File content as of revision 3:eaaedd09fa6b:

/**  SO1602A is Organic-LED, and has 16 chars/line and 2 lines.
 * 
 * This librarry supports "printf()" C format.
 * 
 *
 * @code
 * #include "mbed.h"
 * #include "SO1602A.h"
 * I2C i2c(p28, p27);
 * SO1602A oled(i2c);
 * DigitalOut led[]= {LED1, LED2, LED3, LED4};
 * int main()
 * {
 *     oled.init();
 *     int iter= 0;
 *     while(true) {
 *         led[0] = !led[0];
 *         oled.printf("iter: %5.5d.", iter);
 *         wait(1.0f);
 *         if(iter%10 == 0)    // 10s
 *             oled.clear();
 *         iter++;
 *     }
 * }
 * @endcode
 */

#pragma once

#include "mbed.h"

// SA0(Pin4); Low: i2c_addr= 0x78, High: 0x7a;
// DDRAM addr. Line1: 0x00 ~ 0x0f. Line2: 0x20 ~ 0x2f.

class SO1602A : public Stream{
public:
    SO1602A (PinName sda, PinName scl, char address= 0x78);
    SO1602A (I2C &_i2c, char address= 0x78);
    
//  ******************** printf() future of C-language. ***************************

    /** Initialize
     */
    void init();

    /** Clear Display.
     */
    void clear();
    
    /** Set Position of char.
     *  @param col: column, row: rows.
     */
    void locate(int col, int row);
    
    /** Set Contrast.
     *  @param val; 256steps, 0x00 ~ 0xff. Contrast increas as the value.
     */
    void setContrast(char val);
    
    /** Set Display flag.
     * @parm Enable Display, Cursor turned on, Cursor Blink.
     */
    void setDispFlag(bool disp= true, bool cursor= true, bool blink= true);

private:    
    I2C i2c;
    char addr;
    char buf[3];
    int col, row;
    
    bool cmd(char chr);
    
    // virtual func for printf() in Stream-class.
    virtual int _putc(int val);
    virtual int _getc();
    
// Function SET
    void setRE();
    void clearRE();
    void setSD();
    void clearSD();

};

// EOF