103 lines
3.2 KiB
103 lines
3.2 KiB
# LED-AlphaSquare
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An alphabet for your per-key LEDs, `AlphaSquare` provides a way to display 4x4
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"pixel" symbols on your keyboard. With this building block, one can build some
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sweet animations, or just show off - the possibilities are almost endless!
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## Using the plugin
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To use the plugin, one needs to include the header in their Sketch, tell the
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firmware to `use` the plugin, and one way or another, call the `display` method.
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This can be done from a macro, or via the `AlphaSquareEffect` LED mode.
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```c++
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#include <Kaleidoscope.h>
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#include <Kaleidoscope-LEDControl.h>
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#include <Kaleidoscope-LED-AlphaSquare.h>
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KALEIDOSCOPE_INIT_PLUGINS(LEDControl,
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AlphaSquare,
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AlphaSquareEffect);
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void setup() {
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Kaleidoscope.setup();
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AlphaSquare.display (Key_A);
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}
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```
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## Plugin methods
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The plugin provides the `AlphaSquare` object, which has its methods and
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properties listed below, and an `AlphaSquareEffect` LED mode, which has no
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methods or properties other than those provided by all LED modes.
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### `.display(key)`
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### `.display(key, col)`
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### `.display(key, key_addr)`
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### `.display(key, key_addr, color)`
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> Display the symbol for `key` at the given led address, with pixels set to
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> the specified `color`. If only `col` is provided, the first row - `0` is assumed. If
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> the column is omitted, then the third column - `2` - is used.
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> If the `color` is omitted, the plugin will use the global `.color` property.
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>
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> The plugin can display the English alphabet, and the numbers from 0 to 9. The
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> symbol will be drawn with the top-left corner at the given position.
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>
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> Please consult the appropriate hardware library of your keyboard to see how
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> keys are laid out in rows and columns.
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### `.display(symbol)`
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### `.display(symbol, col)`
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### `.display(symbol, key_addr)`
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### `.display(symbol, key_addr, color)`
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> As the previous function, but instead of a key, it expects a 4x4 bitmap in
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> the form of a 16-bit unsigned integer, where the low bit is the top-right
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> corner, the second-lowest bit is to the right of that, and so on.
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>
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> The `SYM4x4` macro can be used to simplify creating these bitmaps.
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### `.clear(key)`, `.clear(symbol)`
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### `.clear(key, col)`, `.clear(symbol, col)`
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### `.clear(key, key_addr)`, `.clear(symbol, key_addr)`
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> Just like the `.display()` counterparts, except these clear the symbol, by
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> turning the LED pixels it is made up from off.
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### `.color`
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> The color to use to draw the pixels.
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>
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> Defaults to `{ 0x80, 0x80, 0x80 }` (light gray).
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## Plugin helpers
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### `SYM4x4(...)`
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> A helper macro, which can be used to set up custom bitmaps. It expects 16
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> values, a 4x4 square of zeroes and ones. Zeroes are transparent pixels, ones
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> will be colored.
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## Extra symbols
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There is a growing number of pre-defined symbols available in the
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`kaleidoscope::plugin::alpha_square::symbols` namespace. Ok, growing may have
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been an exaggeration, there is only one as of this writing:
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### `Lambda`
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> A lambda (`λ`) symbol.
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## Dependencies
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* [Kaleidoscope-LEDControl](Kaleidoscope-LEDControl.md)
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## Further reading
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Starting from the [example][plugin:example] is the recommended way of getting
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started with the plugin.
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[plugin:example]: /examples/LEDs/LED-AlphaSquare/LED-AlphaSquare.ino
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