11 Jul
2012
11 Jul
'12
12:35 a.m.
Hi Peter,
On Wed, Jul 11, 2012 at 12:11:59AM +0200, Peter Stuge wrote:
How about USB to the backplane if 12Mbps is enough throughput?
That might be an option, but it would require a cascade of USB hubs on the backplane, and it would prevent the boards from talking to each other in a peer-to-peer kind of fashion.
Also, as the Calypso itself doesnt' have USB, we'd need some kind of external USB device controller hooked up to the calyposo UART / SPI or even data/address bus.
Something like multi-master SPI would at leaset from a hardware point of view support that.
Also, in addition to whatever bus we may choose, we should always have some timing signals, so we can e.g. trigger events on board "B" by the TPU on board "A".
Regards, Harald
--
- Harald Welte laforge@gnumonks.org http://laforge.gnumonks.org/
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