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.
DONEpulse
Pulses on completion.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
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);
}