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/** Digole Serial Display library, I2C
 *
 * @Author: Digole Digital Solutions : www.digole.com ported to mbed by Michael Shimniok www.bot-thoughts.com
 */
#ifndef DigoleSerialDisp_h
#define DigoleSerialDisp_h

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

#define DEC 10
#define HEX 16
#define OCT 8
#define BIN 2

#define delay(x) wait_ms(x)

// Communication set up command
// Text function command
// Graph function command

#define Serial_UART 0;
#define Serial_I2C 1;
#define Serial_SPI 2;
#define _TEXT_ 0
#define _GRAPH_ 1

/** Digole Serial LCD/OLED Library
 *
 * Inherits from the Print class for all the fancy print/println stuff
 *
 * Communication set up command
 *   "SB":Baud (ascII bytes end with 0x00/0x0A/0x0D) -- set UART Baud Rate
 *   "SI2CA":Address(1 byte <127) -- Set I2C address, default address is:0x27
 *   "DC":1/0(1byte) -- set config display on/off, if set to 1, displayer will display current commucation setting when power on
 * Text Function command
 *   "CL": -- Clear screen--OK
 *   "CS":1/0 (1 byte)-- Cursor on/off
 *   "TP":x(1 byte) y(1 byte) -- set text position
 *   "TT":string(bytes) end with 0x00/0x0A/0x0D -- display string under regular mode
 * Graphic function command
 *   "GP":x(1byte) y(1byte) -- set current graphic position
 *   "DM":"C/!/~/&/|/^"(ASCII 1byte) -- set drawing mode--C="Copy",! and ~ = "Not", & = "And", | = "Or", ^ = "Xor"
 *   "SC":1/0 (1byte) -- set draw color--only 1 and 0
 *   "LN":x0(1byte) y0(1byte) x1(1byte) y2(1byte)--draw line from x0,y0 to x1,y1,set new pot to x1,y1
 *   "LT":x(1byte) y(1byte) -- draw line from current pos to x,y
 *   "CC":x(1byte) y(1byte) ratio(byte) -- draw circle at x,y with ratio
 *   "DP":x(1byte) y(1byte) Color(1byte) -- draw a pixel--OK
 *   "DR":x0(1byte) y0(1byte) x1(1byte) y2(1byte)--draw rectangle, top-left:x0,y0; right-bottom:x1,y1
 *   "FR":x0(1byte) y0(1byte) x1(1byte) y2(1byte)--draw filled rectangle, top-left:x0,y0; right-bottom:x1,y1
 */
class DigoleSerialDisp {
public:

    /** Create a new Digole Serial Display interface
     *
     * @param sda - pin for I2C SDA
     * @param scl - pin for I2C SCL
     * @param address - 7-bit address (default is 0x27 for the device)
     */
    DigoleSerialDisp(PinName sda, PinName scl, uint8_t address=0x27);


    /** Carryover from Arduino library, not needed
     */
    void begin(void) { } // nothing to do here


    /** Write out a raw character
     * @param x - character
     * @returns - 1
     */
    size_t write(const char x);


    /** Write out raw data from a buffer
     * @param buffer -- buffer to write
     * @param size -- the number of bytes to write
     * @returns size
     */
    size_t write(const char *buffer, size_t size);


    /** Write out raw string
     * @param str -- string to write
     * @returns number of bytes written
     */
    size_t write(const char *str);
   
   
    /** Prints a char to the display in a single I2C transmission using "TTb\0"
     *
     * @param c - character to print
     * @returns 1
     */
    size_t print(const char c);


    /** Prints a string of data to the display in a single I2C transmission using "TTbbb...\0"
     *
     * @param s -- array of data, null terminated
     * @returns length of s 
     */
    size_t print(const char s[]);


    /** Print out an unsigned char as a number
     * @param u -- integer to print
     * @param base -- base is DEC (default), HEX, BIN
     */
    size_t print(unsigned char u, int base = DEC);


    /** Print out an integer
     * @param i -- integer to print
     * @param base -- base is DEC (default), HEX, BIN
     */
    size_t print(int i, int base = DEC);


    /** Print out an unsigned integer
     * @param u -- integer to print
     * @param base -- base is DEC (default), HEX, BIN
     */
    size_t print(unsigned int u, int base = DEC);
    

    /** Print out a long as a number
     * @param l -- integer to print
     * @param base -- base is DEC (default), HEX, BIN
     */
    size_t print(long l, int base = DEC);
    

    /** Print out an unsigned long
     * @param l -- integer to print
     * @param base -- base is DEC (default), HEX, BIN
     */
    size_t print(unsigned long l, int base = DEC);


    /** Print out a double
     * @param f -- integer to print
     * @param digits -- number of digits after the decimal
     */
    size_t print(double f, int digits = 2);


    /** Prints a string of data to the display in a single I2C transmission using "TTbbb...\0"
     *
     * @param s -- array of data, null terminated
     * @returns length of s 
     */
    size_t println(const char s[]);


    /** Prints a char the display in a single I2C transmission using "TTb\0"
     *
     * @param c -- character to print
     * @returns 1
     */
    size_t println(char c);


    /** Prints an unsigned char as a number
     *
     * @param u -- unsigned char number
     * @returns 1
     */
    size_t println(unsigned char u, int base = DEC);


    /** Print out an integer
     * @param i -- integer to print
     * @param base -- base is DEC (default), HEX, BIN
     */
    size_t println(int i, int base = DEC);


    /** Print out an unsigned char as a number
     * @param u -- integer to print
     * @param base -- base is DEC (default), HEX, BIN
     */
    size_t println(unsigned int u, int base = DEC);


    /** Print out a long as a number
     * @param l -- integer to print
     * @param base -- base is DEC (default), HEX, BIN
     */
    size_t println(long l, int base = DEC);


    /** Print out an unsigned long
     * @param l -- integer to print
     * @param base -- base is DEC (default), HEX, BIN
     */
    size_t println(unsigned long l, int base = DEC);


    /** Print out a double
     * @param f -- integer to print
     * @param digits -- number of digits after the decimal
     */
    size_t println(double f, int digits = 2);


    /** prints -- well, nothing in this case, but let's pretend we printed a \n
     * @returns 1
     */
    size_t println(void);
   

    /*---------functions for Text and Graphic LCD adapters---------*/    

    /** Turns off the cursor */
    void disableCursor(void);
    
    /** Turns on the cursor */
    void enableCursor(void);
    
    /** Displays a string at specified coordinates
     * @param x -- x coordinate to display string
     * @param y -- y coordinate to display string
     * @param s -- string to display
     */
    void drawStr(uint8_t x, uint8_t y, const char *s);
    
    /** Sets the print position for graphics or text
     * @param x -- x coordinate to display string
     * @param y -- y coordinate to display string
     * @param graph -- if _TEXT_ affects subsequent text position, otherwise, affects graphics position
     */
    void setPrintPos(uint8_t x, uint8_t y, uint8_t graph = _TEXT_);
    
    /** Clears the display screen */
    void clearScreen(void);
    
    /** Configure your LCD if other than 1602 and the chip is other than KS0066U/F / HD44780 
     * @param col -- number of columns
     * @param row -- number of rows
     */
    void setLCDColRow(uint8_t col, uint8_t row);
    
    /** Sets a new I2C address for the display (default is 0x27), the adapter will store the new address in memory
     * @param address -- the new address 
     */
    void setI2CAddress(uint8_t add);
    
    /** Display Config on/off, the factory default set is on, 
     * so, when the module is powered up, it will display 
     * current communication mode on LCD, after you 
     * design finished, you can turn it off
     * @param v -- 1 is on, 0 is off
     */
    void displayConfig(uint8_t v);
    
    /** Holdover from Arduino library; not needed */
    void preprint(void);
    
    /*----------Functions for Graphic LCD/OLED adapters only---------*/
    //the functions in this section compatible with u8glib
    void drawBitmap(uint8_t x, uint8_t y, uint8_t w, uint8_t h, const uint8_t *bitmap);
    void setRot90(void);
    void setRot180(void);
    void setRot270(void);
    void undoRotation(void);
    void setRotation(uint8_t);
    void setContrast(uint8_t);
    void drawBox(uint8_t x, uint8_t y, uint8_t w, uint8_t h);
    void drawCircle(uint8_t x, uint8_t y, uint8_t r, uint8_t = 0);
    void drawDisc(uint8_t x, uint8_t y, uint8_t r);
    void drawFrame(uint8_t x, uint8_t y, uint8_t w, uint8_t h);
    void drawPixel(uint8_t x, uint8_t y, uint8_t = 1);
    void drawLine(uint8_t x, uint8_t y, uint8_t x1, uint8_t y1);
    void drawLineTo(uint8_t x, uint8_t y);
    void drawHLine(uint8_t x, uint8_t y, uint8_t w);
    void drawVLine(uint8_t x, uint8_t y, uint8_t h);
    //-------------------------------
    //special functions for our adapters
    
    /** Sets the font
     *
     * @parameter font - available fonts: 6,10,18,51,120,123, user font 200-203
     */
    void setFont(uint8_t font);
    
    /** go to next text line, depending on the font size */
    void nextTextLine(void);
    
    /** set color for graphic function */ 
    void setColor(uint8_t); 
    
    /** Turn on back light */
    void backLightOn(void); 
    
    /** Turn off back light */
    void backLightOff(void); 
    
    /** send command to LCD drectly 
     * @param d - command
     */
    void directCommand(uint8_t d); 
    
    /** send data to LCD drectly
     * @param d -- data
     */
    void directData(uint8_t d); 
    
    /** Move rectangle area on screen to another place
     * @param x0, y1 -- top left of the area to move
     * @param x1, y1 -- bottom right of the area to move
     * @param xoffset, yoffset -- the distance to move
     */
    void moveArea(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, char xoffset, char yoffset);

    /** Display startup screen */
    void displayStartScreen(uint8_t m);
    
    /** Set display mode */
    void setMode(uint8_t m);

    /** set text position back to previous, only one back allowed */
    void setTextPosBack(void);    
    
    void setTextPosOffset(char xoffset, char yoffset);
    void setTextPosAbs(uint8_t x, uint8_t y);
    void setLinePattern(uint8_t pattern);
    /** Only for universal serial adapter */
    void setLCDChip(uint8_t chip);


    /** Set Start Screen, 1st B is the lower byte of data length. 
     * Convert images to C array here: <a href="http://www.digole.com/tools/PicturetoC_Hex_converter.php">http://www.digole.com/tools/PicturetoC_Hex_converter.php</a>
     * @param lon -- length of data
     * @param data -- binary data
     */
    void uploadStartScreen(int lon, const unsigned char *data); //upload start screen
    
    /** Upload a user font
     * @param lon -- length of data
     * @param data -- user font data
     * @param sect -- section of memory you want to upload to
     */
    void uploadUserFont(int lon, const unsigned char *data, uint8_t sect); //upload user font

    /** Send a Byte to output head on board
     * @param x -- byte to output
     */
    void digitalOutput(uint8_t x);

private:
    I2C _device;
    uint8_t _address;
    uint8_t _Comdelay;

    size_t printNumber(unsigned long n, uint8_t base);
    size_t printFloat(double number, uint8_t digits);
};

#endif