Library and example sketch

1 files changed, 96 insertions, 0 deletions

diff --git a/OLEDFourBit/OLEDFourBit.h b/OLEDFourBit/OLEDFourBit.h
new file mode 100644
index 0000000..a57bfcd
--- /dev/null
+++ b/OLEDFourBit/OLEDFourBit.h
@@ -0,0 +1,96 @@
+#ifndef OLEDFourBit_h
+#define OLEDFourBit_h
+
+#include <inttypes.h>
+#include "Print.h"
+
+// commands
+#define LCD_CLEARDISPLAY 0x01
+#define LCD_RETURNHOME 0x02
+#define LCD_ENTRYMODESET 0x04
+#define LCD_DISPLAYCONTROL 0x08
+#define LCD_CURSORSHIFT 0x10
+#define LCD_FUNCTIONSET 0x28
+#define LCD_SETCGRAMADDR 0x40
+#define LCD_SETDDRAMADDR 0x80
+
+// flags for display entry mode
+#define LCD_ENTRYRIGHT 0x00
+#define LCD_ENTRYLEFT 0x02
+#define LCD_ENTRYSHIFTINCREMENT 0x01
+#define LCD_ENTRYSHIFTDECREMENT 0x00
+
+// flags for display on/off control
+#define LCD_DISPLAYON 0x04
+#define LCD_DISPLAYOFF 0x00
+#define LCD_CURSORON 0x02
+#define LCD_CURSOROFF 0x00
+#define LCD_BLINKON 0x01
+#define LCD_BLINKOFF 0x00
+
+// flags for display/cursor shift
+#define LCD_DISPLAYMOVE 0x08
+#define LCD_CURSORMOVE 0x00
+#define LCD_MOVERIGHT 0x04
+#define LCD_MOVELEFT 0x00
+
+// flags for function set
+#define LCD_8BITMODE 0x10
+#define LCD_4BITMODE 0x00
+#define LCD_ENGLISH_JAPANESE   0x00
+#define LCD_WESTERN_EUROPEAN_1 0x01
+#define LCD_ENGLISH_RUSSIAN    0x02
+#define LCD_WESTERN_EUROPEAN_2 0x03
+
+
+class OLEDFourBit : public Print {
+public:
+  OLEDFourBit(uint8_t rs, uint8_t rw, uint8_t enable, uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
+
+  void init(uint8_t rs, uint8_t rw, uint8_t enable, uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
+
+  void begin(uint8_t cols, uint8_t rows);
+
+  void clear();
+  void home();
+
+  void noDisplay();
+  void display();
+  void noBlink();
+  void blink();
+  void noCursor();
+  void cursor();
+  void scrollDisplayLeft();
+  void scrollDisplayRight();
+  void leftToRight();
+  void rightToLeft();
+  void autoscroll();
+  void noAutoscroll();
+
+  void createChar(uint8_t, uint8_t[]);
+  void setCursor(uint8_t, uint8_t);
+  virtual size_t write(uint8_t);
+  void command(uint8_t);
+  char readChar(void);
+
+private:
+  void send(uint8_t, uint8_t);
+  void write4bits(uint8_t);
+  void pulseEnable();
+  void waitBusy();
+
+  uint8_t _rs_pin; // LOW: command.  HIGH: character.
+  uint8_t _rw_pin; // LOW: write to LCD.  HIGH: read from LCD.
+  uint8_t _enable_pin; // activated by a HIGH pulse.
+  uint8_t _busy_pin;
+  uint8_t _data_pins[4];
+
+  uint8_t _displayfunction;
+  uint8_t _displaycontrol;
+  uint8_t _displaymode;
+  uint8_t _initialized;
+  uint8_t _currline;
+  uint8_t _numlines;
+};
+
+#endif