Unit MiniOLED Arduino Tutorial

#include <M5Unified.h>
#include <M5GFX.h>
#include <M5UnitMiniOLED.h>
 
M5UnitMiniOLED display(2, 1, 400000);  // SDA, SCL, FREQ
 
M5Canvas canvas(&display);
 
static constexpr char text[]    = "Hello world ! Hello Unit MiniOLED ! ";
static constexpr size_t textlen = sizeof(text) / sizeof(text[0]);
int textpos                     = 0;
int scrollstep                  = 2;
 
void setup(void)
{
    M5.begin();
    M5.Display.setFont(&fonts::lgfxJapanMinchoP_32);
    M5.Display.setTextDatum(middle_center);
    M5.Display.drawString("Unit MiniOLED Test", M5.Display.width() / 2, M5.Display.height() / 2);
 
    display.init();
    display.setRotation(1);
    canvas.setColorDepth(1);  // mono color
    canvas.setFont(&fonts::lgfxJapanMinchoP_16);
    canvas.setTextWrap(false);
    canvas.setTextSize(2);
    canvas.createSprite(display.width() + 64, 72);
}
 
void loop(void)
{
    int32_t cursor_x = canvas.getCursorX() - scrollstep;
    if (cursor_x <= 0) {
        textpos  = 0;
        cursor_x = display.width();
    }
 
    canvas.setCursor(cursor_x, 20);
    canvas.scroll(-scrollstep, 0);
    while (textpos < textlen && cursor_x <= display.width()) {
        canvas.print(text[textpos++]);
        cursor_x = canvas.getCursorX();
    }
    display.waitDisplay();
    canvas.pushSprite(&display, 0, (display.height() - canvas.height()) >> 1);
}