Serial interfaces (was Re: Any former Psion 5 owners out there?)
ard at p850ug1.demon.co.uk
Fri Jul 23 14:16:01 CDT 2010
> > Just out of curiousity, do the USB-parallel adapters support all the
> > low-level bit-twiddling that you can do on a real PC printer port? Can
> > you treat them as 12 digital outputs and 5 inputs?
> Not as far as I can tell - they are printer interfaces, not GPIO. I
> have never considered them a replacement for a real parallel port, but
I see.... So considering all the things I (and others) have made that
link to PC parallel ports and which _don't_ use the centronics protocol,I
can think of yet another reason not to downgrade to a modern PC.
> I didn't bring them up because the OP was comparing RS-232 (and stop
Sure... It's called topic-drift :-)
> bits, parity, baud rate, handshaking, etc) vs USB attached devices.
Actually, do the USB-RS232 adapters (I refuse ot say USB-serial, since
there are many, many serial interfaces, including USB itself) allow you
to do all you can do with aa PC Async port? Like setting odd baud rates?
Or 5 bit mode (yes, I do sometimes want to talk to ta Creed 7)
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