Diff: Adafruit_I2C_LCD.h

Revision:

0:4f1c764a42d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Adafruit_I2C_LCD.h	Mon Nov 19 09:44:37 2018 +0000
@@ -0,0 +1,130 @@
+/***************************************************
+  This is a library for the Adafruit RGB 16x2 LCD Shield
+  Pick one up at the Adafruit shop!
+  ---------> http://http://www.adafruit.com/products/714
+
+  The shield uses I2C to communicate, 2 pins are required to
+  interface
+  Adafruit invests time and resources providing this open source code,
+  please support Adafruit and open-source hardware by purchasing
+  products from Adafruit!
+
+  Written by Limor Fried/Ladyada for Adafruit Industries.
+  BSD license, all text above must be included in any redistribution
+ ****************************************************/
+
+#ifndef ADAFRUIT_I2C_LCD_H
+#define ADAFRUIT_I2C_LCD_H
+
+#include "Adafruit_MCP23017.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 0x20
+#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_2LINE 0x08
+#define LCD_1LINE 0x00
+#define LCD_5x10DOTS 0x04
+#define LCD_5x8DOTS 0x00
+
+#define BUTTON_UP 0x08
+#define BUTTON_DOWN 0x04
+#define BUTTON_LEFT 0x10
+#define BUTTON_RIGHT 0x02
+#define BUTTON_SELECT 0x01
+
+#define HIGH true
+#define LOW false
+
+#include "mbed.h"
+
+class Adafruit_I2C_LCD
+{
+public:
+    Adafruit_I2C_LCD(I2C *master, uint8_t cols, uint8_t lines, uint8_t dotsize = LCD_5x8DOTS);
+    ~Adafruit_I2C_LCD();
+
+    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();
+
+    // only if using backpack
+    void setBacklight(uint8_t status);
+
+    void createChar(uint8_t, uint8_t[]);
+    void setCursor(uint8_t, uint8_t);
+    void write(uint8_t);
+    void print(char *, size_t);
+    void command(uint8_t);
+    uint8_t readButtons();
+
+private:
+	void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS);
+	
+    void send(uint8_t, uint8_t);
+    void write4bits(uint8_t);
+    void write8bits(uint8_t);
+    void pulseEnable();
+    void _digitalWrite(uint8_t, uint8_t);
+    void _pinMode(uint8_t, uint8_t);
+
+    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 _data_pins[8];
+    uint8_t _button_pins[5];
+    uint8_t _displayfunction;
+    uint8_t _displaycontrol;
+    uint8_t _displaymode;
+
+    uint8_t _initialized;
+
+    uint8_t _numlines,_currline;
+
+    uint8_t _i2cAddr;
+    Adafruit_MCP23017 *_i2c;
+};
+
+#endif
+