File content as of revision 0:c78ec5cab98d:

/**
 * LED Matrix library for http://www.seeedstudio.com/depot/ultrathin-16x32-red-led-matrix-panel-p-1582.html
 * The LED Matrix panel has 32x16 pixels. Several panel can be combined together as a large screen.
 * 
 * Coordinate & Connection (mbed -> panel 0 -> panel 1 -> ...)
 *   (0, 0)                                     (0, 0)
 *     +--------+--------+--------+               +--------+--------+
 *     |   5    |    3   |    1   |               |    1   |    0   |
 *     |        |        |        |               |        |        |<----- mbed
 *     +--------+--------+--------+               +--------+--------+
 *     |   4    |    2   |    0   |                              (64, 16)
 *     |        |        |        |<----- mbed
 *     +--------+--------+--------+
 *                             (96, 32)
 *  Copyright (c) 2013 Seeed Technology Inc.
 *  @auther     Yihui Xiong
 *  @date       Nov 7, 2013
 *  @license    Apache
 */


#ifndef __LED_MATRIX_H__
#define __LED_MATRIX_H__

#include "mbed.h"
#include "fonts.h"

class LEDMatrix {
public:
    LEDMatrix(PinName pinA, PinName pinB, PinName pinC, PinName pinD, PinName pinOE,
              PinName pinR1, PinName pinR2, PinName pinB1, PinName pinB2, PinName pinG1, PinName pinG2,
              PinName pinG3,PinName pinR3, PinName pinB3, PinName pinR4, PinName pinG4,PinName pinB4,
               PinName pinSTB, PinName pinCLK);
    
    /**
     * set the display's display buffer and number, the buffer's size must be not less than 512 * number / 8 bytes
     * @param displaybuf    display buffer
     * @param number        panels' number
     */
    void begin(uint8_t *displaybuf, uint16_t width, uint16_t height);

    /**
     * draw a point
     * @param x     x
     * @param y     y
     * @param pixel 0: led off, >0: led on
     */
    void drawPoint(uint16_t x, uint16_t y, uint8_t pixel);

    /**
     * draw a rect
     * @param (x1, y1)   top-left position
     * @param (x2, y2)   bottom-right position, not included in the rect
     * @param pixel      0: rect off, >0: rect on
     */
    void drawRect(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint8_t pixel);

    int drawChar(uint16_t x, uint16_t y, char c, uint8_t pixel, Font *font);
   
    void drawCharString (uint16_t x, uint16_t y, char *c, uint8_t pixel, Font *font);
    
    void drawCharBig(uint16_t x, uint16_t y, char c, uint8_t pixel);

    /**
     * draw a image
     * @param (x1, y1)   top-left position
     * @param (x2, y2)   bottom-right position, not included in the rect
     * @param pixels     contents, 1 bit to 1 led
     */
    void drawImage(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint8_t *image);

    /**
     * Set screen buffer to zero
     */
    void clear();

    /**
     * turn off 1/16 leds and turn on another 1/16 leds
     */
    void scan();

    void reverse();

    uint8_t isReversed();

    void on();

    void off();

    void swap();
    
    int synchro();
    
private:
    DigitalOut a, b, c, d, oe, r1, r2, b1, b2, g1, g2, g3, r3, b3, r4, g4, b4, stb, clk;
    uint8_t *displaybuf, *memoBuf, *drawBuf;
    uint16_t width;
    uint16_t height;
    uint8_t  mask;
    uint8_t  state;
    int bufferIndex;
    volatile int flagSwap;
};

#endif