draw-pixel

wayland/ssd1306-oled-i2c/draw-pixel

Draw a pixel.
draw-pixel
@/draw-pixel
Draw a pixel.
DEV@/ssd1306-oled-i2c-device
An SSD1306 OLED device.
Xnumber
Cursor x coordinate.
Ynumber
Cursor y coordinate.
COLOURnumber
Colour of pixel. Options: 0 = black; 1 = white; 2 = invert.
UPDpulse
Update. Trigger write to display buffer.
draw-pixel
DEV
X
Y
COLOUR
UPD
DONE
DONEpulse
Pulses on completion.
To use the node in your project you should have the wayland/ssd1306-oled-i2c library installed. Use the “File → Add Library” menu item in XOD IDE if you don’t have it yet. See Using libraries for more info.

C++ implementation

struct State {
};

{{ GENERATED_CODE }}

void evaluate(Context ctx) {
    // The node responds only if there is an input pulse
    if (!isInputDirty<input_UPD>(ctx))
        return;

    // Get a pointer to the `Adafruit_SSD1306` class instance
    auto display = getValue<input_DEV>(ctx);

    auto x = getValue<input_X>(ctx);
    auto y = getValue<input_Y>(ctx);
    auto colour = getValue<input_COLOUR>(ctx);

    display->drawPixel(x, y, colour);

    emitValue<output_DONE>(ctx, 1);
}