Diff: menbed/displays/include/menbedDisplayHD44780.h

Revision:

3:ec80bb6ff5da

Parent:

0:936f1c020120

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/menbed/displays/include/menbedDisplayHD44780.h	Tue Sep 11 10:21:10 2012 +0000
@@ -0,0 +1,79 @@
+/* This code based on 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 _MENBEDDISPLAYHD44780_H_
+#define _MENBEDDISPLAYHD44780_H_
+
+#include "mbed.h"
+#include "menbedDisplay.h"
+
+class MenbedDisplayHD44780 : public MenbedDisplay {
+public:
+
+    /** LCD panel format */
+    enum LCDSize {
+        LCD16x2,   /**< 16x2 LCD panel */
+        LCD16x2B,  /**< 16x2 LCD panel alternate addressing */
+        LCD20x2,   /**< 20x2 LCD panel */
+        LCD20x4,   /**< 20x4 LCD panel (default) */
+    };
+
+    MenbedDisplayHD44780 (PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, LCDSize size = LCD20x4);
+    
+    virtual bool writeLine (const char *line, uint8_t row);
+    virtual void showUpArrow (bool show);
+    virtual void showDownArrow (bool show);
+    virtual uint8_t getLines (void);
+    virtual uint8_t getLineLength (void);
+    
+protected:
+    enum ArrowSelectorChar {
+        CharUP,
+        CharUP_SELECT,
+        CharSELECT,
+        CharDOWN_SELECT,
+        CharDOWN
+    };
+
+    DigitalOut rs, e;
+    BusOut d;
+    LCDSize size;
+    
+    bool upArrowVisible, downArrowVisible;
+    bool topLineSelected, bottomLineSelected;
+    int cursorCol, cursorRow;
+
+    bool gotoPosition(int row, int column);
+    void clear();
+    void cursorOn();
+    void cursorOff();
+
+    int address(int column, int row);
+    void writeByte(int value);
+    void writeCommand(int command);
+    void writeData(int data);
+    void loadCustomChars(void);
+    int rows();
+    int columns();
+};
+
+#endif /* _MENBEDDISPLAYHD44780_H_ */
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