pimoroni-pico/libraries/pico_scroll/pico_scroll.hpp

#include <string>
#pragma once

namespace pimoroni {

  class PicoScroll {
  private:
    static const uint8_t DEFAULT_ADDRESS = 0x74;
    static const uint BUFFER_SIZE = 144;
  public:
    static const int WIDTH = 17;
    static const int HEIGHT = 7;
    static const uint8_t A = 12;
    static const uint8_t B = 13;
    static const uint8_t X = 14;
    static const uint8_t Y = 15;

  private:
    uint8_t __fb[BUFFER_SIZE];
  
  public:
    void init();
    void update();
    void set_pixels(const char *pixels);
    void set_bitmap_1d(const char *bitmap, size_t bitmap_len, int brightness, int offset);
    void scroll_text(const char *text, size_t text_len, int brightness, int delay_ms);
    void scroll_text(std::string text, int brightness, int delay_ms=100) {
      scroll_text(text.c_str(), text.length(), brightness, delay_ms);
    };
    void set_text(const char *text, size_t text_len, int brightness, int offset);
    void set_text(std::string text, int brightness, int offset=0) {
      set_text(text.c_str(), text.length(), brightness, offset);
    }
    void set_pixel(uint8_t x, uint8_t y, uint8_t v);
    void clear();
    bool is_pressed(uint8_t button);

  private:
    void i2c_write(uint8_t reg, const char *data, uint8_t len);
  };

}