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FAQ added new modules 'processor.c' contains all data processing git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@15 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
54 lines
2.5 KiB
Plaintext
54 lines
2.5 KiB
Plaintext
#
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# $Id: README.MatrixOrbital,v 1.2 2000/03/22 07:33:50 reinelt Exp $
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#
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This is the README file for the MatrixOrbital display driver for lcd4linux
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This driver supports the serial interface alphanumeric display modules by
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Matrix Orbital Corporation (http://www.matrixorbital.com).
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I could only test it with the LCD2041 model, but I think every other (LCD) model
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should work. These displays are supported:
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LCD0821: 2 lines by 8 characters
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LCD1621: 2 lines by 16 characters
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LCD2021: 2 lines by 20 characters
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LCD2041: 4 lines by 20 characters (tested)
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LCD4021: 2 lines by 40 characters
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I could not test the vacuum fluorescent display models, but I think they should work, too.
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There are no entries for this models in the driver table (at the bottom of MatrixOrbital.c),
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but they could be easily added.
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The displays come with an RS-232 and an I2C interface. The driver supports the RS-232 interface
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only (because I have no idea how to find the I2C bus on my motherboard).
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Power can be applied either via an external DC power supply, a modified floppy power connector
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(be aware that you can destroy your display if you get the pins wrong!) or via the RI (ring)
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signal of the RS-232 port. I choosed the latter, and modified a serial card so that it supplies
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+5V from the ISA bus to this pin (again, be aware that this is dangerous if you connect any other
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serial device to this modified port).
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The driver supports vertical, horizontal and split bars (two independent bars in one line),
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all bar types can be used simultanously. As the displays only have 8 user-defined characters,
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the needed characters to display all the bars must be reduced to 8. This is done by replacing
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characters with similar ones. To reduce flicker, a character which is displayed at the moment,
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will not be redefined, even if it's not used in this run. Only if the character compaction
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fails, this characters will be redefined, too.
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The displays have a GPO (general purpose output), where you can connect a LED or something.
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The driver supports controlling this GPO, but this function is unused by now.
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Configuration:
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The driver needs/supports the following entries in lcd4linux.conf:
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Display: a valid Matrix Orbital Display name (e.g. "LCD2041")
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Port: serial device the display is attached to (e.g. /dev/ttyS2)
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Speed: the baud rate from the display (configured via jumpers) must match
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this value. Possible values are 1200, 2400, 9600 and 19200
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Contrast: sets the LCD display contrast to a level between 0 (light)
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and 256 (dark). Default value: 160
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