Diff: TextLCD.h

Revision:

1:ac48b187213c

Parent:

0:edfb85c53631

Child:

2:227356c7d12c

--- a/TextLCD.h	Sat May 22 18:18:19 2010 +0000
+++ b/TextLCD.h	Thu May 27 13:44:15 2010 +0000
@@ -1,48 +1,71 @@
-/* mbed TextLCD Library, for a 4-bit 2x16 LCD
- * Copyright (c) 2007-2010, sford
- *
- * 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.
- */
- 
-#include "TextDisplay.h"
-
-#ifndef MBED_TEXTLCD_H
-#define MBED_TEXTLCD_H
-
-class TextLCD : public TextDisplay {
-public:
-
-    TextLCD(PinName rs, PinName rw, PinName e, PinName d0, PinName d1, PinName d2, PinName d3);
-    virtual void character(int column, int row, int c);
-    virtual int rows(); 
-    virtual int columns();  
-
-    // locate, cls, putc, printf come from derived classes
-    
-protected:
-
-    void writeByte(int value);
-    void writeCommand(int command);
-    void writeData(int data);
-
-    DigitalOut _rw, _rs, _e;
-    BusOut _d;
-};
-
-#endif
+/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
+ * Copyright (c) 2007-2010, sford
+ *
+ * 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 MBED_TEXTLCD_H
+#define MBED_TEXTLCD_H
+
+#include "mbed.h"
+class TextLCD : public Stream {
+public:
+
+    // the different LCDs and addressing modes
+    /** Select the type of LCD */
+    enum LCDType {
+        LCD16x2
+        , LCD16x2B
+        , LCD20x2
+        , LCD20x4
+    };
+
+    TextLCD(PinName rs, PinName e, PinName d0, PinName d1, PinName d2, PinName d3, LCDType type = LCD16x2);
+    // int putc(int c) inherited from Stream
+    // int printf(...) inherited from Stream
+    void character(int column, int row, int c);
+    void locate(int column, int row);
+    void cls();
+    
+    int rows();
+    int columns();  
+    
+    
+protected:
+
+    // Stream implementation functions
+    virtual int _putc(int value);
+    virtual int _getc();
+
+    // internal tx functions
+    void writeByte(int value);
+    void writeCommand(int command);
+    void writeData(int data);
+    int address(int column, int row);
+
+    DigitalOut _rs, _e;
+    BusOut _d;
+    LCDType _type;
+
+    // current row/column
+    int _column;
+    int _row;
+};
+
+#endif