Diff: PCF2119.h

Revision:

9:27f430d086f3

Parent:

8:308d188a2d3a

Child:

10:d13717a53fe0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF2119.h	Wed Jul 09 03:54:42 2014 +0000
@@ -0,0 +1,130 @@
+/* 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