Parallel port control with USB->Parallel converter
c d saunter
christopher.saunter at durham.ac.uk
Thu Feb 14 16:18:34 CET 2008
It's been a while since I used these.
I was slightly wrong; actually both the 232 and 245 devices can be
accessed either via a serial port interface (COMx on windows, /dev/??? on
linux etc.) or via a direct API.
The 245 provides a parallel FIFO and the 232 a serial data link, so you'd
want the 245.
c d saunter (christopher.saunter at durham.ac.uk) wrote:
: I don't know about the USB parallel port converters but there are
: variousways you can add USB connectivity yourself.
: A simple way are the USB devices from FTDI
: Either the FT232R or the FT245R. These are both single chip solutions
: that provide a USB interface on one side and an 8 bit bi-directional fifo
: on other. The 232 is mapped as a serial port at the system level, whilst
: the 245 is higher bandwidth and accessed through an API (use ctypes etc.)
: Windows, Linux & Mac OS X are supported.
: FTDI provide evaluation modules (tiny, USB powered) that you can be up and
: running with in no time:
: Good luck!
: Soren (soren.skou.nielsen at gmail.com) wrote:
: : Hi,
: : I want to control some motors using the parallel port.. however, my
: : laptop does not have any parallel ports (very few do). What I do have
: : is a USB->Parallel converter... I thought about using PyParallel, but
: : the USB->Parallel converter doesn't actually map to the LPT port ..
: : and PyParallel only looks for LPT ports?
: : Has anyone tried doing this? What are my options for controlling
: : parallel connections on a laptop with no parallel port?
: : I also thought about controlling the USB natively.. but since I dont
: : have any instructions on how to do this with my Velleman USB->Parallel
: : port converter... i guess I would be totally blind.
: : Any help would be appreciated!
: : Soren
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