30 lines
993 B
Markdown
30 lines
993 B
Markdown
# LCD Driver
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This is eventually gonna be a kernel module capable of sending text to a connected LCD display.
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The communication would be happening via device file `/dev/lcd`
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Installing the module creates the device `/dev/lcd` used for sending text to the screen. The LCD display
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is turned on by opening the file for writing. A string of characters has to be ended with `\n` in order to
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appear on the display.
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This is the circuit I used to drive my screen:
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This is also the default pin layout used by the driver. If you want to use a different pin layout, you can change the driver's config as such:
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sudo ./install.sh pin_name=pin_number ...
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where `pin_name` is one of the following:
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* `pin_power`
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* `pin_rs`
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* `pin_rw`
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* `pin_enable`
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* `pin_data`
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and `pin_number` is the GPIO pin number. For `pin_data` you need to supply a comma-separated list of four numbers.
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## How to build
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Good luck.
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## How to use
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Probably better to just not use it. |