/*
 * Display.hpp
 *
 *  Created on: Aug 12, 2023
 *      Author: Carst
 */

#ifndef DISPLAY_HPP_
#define DISPLAY_HPP_

#include <cstdint>

namespace ElektronischeLast
{
  class Display
  {
    public:
      /// \brief User defined character number
      typedef enum
      {
        FirstSign = 0,   //!< First user defined character   (accassible via data 0x0)
        SecondSign = 8,  //!< Second user defined character  (accassible via data 0x1)
        ThirdSign = 16,  //!< Third user defined character   (accassible via data 0x2)
        FourthSign = 24, //!< Fourth user defined character  (accassible via data 0x3)
        FifthSign = 32,  //!< Fifth user defined character   (accassible via data 0x4)
        SixthSign = 40,  //!< Sixth user defined character   (accassible via data 0x5)
        SeventhSign = 48,//!< Seventh user defined character (accassible via data 0x6)
        EithSign = 56    //!< Eith user defined character    (accassible via data 0x7)
      } UserDefinedCharakter_t;

      /// \brief Shift direction
      typedef enum
      {
        ShiftLeft = 0,   //!< Shift text left
        ShiftRight = 2   //!< Shift text right
      } ShiftDirection_t;

      /// \brief Shift mode
      typedef enum
      {
        ShiftOff = 0,    //!< Shift disabled
        ShiftOn = 1      //!< Shift enabled
      } ShiftMode_t;

      /// \brief Display State
      typedef enum
      {
        DisplayOff = 0, //!< Display off
        DispalyOn = 4   //!< Display on
      } Display_t;

      /// \brief Cursor State
      typedef enum
      {
        CursorOff = 0,  //!< Cursor off
        CursorOn = 2    //!< Cursor on
      } Cursor_t;

      /// \brief Cursor blink mode
      typedef enum
      {
        CursorBlinkOff = 0, //!< no Cursor blink
        CursorBlinkOn = 1   //!< Cursor blink
      } CursorBlink_t;

      /// \brief Display line selection
      typedef enum
      {
        Line1 = 0,    //!< Select first display line
        Line2 = 0x40, //!< Select second display line
      } Line_t;

      typedef enum
      {
        StateIdle,
        StateDelay,
        StateWaitWhileBusy,
        StateInit01,
        StateInit02,
        StateInit03,
        StateInit04,
        StateInit05,
        StateInit06,
        StateInit07,
        StateInit08,
        StateInit09,
        StateInit10,

      } State_t;

      void init(void);
      void run(void);
      void set_backlight(bool on);
      void set_cursor(Line_t line, std::uint32_t position);
      void print(const char* const string);
    private:
      State_t current_state;
      State_t next_state;
      bool pin_input;
      std::uint32_t timer;
      bool timer_elapsed(void);
      void start_timer(std::uint32_t timeout);
      void wait_while_busy(void);
      void write_command_8bit_4pin(std::uint32_t data);
      void write_command_4bit(std::uint32_t command);
  };
}

#endif /* DISPLAY_HPP_ */