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Hi Francis, There already are several drivers for this display, why write another one ? One I use and know (because I wrote it :-)) is available here : http://linux.exosec.net/kernel/lcdpanel/ It works with any combination of data and control bits from a parallel port, and can initialize early in the kernel to display a booting message. It also supports a keypad. I know that several appliance makers who use it. It uses /dev/lcd to send data and some ANSI codes to move the cursor, and to define up to 8 graphics characters. It uses /dev/keypad for keypad input. Another one exists, I don't remember its name but it used to be announced on freshmeat. It emulates a vt52 terminal IIRC. Hoping this helps, Willy On Sun, May 08, 2005 at 12:33:30PM +0200, moreau francis wrote: > Hi, > > I'm trying to write a lcd driver for a HD44780 compatible display. > Basicaly it will be the only screen available on my linux board. > My problem is that I don't know which desgin I should use when > implementing the lcd's driver, because several choices are possible: > > 1) implementing a dumb char device "/dev/lcd" > 2) implementing a console driver > 3) implementing a tty driver > > I can't find any documentation on vt that makes the choice quite > hard but when looking at the code it may be the best choice for > user-space. Do you think it's the good direction ? > > Thanks for your advices, > > Francis. > > > > > > > __________________________________________________________________ > Découvrez le nouveau Yahoo! Mail : 250 Mo d'espace de stockage pour vos mails ! > Créez votre Yahoo! Mail sur http://fr.mail.yahoo.com/ > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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