## $Id: README.Drivers,v 1.4 2001/03/09 13:08:11 ltoetsch Exp $#How to write new display drivers for lcd4linuxIf you plan to write a new display driver for lcd4linux, you should followthis guidelines:* use Skeleton.c as a start point.  You might also have a look at Text.c* create a new sourcefile <drivername>.c and add it to the bottom of  Makefile.am* add an entry to configure.in* there's no need for a <drivername>.h* create one (or more) unique display names (your driver will be selected by  this name in the 'Display'-line of lcd4linux.conf).* include "display.h" in your driver, to get the LCD structure and various   BAR_ definitions* include "cfg.h" if you need to access settings in the config file.* create a LCD table at the bottom of your driver, and fill it with the  appropriate values. Take care that you specify the correct bar capabilities  of your display or driver:  BAR_L:  horizontal bars headed left  BAR_R:  horizontal bars headed right  BAR_H2: driver supports horizontal dual-bars  BAR_U:  vertical bars bottom-up  BAR_D:  vertical bars top-down  BAR_V2: driver supports vertical dual-bars* edit display.c and create a reference to your LCD table:     external LCD YourDriver[];* extend the FAMILY table in display.c with your driver:     FAMILY Driver[] = {       { "Skeleton",      Skeleton },       { "MatrixOrbital", MatrixOrbital },       { "YourFamily",    YourDriver },       { "" }     };* write the correspondig init(), clear(), put(), bar(), quit() and  flush()-functions. There's no need to use a framebuffer and display its  contents with the flush()- call (as in MatrixOrbital.c), you can directly  write to the display in the put()- and bar()-functions, and use an empty  flush()-function. But if you have a limited number of user-defined  characters, and therefore you have to do some sort of 'character reduction'  or similar stuff, you will have to use a framebuffer and the flush()-call.