File content as of revision 3:bb6fba3e84ff:

/*
* ssd1306.h
*
*  Created on: 20 oct. 2017
*  Author: Miguel Angel Rodriguez Jodar
*
* Based upon Adafruit library.
* GPL licensed.
* 
*/

#ifndef MBED_SSD1306_LIBRARY
#define MBED_SSD1306_LIBRARY

#include "mbed.h"

#define IS_COMMAND         0x00
#define IS_DATA            0x40
#define IS_NOT_LAST        0x80
#define IS_LAST            0x00

#define SSD1306_SETCONTRAST 0x81
#define SSD1306_DISPLAYALLON_RESUME 0xA4
#define SSD1306_DISPLAYALLON 0xA5
#define SSD1306_NORMALDISPLAY 0xA6
#define SSD1306_INVERTDISPLAY 0xA7
#define SSD1306_DISPLAYOFF 0xAE
#define SSD1306_DISPLAYON 0xAF

#define SSD1306_SETDISPLAYOFFSET 0xD3
#define SSD1306_SETCOMPINS 0xDA

#define SSD1306_SETVCOMDETECT 0xDB

#define SSD1306_SETDISPLAYCLOCKDIV 0xD5
#define SSD1306_SETPRECHARGE 0xD9

#define SSD1306_SETMULTIPLEX 0xA8

#define SSD1306_SETLOWCOLUMN 0x00
#define SSD1306_SETHIGHCOLUMN 0x10

#define SSD1306_SETSTARTLINE 0x40

#define SSD1306_MEMORYMODE 0x20

#define SSD1306_COMSCANINC 0xC0
#define SSD1306_COMSCANDEC 0xC8

#define SSD1306_SEGREMAP 0xA0

#define SSD1306_CHARGEPUMP 0x8D

#define SSD1306_EXTERNALVCC 0x1
#define SSD1306_SWITCHCAPVCC 0x2

// Scrolling #defines
#define SSD1306_ACTIVATE_SCROLL 0x2F
#define SSD1306_DEACTIVATE_SCROLL 0x2E
#define SSD1306_SET_VERTICAL_SCROLL_AREA 0xA3
#define SSD1306_RIGHT_HORIZONTAL_SCROLL 0x26
#define SSD1306_LEFT_HORIZONTAL_SCROLL 0x27
#define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL 0x29
#define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL 0x2A

class SSD1306 : private NonCopyable<SSD1306> {
    
public:
    enum PlotStyle
    {
        Normal,
        Inverse,
        Xor
    };
    
    enum I2CSpeed
    {
        Low,
        Medium,
        Fast
    };
    
    /** Creates an instance of a SSD1306 driver, specifying I2C pins to use
    *
    *  @param sda I2C data line pin
    *  @param scl I2C clock line pin
    */
    SSD1306 (PinName sda, PinName scl, char ssd1306_addr = 0x78);
    
    /** Creates an instance of a SSD1306 driver using an existing I2C object
    *
    *  @param busi2c I2C object
    *  @param ssd1306_addr I2C addr of SSD1306 controller
    */
    SSD1306 (I2C &busi2c, char ssd1306_addr = 0x78);
    
    /** Set the frequency of the I2C interface
    *
    *  @param hz The bus frequency in hertz
    */
    void speed (I2CSpeed spd);
    
    int init (void);
    
    void scroll (bool refresh=false);
    
    void putchar (char c, bool refresh=false);
    
    void puts (char *s, bool refresh=false);
        
    void printf (char *fmt,...);
    
    void locate (char row, char column);
    
    void display (void);
    
    void set_contrast (char v);
    
    void cls (char *bkground=NULL, bool refresh=false);
    
    void plot (char x, char y, PlotStyle modo, bool refresh=false);
    
    bool point (char x, char y);
    
    void line (char x0, char y0, char x1, char y1, PlotStyle modo, bool refresh=false);
    
    void circle (char x0, char y0, char r, PlotStyle modo, bool refresh=false);
    
    virtual ~SSD1306 () {
        if (!do_not_delete_bus)
            delete bus;
        delete fb;
    }
    
protected:
    I2C *bus;
    char ssd1306_i2c_addr;
    char *fb;
    char do_not_delete_bus;
    int idxfb;
    int command (char c);
    int data (char d);
    int command_data (char c, char c_or_d, char lastitem);
    char scan ();
    
};

#endif