Casil LED Backlit 16x2 LCD Display Module Project

//-------------------------------------------------------------------------------------------
// LCD_ST7032.h - Arduino i2c master library for LCD ST7032
// Olav Kallhovd sept2017
//
// Tested Module    : ERC1602-4, EASTRISING TECHNOLOGY CO,.LTD.
// Drive IC         : ST7032
// INTERFACE        : I2C
// VDD              : 2.7V-5.5V
// Tested with MCU	: Arduino Uno, Attiny85@1mhz(5.0V), Attiny85@8mhz(5.0V) and ESP8266(3.3V)
//-------------------------------------------------------------------------------------------

#ifndef LCD_ST7032_h
#define LCD_ST7032_h

#include <Arduino.h>

#define Write_Address                 0x3E //i2c address
#define CNTRBIT                       0x00 //followed by command bytes
#define CNTRBIT_CO                    0x80 //followed by 1 command byte
#define CNTRBIT_RS                    0x40 //after last control byte, followed by DDRAM data byte(s)
#define CLEAR_DISPLAY                 0x01 //Clear display
#define RETURN_HOME                   0x02 //Cursor home to 00H
#define ENTRY_MODE_SET                0x04 //Sets cursor move direction and specifies display shift.
#define DISPLAY_ON_OFF                0x08 //display on, cursor on, cursor position on
#define FUNCTION_SET                  0x20 //DL: interface data is 8/4 bits, N: number of line is 2/1 DH: double height font, IS: instruction table select
#define SET_DDRAM_ADDRESS             0x80 //Set DDRAM address in address counter
#define CURSOR_OR_DISPLAY_SHIFT       0x10 //Set cursor moving and display shift control bit, and the direction without changing DDRAM data.
#define SET_CGRAM_ADDRESS             0x40 //Set CGRAM address in address counter
#define INTERNAL_OSC_FREQ             0x10 //BS=1:1/4 bias, BS=0:1/5 bias, F2~0: adjust internal OSC frequency for FR frequency.
#define POWER_ICON_BOST_CONTR         0x50 //Ion: ICON display on/off, Bon: set booster circuit on/off, C5,C4: Contrast set
#define FOLLOWER_CONTROL              0x60 //Fon: set follower circuit on/off, Rab2~0: select follower amplified ratio.
#define CONTRAST_SET                  0x70 //C0-C3: Contrast set 
#define LINE_1_ADR                    0x80
#define LINE_2_ADR                    0xC0

// Various flags and masks
#define ENTRY_MODE_SET_S              0x01 //S: Shift of entire display, see data sheet
#define ENTRY_MODE_SET_ID             0x02 //I/D : Increment / decrement of DDRAM address (cursor or blink), see  data sheet
#define DISPLAY_ON_OFF_B              0x01 //cursor position on
#define DISPLAY_ON_OFF_C              0x02 //cursor on
#define DISPLAY_ON_OFF_D              0x04 //display on
#define FUNCTION_SET_IS               0x01 //IS: instruction table select
#define FUNCTION_SET_DH               0x04 //DH: double height font
#define FUNCTION_SET_N                0x08 //N: number of line is 2/1
#define FUNCTION_SET_DL               0x10 //DL: interface data is 8/4 bits
#define CURSOR_OR_DISPLAY_SHIFT_RL    0x04 //
#define CURSOR_OR_DISPLAY_SHIFT_SC    0x08 //
#define INTERNAL_OSC_FREQ_F0          0x01 //F2~0: adjust internal OSC frequency for FR frequency.
#define INTERNAL_OSC_FREQ_F1          0x02 //F2~0: adjust internal OSC frequency for FR frequency.
#define INTERNAL_OSC_FREQ_F2          0x04 //F2~0: adjust internal OSC frequency for FR frequency.
#define INTERNAL_OSC_FREQ_BS          0x08 //BS=1:1/4 bias (BS=0:1/5 bias)
#define POWER_ICON_BOST_CONTR_Bon     0x04 //Ion: ICON display on/off
#define POWER_ICON_BOST_CONTR_Ion     0x08 //Bon: set booster circuit on/off
#define FOLLOWER_CONTROL_Rab0         0x01 //Rab2~0: select follower amplified ratio
#define FOLLOWER_CONTROL_Rab1         0x02 //Rab2~0: select follower amplified ratio
#define FOLLOWER_CONTROL_Rab2         0x04 //Rab2~0: select follower amplified ratio
#define FOLLOWER_CONTROL_Fon          0x08 //Fon: set follower circuit on/off

#define CONTRAST_MAX                  0x3F //limit range max value (0x00 - 0x3F)
#define CONTRAST_MIN                  0x10 //limit range min value (0x00 - 0x3F)
#define WRITE_DELAY_MS                  30 //see data sheet
#define HOME_CLEAR_DELAY_MS			  1200 //see data sheet

class LCD_ST7032: public Print 
{
	public:
		LCD_ST7032(); 
		void begin();
		void clear();
		void home();
		void display();
		void noDisplay();
		void setCursor(uint8_t line, uint8_t pos);
		void cursor();
		void noCursor();
		void blink();
		void noBlink();
		void setcontrast(int val);
		void adjcontrast(int val);
		uint8_t getcontrast();
		virtual size_t write(uint8_t chr);
	
	protected:
		void Write_Instruction(uint8_t cmd);
		void Write_Data(uint8_t data);
		uint8_t displayOnOffSetting = (DISPLAY_ON_OFF | DISPLAY_ON_OFF_D);
		uint8_t contrast = 0x18;
};	

#endif