Diff: lcd.h

Revision:

0:0db835052212

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lcd.h	Fri Nov 08 07:03:35 2013 +0000
@@ -0,0 +1,54 @@
+#ifndef LCD
+#define LCD
+
+#include "mbed.h"
+
+#define klcdWriteMode           0
+#define klcdReadMode            1
+#define klcdInstructionRegister 0
+#define klcdDataRegister        1
+#define klcdEnableHigh          1
+#define klcdEnableLow           0
+
+class lcd : public Stream{
+    public:
+        //uses the four bit interface with a read/write pin in order to read the busy flag
+        lcd(PinName _rs, PinName _rw, PinName _e, PinName _db4, PinName _db5, PinName _db6, PinName _db7);
+        
+        //clear the screen
+        void clear();
+        
+        //move to a location on the screen, the next printf or putc call
+        //  will locate the character at the location
+        void locate(int _row, int _column);
+        
+        //place a character at a location
+        void locateCharacter(int _row, int _column, int _char);
+        
+        //define a character with a 8 element array of 5 bit wide pixel
+        //  definitions, from top to bottom
+        void defineCharacter(int _char, int _charData[8]);
+        
+    protected:
+        void setMode(int _mode);
+        void waitUntilNotBusy();
+        int readByte(int _reg);
+        void writeByte(int _reg, int _byte, bool _wait = true);
+        int readNibble(int _reg);
+        void writeNibble(int _reg, int _nibble);
+        
+        //stream implementation
+        virtual int _putc(int _value);
+        virtual int _getc();
+        
+        BusInOut dataBus;
+        DigitalOut registerSelect;
+        DigitalOut readWrite;
+        DigitalOut enable;
+               
+        int currentMode;
+        int column;
+        int row;
+};
+
+#endif
\ No newline at end of file