MAX72XX.hh

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#ifndef COSA_MAX72XX_HH
#define COSA_MAX72XX_HH

#include "Cosa/LCD.hh"

class MAX72XX : public LCD::Device {
public:
  static const uint8_t WIDTH = 8;
  static const uint8_t HEIGHT = 1;
  static const uint8_t LINES = 1;

  MAX72XX(LCD::IO* io, const uint8_t* font = NULL);

  virtual bool begin();

  virtual bool end();

  virtual void display_contrast(uint8_t level);

  virtual void display_on();

  virtual void display_off();

  virtual void display_clear();

  virtual void set_cursor(uint8_t x, uint8_t y);

  virtual int putchar(char c);

protected:
  enum Register {
    NOP = 0x00,                 
    DIGIT0 = 0x01,              
    DIGIT1 = 0x02,              
    DIGIT2 = 0x03,              
    DIGIT3 = 0x04,              
    DIGIT4 = 0x05,              
    DIGIT5 = 0x06,              
    DIGIT6 = 0x07,              
    DIGIT7 = 0x08,              
    DECODE_MODE = 0x09,         
    INTENSITY = 0x0a,           
    SCAN_LIMIT = 0x0b,          
    DISPLAY_MODE = 0x0c,        
    DISPLAY_TEST = 0x0f         
  } __attribute__((packed));

  enum {
    SHUTDOWN_MODE = 0x00,       
    NORMAL_OPERATION = 0x01     
  } __attribute__((packed));

  enum {
    NO_DECODE = 0x00,           
    ALL_DECODE = 0xff           
  } __attribute__((packed));

  static const uint8_t font[] PROGMEM;

  LCD::IO* m_io;                
  const uint8_t* m_font;        
  char m_latest;                

  void set(Register reg, uint8_t value);
};

#endif