GitHub - geertu/hd44780: HD44780 LCD driver (Linux user+kernel)

geertu / hd44780 Public

Notifications You must be signed in to change notification settings
Fork 1
Star 3

HD44780 LCD driver (Linux user+kernel)

Notifications

Name		Name	Last commit message	Last commit date
Latest commit History 30 Commits
Makefile		Makefile
README		README
README.private		README.private
hd44780.c		hd44780.c
hd44780.h		hd44780.h
lcdcon.c		lcdcon.c
parlcd.c		parlcd.c
parlcd.h		parlcd.h
play.c		play.c

Repository files navigation

This is a Linux console driver for a HD44780 LCD connected to a PC-style
parallel port. It supports both 4-bit and 8-bit interface mode.

The code was developed and used with a 20x4 LCD connected to the parallel port
of a standard PC and a CHRP LongTrail PowerPC box, with Linux kernel 2.2
(early development) and 2.4, from 2000 until 2004. There's no guarantee it will
work with more recent kernels.

The console driver has a comment suggesting to use a 20x4 window on an 80x25
virtual screen, but this has never been implemented.

It consists of 4 modules:
  - hd44780: Mid-level HD44780 LCD driver, handling the HD44780 commands
             [kernel, user]
  - parlcd: Low-level HD44780 driver, defining how to talk to a HD44780 LCD
            connected to a PC-style parallel port [kernel, user]
  - lcdcon: Standard Linux console driver for a HD44780 LCD [kernel]
  - play: Interactive test program to talk to the HD44780 or to the raw
          parallel port [user]

Modules marked [kernel] are used inside the Linux kernel only.
Modules marked [user] are used with the userspace test program.

Have fun!

Geert Uytterhoeven <[email protected]>
2010-07-26