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GraphLCD driver library

The serdisp driver
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Description
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The serdisp driver supports LC displays that are supported by
serdisplib (http://serdisplib.sourceforge.net).


Configuration Parameters
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The serdisp driver supports the following parameters in config file:

Controller
 Select the controller your LCD uses named like in serdisplib.
 Possible values: See README in serdisplib package

Device
 Instead of using the direct output via port address (see Port), you
 can use the parport device (/dev/parportX). The advantage over the
 direct output via port address is that this works for non-root users
 also. But it's a little bit slower. The modules ppdev.o, parport.o
 and parport_pc.o must be loaded or compiled into the kernel.

Port
 Sets the port address of the parallel port. If this parameter is not
 given, 0x378 is used. To use this direct output, the program that
 uses the driver library has to be started with user 'root'.

Width
 Sets the horizontal size of the display. If this parameter is not
 given, a default value according to the selected controller is used.

Height
 Sets the vertical size of the display. If this parameter is not
 given, a default value according to the selected controller is used.

UpsideDown
 Rotates the display output by 180 degrees. This might be useful, if
 the LCD is mounted upside-down.
 Possible values: 'yes', 'no'
 Default value: 'no'

Invert
 Inverts the display.
 Possible values: 'yes', 'no'
 Default value: 'no'

Contrast
 Sets the contrast of your display.
 Possible values: 0 <= x <= 10
 Default value: 5

Backlight
 Switches the backlight of your display on and off.
 Possible values: 'yes', 'no'
 Default value: 'yes'