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commit e1ff579d1a
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+/*****************************************************************************
+
+    source::worx libPiGPio
+    Copyright © 2022 c.holzheuer
+    chris@sourceworx.org
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    Uses:
+
+    pigpiod_if2 by joan2937, pigpio @ abyz.me.uk
+    https://abyz.me.uk/rpi/pigpio
+
+    sigslot  by 2017 Pierre-Antoine Lacaze
+    https://github.com/palacaze/sigslot
+
+***************************************************************************/
+
+
+#ifndef PIGLCD_H
+#define PIGLCD_H
+
+//#include <unistd.h>
+//#include <inttypes.h>
+
+#include <pigi2cnode.h>
+/*
+"""
+  This class provides simple functions to display text on an I2C LCD
+  based on the PCF8574T I2C 8-bit port expander.
+
+  PCF8574T P7   P6   P5   P4   P3   P2   P1   P0
+  HD44780  B7   B6   B5   B4   BL   E    RW   RS
+
+  This code defaults to working with an adapter with the above
+  configuration.
+
+  If yours is different you will have to specify the mapping
+  when you instantiate the LCD.
+  """
+
+  """
+  Commands
+
+  LCD_CLEARDISPLAY = 0x01
+  LCD_RETURNHOME = 0x02
+  LCD_ENTRYMODESET = 0x04
+  LCD_DISPLAYCONTROL = 0x08
+  LCD_CURSORSHIFT = 0x10
+  LCD_FUNCTIONSET = 0x20
+  LCD_SETCGRAMADDR = 0x40
+  LCD_SETDDRAMADDR = 0x80
+
+  Flags for display entry mode
+
+  LCD_ENTRYRIGHT = 0x00
+  LCD_ENTRYLEFT = 0x02
+  LCD_ENTRYSHIFTINCREMENT = 0x01
+  LCD_ENTRYSHIFTDECREMENT = 0x00
+
+  Flags for display on/off control
+
+  LCD_DISPLAYON = 0x04
+  LCD_DISPLAYOFF = 0x00
+  LCD_CURSORON = 0x02
+  LCD_CURSOROFF = 0x00
+  LCD_BLINKON = 0x01
+  LCD_BLINKOFF = 0x00
+
+  Flags for display/cursor shift
+
+  LCD_DISPLAYMOVE = 0x08
+  LCD_CURSORMOVE = 0x00
+  LCD_MOVERIGHT = 0x04
+  LCD_MOVELEFT = 0x00
+
+  Flags for function set
+
+  LCD_8BITMODE = 0x10
+  LCD_4BITMODE = 0x00
+  LCD_2LINE = 0x08
+  LCD_1LINE = 0x00
+  LCD_5x10DOTS = 0x04
+  LCD_5x8DOTS = 0x00
+
+  Flags for backlight control
+
+  LCD_BACKLIGHT = 0x08
+  LCD_NOBACKLIGHT = 0x00
+  """
+*/
+
+
+/**
+ * @brief The pigLCD class für //HD44780
+ * Back-Port von python, siehe: https://abyz.me.uk/rpi/pigpio/code/i2c_lcd_py.zip
+ *
+ */
+
+class pigLCD : public pigI2CNode
+{
+//HD44780
+public:
+
+    pigLCD() = default;
+    pigLCD( i2c_addr_t addr, i2c_bus_t bus = 1 );
+    virtual ~pigLCD();
+
+    void init( i2c_addr_t addr, i2c_bus_t bus=1, int width=16, bool bl=true,
+               uint8_t RS=0, uint8_t RW=1, uint8_t E=2, uint8_t BL=3, uint8_t B4=4 );
+
+    void set_backlight( bool bl );
+    void move_to( int row, int col );
+    void write( const char c );
+    void write( const std::string text );
+    void write( int row, int col, const std::string text );
+
+
+    // inwieweit notwendig?
+   void reset();
+
+protected:
+
+    void put_byte( uint8_t MSb, uint8_t LSb );
+    void put_inst( uint8_t bits );
+    void put_data( uint8_t bits );
+ 
+    uint8_t _LCD_ROW[4] = { 0x80, 0xC0, 0x94, 0xD4 };
+
+    bool _backlight = false;
+    int  _width     = 16;
+
+    //?? Type?
+    uint8_t _RS;
+    uint8_t _E;
+    uint8_t _BL;
+    uint8_t _B4;
+    /*
+    // GPIO chip i2c address
+    uint8_t i2c=0x27;
+    // Control line PINs
+    uint8_t en=2;
+    uint8_t rw=1;
+    uint8_t rs=0;
+
+    // Data line PINs
+    uint8_t d4=4;
+    uint8_t d5=5;
+    uint8_t d6=6;
+    uint8_t d7=7;
+
+    // Backlight PIN
+    uint8_t bl=3;
+
+    // LCD display size (1x16, 2x16, 4x20)
+    uint8_t rows=2;
+    uint8_t cols=16;
+    */
+
+};
+
+#endif // PIGLCD_H