cwa.googlegroups.com...
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Re: looking for single-board computer with SPI slave port
Sorry : I mean www.compulab.co.il ?

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Re: looking for single-board computer with SPI slave port
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huh, funny you should mention that... I just found out my officemate is
working on a project (which has part purchasing lifetime requirements
more important than mine) using their PXA270 boards, I'll probably end
up going that route. SPI slave support seems to be ok up to 13MHz which
will probably work for me, now I just have to find out what they
offer/need for SPI framing signals.

larwe wrote:
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urk. I have essentially no resources; I need something I can buy and
spend my effort solely on software development. if I am lucky enough to
get help spinning a hardware board it would be for a small
daughterboard with a parallel DAC on it.


Re: looking for single-board computer with SPI slave port
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* requirements snipped *

The requirements you list don't seem to require a whole SBC.  I can think of
a few microcontrollers that would do this with a little work.  Are you
looking for something off the shelf simply because it's a one-off project or
a prototype of some kind?

What does it need to do besides move bytes between the SPI port and the
memory?
Would you be interested in having something custom made?  What quantities
and schedule do you have?

-Regards,

 Travis



Re: looking for single-board computer with SPI slave port
Has anyone out there used the Toradex Colibri module?


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