[lcdproc] 4 * 40 LCDisplay supported??

[McMeikan, Andrew]

Hi Sven,
	Yes you need an extra pin.  if you can put up with top and bottom
half showing the same you could just join E1 and E2 together.  A copy =
of
what I have done so far is available at
http://members.xoom.com/andrewmuck/LCD.htm this drives the extra E line
during init but doesn't yet write chars to the other half.

just uncomment the line that reads //#define SECONDLCDEN 128
then connect the sencond E line to pin 9

let me know how you go.

	cya,	Andrew...


> -----Original Message-----
> From:	Sven L=FCbke [SMTP:S-O.Luebke@FH-Wolfenbuettel.DE]
> Sent:	Friday, October 29, 1999 8:36 PM
> To:	Scott Scriven
> Cc:	LCDproc list
> Subject:	Re: [lcdproc] 4 * 40 LCDisplay supported??
>=20
> At 09:21 28.10.99 -0600, you wrote:
> >On Thu, 28 Oct 1999, Sven L=FCbke wrote:
> >
> >> I plan to buy a 4 * 40 char LCDisplay (not a Matrix Orbital
> >> one) with a HD44780 chip onboard. I heard that these displays
> >> have two "E" pins. Is this display suppoerted by LCDProc?? If
> >> no, what will happen if I only connect the one E pin first??
> >> Is it possible to support these displays in the future?? Thanx
> >> for answering questions...
> >
> >The 40x4 HD44780 displays are not supported.  They will be, as
> >soon as someone writes a driver which can handle it, though.
>=20
> This requires an extra pin of the parallel port or is there
> any other possibility??
>=20
> >The screen is split in half, with a separate controller for
> >each half.  This makes things somewhat complex; and the display
> >is generally slow anyway.
>=20
> Split in half?? In which way?? First two lines are activated, which
> would be okay or any other combination?? If it's the first, I think
> I would buy a 4 x 40 display and leave the second E pin unconnected.
> Will this work??
>=20
> >On the bright side, I just added support for arbitrary display
> >sizes.  Not everything works well on strange sizes, but the
> >server at least knows a little about how to deal with it.
>=20
> How does the Hitachi chip works?? If I set E1 high (or low) I enable
> the first two lines and if I set E2 high (or low) I enable the
> last two lines?? That would be the easiest way, but it won't be that
> simple?
>=20
> Thanx
>=20
> Sven
>=20
>=20
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