Diff: TextDisplay.h

Revision:

0:edfb85c53631

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TextDisplay.h	Sat May 22 18:18:19 2010 +0000
@@ -0,0 +1,71 @@
+/* mbed TextDisplay Library Base Class
+ * 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.
+ *
+ * A common base class for driving Text displays, providing useful functionality
+ * that can be shared by all text lcds. To port a new display, derive from this 
+ * class and implement the constructor (setup the display), character (put a 
+ * character at a location), rows and columns (number of rows/cols) functions.
+ * Everything else (locate, printf, putc, cls) will come for free
+ *
+ * The model is the display will wrap at the right and bottom, so you can
+ * keep writing and will always get valid characters. The location is 
+ * maintained internally to the class to make this easier
+ */
+
+#ifndef MBED_TEXTDISPLAY_H
+#define MBED_TEXTDISPLAY_H
+
+#include "mbed.h"
+
+class TextDisplay : public Stream {
+public:
+
+    // functions to be implementated in the derived class
+    TextDisplay();
+    virtual void character(int column, int row, int c) = 0;
+    virtual int rows() = 0;
+    virtual int columns() = 0;
+    
+    // functions that come for free, but can be overwritten
+    virtual void cls();
+    virtual void locate(int column, int row);
+    virtual void foreground(int colour);
+    virtual void background(int colour);
+    
+    // other stdio-type functions
+    // putc() inherited from Stream
+    // printf() is inherited from Stream
+    
+protected:
+
+    virtual int _putc(int value);
+    virtual int _getc();
+
+    // character location
+    short _column;
+    short _row;
+
+    // colours
+    int _foreground;
+    int _background;
+};
+
+#endif