Note

StackChan uses the M5GFX library as its display driver. Refer to the APIs and examples below to implement basic display functionality. For more API details, refer to the M5GFX documentation.

Sample Program

Build Requirements

M5Stack board manager version >= 3.3.7
Board option = M5CoreS3
M5Unified library version >= 0.2.14
M5GFX library version >= 0.2.20

cpp 
#include <M5Unified.h>

void draw_function(LovyanGFX* gfx) {
    int x      = rand() % gfx->width();
    int y      = rand() % gfx->height();
    int r      = (gfx->width() >> 4) + 2;
    uint16_t c = rand();
    gfx->fillRect(x - r, y - r, r * 2, r * 2, c);
}

void setup() {
    auto cfg = M5.config();
    M5.begin(cfg);
    int textsize = M5.Display.height() / 60;
    if (textsize == 0) {
        textsize = 1;
    }
    M5.Display.setTextSize(textsize);
}

void loop() {
    int x      = rand() % M5.Display.width();
    int y      = rand() % M5.Display.height();
    int r      = (M5.Display.width() >> 4) + 2;
    uint16_t c = rand();
    M5.Display.fillCircle(x, y, r, c);
    draw_function(&M5.Display);
}

The example output is shown below. The program draws circles and rectangles of different colors at random positions on the screen:

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