Arduboy.h

#ifndef Arduboy_h
#define Arduboy_h

#include "utility/core.h"
#include <SPI.h>
#include <Print.h>
#include <limits.h>

// EEPROM settings
#define EEPROM_VERSION 0
#define EEPROM_BRIGHTNESS 1
#define EEPROM_AUDIO_ON_OFF 2

// we reserve the first 16 byte of EEPROM for system use
#define EEPROM_STORAGE_SPACE_START 16 // and onward

// eeprom settings above are neded for audio
#include "utility/audio.h"

#define PIXEL_SAFE_MODE

// compare Vcc to 1.1 bandgap
#define ADC_VOLTAGE (_BV(REFS0) | _BV(MUX4) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1))
// compare temperature to 2.5 internal reference and _BV(MUX5)
#define ADC_TEMP (_BV(REFS0) | _BV(REFS1) | _BV(MUX2) | _BV(MUX1) | _BV(MUX0))

class Arduboy : public Print, public ArduboyCore
{
public:
  Arduboy();

  /// Returns true if the button mask passed in is pressed.
  /**
   * if (pressed(LEFT_BUTTON + A_BUTTON))
   */
  boolean pressed(uint8_t buttons);

  /// Returns true if the button mask passed in not pressed.
  /**
   * if (notPressed(LEFT_BUTTON))
   */
  boolean notPressed(uint8_t buttons);

  /// Initializes the hardware
  void begin();
  /// Initializes the hardware (but with no boot logo)
  void beginNoLogo();
  void start() __attribute__ ((deprecated, warning("use begin() instead")));

  /// Scrolls in the Arduboy logo
  void bootLogo();

  /// Boot utils such as flashlight, etc
  void inline bootUtils() __attribute__((always_inline));

  /// Clears display.
  void clear();
  void clearDisplay() __attribute__ ((deprecated, warning("use clear() instead")));

  /// Copies the contents of the screen buffer to the screen.
  /**
   * X and Y positions on the display are from the top left corner, thus a Y of 64
   * is the bottom of the screen and an X of 128 is the right side of the screen.
   * "Color" or "value" means choosing whether a pixel is lit or not - if color is
   * 0, the pixel is off (black), if color is 1, the pixel is on (white).
   */
  void display();

  /// Sets a single pixel on the screen buffer to white or black.
  void drawPixel(int x, int y, uint8_t color);

  uint8_t getPixel(uint8_t x, uint8_t y);

  /// Draw a circle of a defined radius.
  /**
   * Draws a circle in white or black. X and Y are the center point of the circle.
   */
  void drawCircle(int16_t x0, int16_t y0, uint8_t r, uint8_t color);

  /// Draws one or more "corners" of a circle.
  void drawCircleHelper(int16_t x0, int16_t y0, uint8_t r, uint8_t cornername, uint8_t color);

  /// Draws a filled-in circle.
  void fillCircle(int16_t x0, int16_t y0, uint8_t r, uint8_t color);

   /// Draws one or both vertical halves of a filled-in circle.
  void fillCircleHelper(int16_t x0, int16_t y0, uint8_t r, uint8_t cornername, int16_t delta, uint8_t color);

  /// Draws a line between two points.
  /**
   * Uses Bresenham's algorithm.
   */
  void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint8_t color);

  /// Draws a rectangle of a width and height.
  void drawRect(int16_t x, int16_t y, uint8_t w, uint8_t h, uint8_t color);

  /// Draws vertical line.
  void drawFastVLine(int16_t x, int16_t y, uint8_t h, uint8_t color);

  /// Draws a horizontal line.
  void drawFastHLine(int16_t x, int16_t y, uint8_t w, uint8_t color);

  /// Draws a filled-in rectangle.
  void fillRect(int16_t x, int16_t y, uint8_t w, uint8_t h, uint8_t color);

  /// Fills the screen buffer with white or black.
  void fillScreen(uint8_t color);

  /// Draws a rectangle with rounded edges.
  void drawRoundRect(int16_t x, int16_t y, uint8_t w, uint8_t h, uint8_t r, uint8_t color);

  /// Draws a filled-in rectangle with rounded edges.
  void fillRoundRect(int16_t x, int16_t y, uint8_t w, uint8_t h, uint8_t r, uint8_t color);

   /// Draws the outline of a triangle.
  void drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint8_t color);

  /// Draws a filled-in triangle.
  void fillTriangle (int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint8_t color);

  /// Draws a bitmap from program memory to a specific X/Y
  void drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, uint8_t w, uint8_t h, uint8_t color);

  /// Draws images that are bit-oriented horizontally.
  /**
   * This requires a lot of additional CPU power and will draw images slower
   * than drawBitmap, where the images are stored in a format that
   * allows them to be directly written to the screen. It is
   * recommended you use drawBitmap when possible.
   */
  void drawSlowXYBitmap(int16_t x, int16_t y, const uint8_t *bitmap, uint8_t w, uint8_t h, uint8_t color);

  /// Draws an ASCII character at a point.
  void drawChar(int16_t x, int16_t y, unsigned char c, uint8_t color, uint8_t bg, uint8_t size);

  /// Sets the location of the screen cursor.
  void setCursor(int16_t x, int16_t y);

  /// Set text size
  /**
   * As mentioned in drawChar(), individual ASCII characters are 6x8 pixels
   * (5x7 with spacing on two edges). The size is a pixel multiplier,
   * so a size of 2 means each character will be 12x16, etc.
   */
  void setTextSize(uint8_t s);

  /// Sets whether text will wrap at screen edges.
  void setTextWrap(boolean w);

  unsigned char* getBuffer();

  /// Writes a single ASCII character to the screen.
  virtual size_t write(uint8_t);
  
  /// Seeds the random number generator with entropy from the temperature, voltage reading, and microseconds since boot.
  /**
   * This method is still most effective when called semi-randomly such
   * as after a user hits a button to start a game or other semi-random
   * events
   */
  void initRandomSeed();

  /// Swap the references of two pointers.
  void swap(int16_t& a, int16_t& b);

  ArduboyTunes tunes;
  ArduboyAudio audio;

  void setFrameRate(uint8_t rate);
  bool nextFrame();
  bool everyXFrames(uint8_t frames);
  
  /// Returns the load on the CPU as a percentage.
  /**
   * This is based on how much of the time your app is spends rendering
   * frames.  This number can be higher than 100 if your app is rendering
   * really slowly.
   */
  int cpuLoad();
  
  uint8_t frameRate;
  uint16_t frameCount;
  uint8_t eachFrameMillis;
  long lastFrameStart;
  long nextFrameStart;
  bool post_render;
  uint8_t lastFrameDurationMs;

  /// useful for getting raw approximate voltage values
  uint16_t rawADC(byte adc_bits);

protected:
  unsigned char sBuffer[(HEIGHT*WIDTH)/8];


// Adafruit stuff
protected:
  int16_t cursor_x;
  int16_t cursor_y;
  uint8_t textsize;
  boolean wrap; // If set, 'wrap' text at right edge of display
};

#endif