SPI_VFD.h

#ifndef SPI_VFD_h
#define SPI_VFD_h

#include <inttypes.h>
#include "Print.h"

// commands
#define VFD_CLEARDISPLAY 0x01
#define VFD_RETURNHOME 0x02
#define VFD_ENTRYMODESET 0x04
#define VFD_DISPLAYCONTROL 0x08
#define VFD_CURSORSHIFT 0x10
#define VFD_FUNCTIONSET 0x30
#define VFD_SETCGRAMADDR 0x40
#define VFD_SETDDRAMADDR 0x80

// flags for display entry mode
#define VFD_ENTRYRIGHT 0x00
#define VFD_ENTRYLEFT 0x02
#define VFD_ENTRYSHIFTINCREMENT 0x01
#define VFD_ENTRYSHIFTDECREMENT 0x00

// flags for display on/off control
#define VFD_DISPLAYON 0x04
#define VFD_DISPLAYOFF 0x00
#define VFD_CURSORON 0x02
#define VFD_CURSOROFF 0x00
#define VFD_BLINKON 0x01
#define VFD_BLINKOFF 0x00

// flags for display/cursor shift
#define VFD_DISPLAYMOVE 0x08
#define VFD_CURSORMOVE 0x00
#define VFD_MOVERIGHT 0x04
#define VFD_MOVELEFT 0x00

// flags for function set
#define VFD_2LINE 0x08
#define VFD_1LINE 0x00
#define VFD_BRIGHTNESS25 0x03
#define VFD_BRIGHTNESS50 0x02
#define VFD_BRIGHTNESS75 0x01
#define VFD_BRIGHTNESS100 0x00

#define VFD_SPICOMMAND 0xF8
#define VFD_SPIDATAWRITE 0xFA
#define VFD_SPIDATAREAD 0xFE
#define VFD_SPIADDREAD 0xFC

class SPI_VFD : public Print {
public:
    SPI_VFD(uint8_t data, uint8_t clock, uint8_t strobe, uint8_t brightness = VFD_BRIGHTNESS100);
    
    void init(uint8_t data, uint8_t clock, uint8_t strobe, uint8_t brightness);
    void begin(uint8_t cols, uint8_t rows, uint8_t brightness = VFD_BRIGHTNESS100);
    
    void clear();
    void home();
    
    void setBrightness(uint8_t brightness);
    uint8_t getBrightness();
    void noDisplay();
    void display();
    void noBlink();
    void blink();
    void noCursor();
    void cursor();
    void scrollDisplayLeft();
    void scrollDisplayRight();
    void leftToRight();
    void rightToLeft();
    void autoscroll();
    void noAutoscroll();
    
    void createChar(uint8_t, uint8_t[]);
    void setCursor(uint8_t, uint8_t); 
    virtual void write(uint8_t);
    virtual uint8_t read_addr();
	void command(uint8_t);
private:
	inline void send(uint8_t data);
	inline uint8_t recv();
        
	uint8_t _clock, _data, _strobe;  // SPI interface
        
	uint8_t _displayfunction;
	uint8_t _displaycontrol;
	uint8_t _displaymode;
        
	uint8_t _initialized;
        
	uint8_t _numlines, _currline;
};
    
#endif