On Oct 6, 2008, at 4:48 PM, Damian Stewart wrote:
David Kirkpatrick wrote:
Hi Peter,
The Open DMX has stability problems and the fading is jolty sometimes. Something to do with not being able to store an entire DMX frame at the same time I think. I read an article a while ago that explained the exact differences, but I can't seem to find it again.
actually, the Open DMX is just a standard FTDI-based USB to serial
adapter with the outputs wired into a 5-pin DMX plug. in other words, you
could achieve exactly the same with a standard serial port, wiring up the
RX/TX lines into the right pins. this is all the Open DMX is on the
inside. the system driver takes care of the timing, and doesn't do a very good
job of it at all.definitely go with the Pro.
USB serial have pretty crappy timing in general, from my experience.
I have banged my head against the FTDI driver quite a bit while
working on Firmata. If you need really tight timing, go with a real
serial port.
.hc
-- damian stewart | skype: damiansnz | damian@frey.co.nz frey | live art with machines | http://www.frey.co.nz
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