I2C液晶モジュール

File content as of revision 9:27f430d086f3:

/* PCF2119x based I2C LCD Library
 * Copyright (c) 2014, Hiroshi Suga
 */
/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
 * Copyright (c) 2007-2010, sford, http://mbed.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef __PCF2119_H__
#define __PCF2119_H__

#include "mbed.h"

/**  A PCF2119 interface for driving I2C PCF2119x-based LCDs
 *
 * Currently supports 16x2, 20x2 and 20x4 panels
 *
 * @code
 * #include "mbed.h"
 * #include "PCF2119.h"
 * 
 * TextLCD lcd(p10, p12, p15, p30); // sda, sck, reset
 * 
 * int main() {
 *     lcd.printf("Hello World!\n");
 * }
 * @endcode
 */
class PCF2119 : public Stream {
public:

    /** LCD panel format */
    enum LCDType {
        LCD16x2     /**< 16x2 LCD panel (default) */
        , LCD16x2B  /**< 16x2 LCD panel alternate addressing */
        , LCD20x2   /**< 20x2 LCD panel */
        , LCD20x4   /**< 20x4 LCD panel */
    };

    /** Create a TextLCD interface
     *
     * @param sda   I2C data line pin
     * @param sck   I2C clock line pin
     * @param reset Reset pin
     * @param type  Sets the panel size/addressing mode (default = LCD16x2)
     * @param addr  I2C address (default = 0x74)
     */
    PCF2119(PinName sda, PinName sck, PinName reset, LCDType type = LCD16x2, char addr = 0x74);

    /** Create a TextLCD interface
     *
     * @param i2c   I2C class
     * @param reset Reset pin
     * @param type  Sets the panel size/addressing mode (default = LCD16x2)
     * @param addr  I2C address (default = 0x74)
     */
    PCF2119(I2C &i2c, PinName reset, LCDType type = LCD16x2, char addr = 0x74);

#if DOXYGEN_ONLY
    /** Write a character to the LCD
     *
     * @param c The character to write to the display
     */
    int putc(int c);

    /** Write a formated string to the LCD
     *
     * @param format A printf-style format string, followed by the
     *               variables to use in formating the string.
     */
    int printf(const char* format, ...);
#endif

    /** Locate to a screen column and row
     *
     * @param column  The horizontal position from the left, indexed from 0
     * @param row     The vertical position from the top, indexed from 0
     */
    void locate(int column, int row);

    /** Clear the screen and locate to 0,0 */
    void cls();

    int rows();
    int columns();

    void cgram(int num, const char *data, int len);

    int raw;

protected:

    // Stream implementation functions
    virtual int _putc(int value);
    virtual int _getc();

    void init ();
    int address(int column, int row);
    void character(int column, int row, int c);
    void writeCommand(int command);
    void writeData(int data);
    int ascii2lcd (int c);

    I2C _i2c;
    DigitalOut _reset;
    LCDType _type;

    int _column;
    int _row;
    int _addr;
};

#endif