Diff: LCD/LCD.h

Revision:

0:0c4fafa398b4

Child:

2:93f703d2c4d7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD/LCD.h	Wed Sep 26 12:15:00 2012 +0000
@@ -0,0 +1,74 @@
+/* mbed LCD Library, for a 4-bit LCD based on HD44780
+ * Copyright (c) 2007-2010, hb9gaa
+ */
+
+#ifndef __LCD_H
+#define __LCD_H
+
+#include "mbed.h"
+
+class TextLCD : 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 rs    Instruction/data control line
+     * @param e     Enable line (clock)
+     * @param d0-d3 Data lines
+     * @param type  Sets the panel size/addressing mode (default = LCD16x2)
+     */
+    TextLCD(PinName rs, PinName rw, PinName e, PinName d0, PinName d1, PinName d2, PinName d3, LCDType type = LCD16x2);
+
+#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();
+
+protected:
+
+    // Stream implementation functions
+    virtual int _putc(int value);
+    virtual int _getc();
+
+    int address(int column, int row);
+    void character(int column, int row, int c);
+    void writeByte(int value);
+    void writeCommand(int command);
+    void writeData(int data);
+
+    DigitalOut _rs, _rw, _e;
+    BusOut _d;
+    LCDType _type;
+
+    int _column;
+    int _row;
+};
+
+#endif