# The glk Driver

This section talks about using LCDproc with LCD displays that use the Matrix Orbital GLK and GLC chipset.

## Supported devices

Currently the drivers supports the following devices:

- GLC12232 (20x4)

- GLC12864 (20x8)

- GLC128128 (20x16)

- GLC24064 (40x8)

- GLK12232-25 (20x4)

- GLK12232-25-SM (20x4)

- GLK12864-25 (20x8)

- GLK128128-25 (20x16)

- GLK24064-25 (40x8)

Modules not in the list above are not recognized and the driver will not load if it encounteres an unrecognized display.

## Configuration in LCDd.conf

### [glk]

`Device` = ``DEVICE``

- select the serial device to use [default: `/dev/lcd`]

`Contrast` = ``CONTRAST``

- Set the initial contrast. Legal values for `CONTRAST` are `0` - `1000`. If not given, it defaults to `560`.

`Speed` = { ``9600`` | ``19200`` | ``38400`` }

- Set the the baud rate for communication with the LCD. The default is `19200`.