Leigh Brooks / EaEpaper_EM027BS013

Driver to control the EM027BS013 board from Embedded Artists

Dependencies:   EM027BS013

EM027BS013 Simple Driver

This library provides an easy way to write data to the EM027BS013 display, by providing interfaces to common C functions and methods. The library was originally written by Peter Drescher, who created the "EaEpaper" library for the EM027AS012 display (available here, but adapted to use the newer display type and driver (available here), as the existing display is now discontinued.

Big thanks go to the team from Pervasive Displays and Electronic Artists for producing such a nice display, and to Peter for providing the initial interface used in this driver.

TextDisplay.h

Committer:
Leigh_LbR
Date:
2016-05-19
Revision:
1:46dfef41919b
Parent:
0:e36f1973a674

File content as of revision 1:46dfef41919b:

/* mbed TextDisplay Library Base Class
 * Copyright (c) 2007-2009 sford
 * Released under the MIT License: http://mbed.org/license/mit
 *
 * A common base class for Text displays
 * To port a new display, derive from this class and implement
 * the constructor (setup the display), character (put a character
 * at a location), rows and columns (number of rows/cols) functions.
 * Everything else (locate, printf, putc, cls) will come for free
 *
 * The model is the display will wrap at the right and bottom, so you can
 * keep writing and will always get valid characters. The location is 
 * maintained internally to the class to make this easy
 */

#ifndef MBED_TEXTDISPLAY_H
#define MBED_TEXTDISPLAY_H

#include "mbed.h"

class TextDisplay : public Stream {
public:

  // functions needing implementation in derived implementation class
  /** Create a TextDisplay interface
     *
     * @param name The name used in the path to access the strean through the filesystem
     */
    TextDisplay(const char *name = NULL);

    /** output a character at the given position
     *
     * @param column column where charater must be written
     * @param  row where character must be written
     * @param c the character to be written to the TextDisplay
     */
    virtual void character(int column, int row, int c) = 0;

    /** return number if rows on TextDisplay
     * @result number of rows
     */
    virtual int rows() = 0;

    /** return number if columns on TextDisplay
    * @result number of rows
    */
    virtual int columns() = 0;
    
    // functions that come for free, but can be overwritten

    /** redirect output from a stream (stoud, sterr) to  display
    * @param stream stream that shall be redirected to the TextDisplay
    */
    virtual bool claim (FILE *stream);

    /** clear screen
    */
    virtual void cls();
    virtual void locate(int column, int row);
    virtual void foreground(uint16_t colour);
    virtual void background(uint16_t colour);
    // putc (from Stream)
    // printf (from Stream)
    
protected:

    virtual int _putc(int value);
    virtual int _getc();

    // character location
    uint16_t _column;
    uint16_t _row;

    // colours
    uint16_t _foreground;
    uint16_t _background;
    char *_path;
};

#endif