/*
* 20180128 Initial release version 1.00
* 20180129 Version 1.10
* 20180201 Version 1.20
*/

#ifndef LiquidCrystal_7228_h
#define LiquidCrystal_7228_h

#include <inttypes.h>
#include "Print.h"

// lcd commands
#define LCD_SFF      0x10                             //Set LCD frame rate
#define LCD_SMM      0x18                             //Set LCD multiplex mode
#define LCD_DISP_OFF 0x08                             //Turn display off
#define LCD_DISP_ON  0x09                             //Turn display on
#define LCD_LDPI     0x80                             //Move cursor (load data immediate)
#define LCD_SRM      0x60                             //Set read mode
#define LCD_SWM      0x64                             //Set write mode
#define LCD_SORM     0x68                             //Set data OR mode
#define LCD_SANDM    0x6C                             //Set data AND mode
#define LCD_SCML     0x71                             //Set character left-to-right entry mode
#define LCD_SCMR     0x72                             //Set character right-to-left entry mode
#define LCD_BRESET   0x20                             //Clear a data bit
#define LCD_BSET     0x40                             //Set a data bit
#define LCD_CLCURS   0x7C                             //Clear character cursor
#define LCD_WRCURS   0x7D                             //Set (write) character cursor
#define LCD_STOP     0x01                             //Halt the LCD controller
// There are three modes of display, can write characters, 8 bit bytes, or individual bits
// Writing characters or their cursor inc/dec the internal column counter by 5

#define left         0x00                             //left chip, master chip always 0x00
#define right        0x01                             //right chip, usually 0x01 or 0x11
#define cmd_flag     1                                //writing a command
#define data_flag    0                                //writing data
#define auto_inc     0x00                             //auto increment
#define auto_dec     0x01                             //auto decrement
#define auto_none    0x03                             //don't move data cursor after operation
#define TRUE         1;
#define FALSE        0;
#define pwmRegister  OCR1B                             //the logical pin, can be set to OCR1A or B


class LiquidCrystal_7228 : public Print {
public:
  LiquidCrystal_7228(uint8_t bsy, uint8_t stb, uint8_t cs, uint8_t c_d, uint8_t rst, int  clk,
           uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3);

  void init(uint8_t bsy, uint8_t stb, uint8_t cs, uint8_t c_d, uint8_t rst, int  clk,
           uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3);
    
  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 lineWrap();
  void noLinewrap();
  void dataMode(uint8_t data_mode);
  void noDataMode();

//  void setRowOffsets(int row1, int row2, int row3, int row4);
  void createChar(uint8_t, uint8_t[]);
  void setCursor(uint8_t, uint8_t);
  void dataPlot(uint8_t x, uint8_t y, uint8_t plot_type);
  void barGraph(uint8_t x, uint8_t bank);
  virtual size_t write(uint8_t);
  void command(uint8_t);
  
  using Print::write;
private:
  void setup_nibble(uint8_t value);
  void write_nibble(uint8_t code, uint8_t chip, uint8_t flag);
  void lcd_cmd(uint8_t cmd);
  void lcd_char(char asci);
  void chip_init();
  void fillDisplay(void);
  void scrollBackward(void);
  void scrollForward(void);
  void write_data(uint8_t aByte, uint8_t chip);

  //our character cursor position
  uint8_t col;
  uint8_t row;

  uint8_t num_cols;                        //number of character columns on the display
  uint8_t num_rows;                        //number of character rows (prog only tested with 2 lines)
  uint8_t text_dir;                        //left-to-right or right-to-left entry mode?
  uint8_t autoscroll_on;                   //autoscroll the line as characters entered?
  uint8_t cursor_on;                       //display visible cursor?
  uint8_t wrap_on;                         //wrap lines back to start of line?
  uint8_t data_on;                         //data mode or character mode
  char    buffer[20][2];

  //Arduino pins, allocated at run time
  uint8_t _busy_pin;
  uint8_t _strobe_pin;
  uint8_t _select_pin;
  uint8_t _command_pin;
  uint8_t _reset_pin;
  int     outPin;                          //the clock physical pin
  uint8_t _data_pins[4];

  //settings for pwm clock pin
  long period = 1;                         //the LCD clock period in microseconds (1=1MHz, 2=500MHz)
  int duty = 512;                          //duty as a range from 0 to 1024, 512 is 50% duty cycle
  int prescale[6] = {0, 1, 8, 64, 256, 1024}; //the range of prescale values
};

#endif