Writing to parallel port
malcolm.kay at internode.on.net
Fri Jul 25 20:12:18 PDT 2003
On Sat, 26 Jul 2003 03:12, Daan Vreeken [PA4DAN] wrote:
> On Friday 25 July 2003 19:22, Mark wrote:
> > Hello,
> > Has anyone an idea how to set/unset a bit on a parallel port in freebsd
> > 4.7? I installed Device::ParallelPort from CPAN (Perl 5.8.0), but that
> > does nothing (seems made for linux).
> > Or if someone could point me to a little c-source, that would be helpful
> > too; all I need is to toggle a bit to switch a relay.
> Have a look at this piece of code if wrote :
> It's a very small udp network daemon to control my roomlights over the LAN.
> Basically you need to open /dev/io to get io read/write permission, after
> that you are free to bang all IO-ports you want.
Generally you still need to be root or have root privilege to do this; but
might vary with different FreeBSD releases.
An alternative that may or may not suit your needs is ppi device access to
parallel ports eg /dev/ppi0; try:
# man ppi
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