Date: Sun, 29 Apr 2001 12:05:45 -0700 From: Mike Smith <msmith@freebsd.org> To: Shaun Dwyer <sldwyer@bigpond.com> Cc: "Patrick S. Gardella" <patrick@FreeBSD.ORG>, tdwyer@bigpond.com, freebsd-questions@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG Subject: Re: LCD driver port (Linux -> FreeBSD) needed for car-mp3 player Message-ID: <200104291905.f3TJ5j800935@mass.dis.org> In-Reply-To: Your message of "Sun, 29 Apr 2001 21:34:32 %2B0800." <3AEC1868.13FA5F62@bigpond.com>
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> Hi Patrick,
>
>
> I didn't really explain much about the LCD+Driver...
> Basically its a parallel port display that uses the generic Hitachi
> HD44780
> chipset. What the driver for linux does is provide a /dev/lcd
> that you can address the same as you would /dev/cuaaX for a serial
> matrix orbital display.
>
> The reason I am using the parallel port LCD, is that it cost $80,
> as opposed to $400+ for the matrix orbital serial display (I am in
> Australia).
Look at /usr/share/examples/ppi; you don't need (or want) a kernel driver
for this sort of thing. I wrote the ppilcd app to talk to exactly that
LCD controller; the electronics involved should be the same as for the
Linux interface.
If you have any questions, let me know. The code's a bit old, but the
ppi interface hasn't changed in the last four years.
--
... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also. But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view. [Dr. Fritz Todt]
V I C T O R Y N O T V E N G E A N C E
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