23 Jul
2010
23 Jul
'10
11:51 a.m.
On 7/23/10, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
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 didn't bring them up because the OP was comparing RS-232 (and stop
bits, parity, baud rate, handshaking, etc) vs USB attached devices.
-ethan
On Tue, 20 Jul
2010 10:15:46 -0400
Ethan Dicks <ethan.dicks at gmail.com> wrote:
> It takes hundreds of cycles and more to
> move a simple message, it's a host-based, not bi-directional design,
> and it's only available on somewhat newish kit.
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?