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/****************************************************************************** 
SFE_MicroOLED.h
Header file for the MicroOLED mbed Library

Jim Lindblom @ SparkFun Electronics
October 26, 2014
https://github.com/sparkfun/Micro_OLED_Breakout/tree/master/Firmware/Arduino/libraries/SFE_MicroOLED

Adapted for mbed by Nenad Milosevic
March, 2015

This file defines the hardware SPI interface for the Micro OLED Breakout.

Development environment specifics:
Various suitable mbed platforms
Micro OLED Breakout v1.0

This code was heavily based around the MicroView library, written by GeekAmmo
(https://github.com/geekammo/MicroView-Arduino-Library), and released under 
the terms of the GNU General Public License as published by the Free Software 
Foundation, either version 3 of the License, or (at your option) any later 
version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/

#ifndef SFE_MICROOLED_H
#define SFE_MICROOLED_H

static inline void swap(uint8_t &a, uint8_t &b)
{
    uint8_t t = a;
    
    a = b;
    b = t;
}
 
#ifndef _BV
#define _BV(bit) (1<<(bit))
#endif

#define BLACK 0
#define WHITE 1

#define LCDWIDTH			64
#define LCDHEIGHT			48
#define LCDCOLUMNOFFSET   32 // Visible start column within SSD1306 controller memory
#define FONTHEADERSIZE    6

#define LCDTOTALWIDTH   128  // Full width of SSD1306 controller memory
#define LCDTOTALHEIGHT   64  // Full height of SSD1306 controller memory

#define NORM				0
#define XOR					1

#define PAGE				0
#define ALL					1

#define SETCONTRAST 		0x81
#define DISPLAYALLONRESUME 	0xA4
#define DISPLAYALLON 		0xA5
#define NORMALDISPLAY 		0xA6
#define INVERTDISPLAY 		0xA7
#define DISPLAYOFF 			0xAE
#define DISPLAYON 			0xAF
#define SETDISPLAYOFFSET 	0xD3
#define SETCOMPINS 			0xDA
#define SETVCOMDESELECT		0xDB
#define SETDISPLAYCLOCKDIV 	0xD5
#define SETPRECHARGE 		0xD9
#define SETMULTIPLEX 		0xA8
#define SETLOWCOLUMN 		0x00
#define SETHIGHCOLUMN 		0x10
#define SETSTARTLINE 		0x40
#define MEMORYMODE 			0x20
#define SETCOLUMNBOUNDS		0x21
#define SETPAGEBOUNDS		0x22
#define COMSCANINC 			0xC0
#define COMSCANDEC 			0xC8
#define SEGREMAP 			0xA0
#define CHARGEPUMP 			0x8D
#define EXTERNALVCC 		0x01
#define SWITCHCAPVCC 		0x02

// Scroll
#define ACTIVATESCROLL 					0x2F
#define DEACTIVATESCROLL 				0x2E
#define SETVERTICALSCROLLAREA 			0xA3
#define RIGHTHORIZONTALSCROLL 			0x26
#define LEFTHORIZONTALSCROLL 			0x27
#define VERTICALRIGHTHORIZONTALSCROLL	0x29
#define VERTICALLEFTHORIZONTALSCROLL	0x2A

typedef bool boolean;

class MicroOLED {
public:
	// Constructor
	MicroOLED(SPI &spi, PinName rst, PinName dc, PinName cs) : miol_spi(spi), rstPin(rst), dcPin(dc), csPin(cs)
	{
		// Set default states for the DigitalOut pins.
		rstPin = 1;
		dcPin = 0;
		csPin = 1;
	};
	
	// Initialize SPI mode and frequency and SSD1306 for particular display
	void init(int spi_mode, int spi_freq);
	
	// Standard text output functions
	void putc(char c);
	void puts(const char *cstring);
	void printf(const char *format, ...);

	// RAW LCD functions
	void command(uint8_t c);
	void command(uint8_t c1, uint8_t c2);
	void command(uint8_t c1, uint8_t c2, uint8_t c3);
	void command(uint8_t c1, uint8_t c2, uint8_t c3, uint8_t c4, uint8_t c5, uint8_t c6, uint8_t c7, uint8_t c8);
	
	// LCD Draw functions
	void clear(uint8_t mode);
	void clear(uint8_t mode, uint8_t c);
	void invert(boolean inv);
	void contrast(uint8_t contrast);
	void display(void);
	void setCursor(uint8_t x, uint8_t y);
	void pixel(uint8_t x, uint8_t y);
	void pixel(uint8_t x, uint8_t y, uint8_t color, uint8_t mode);
	void line(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1);
	void line(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, uint8_t color, uint8_t mode);
	void lineH(uint8_t x, uint8_t y, uint8_t width);
	void lineH(uint8_t x, uint8_t y, uint8_t width, uint8_t color, uint8_t mode);
	void lineV(uint8_t x, uint8_t y, uint8_t height);
	void lineV(uint8_t x, uint8_t y, uint8_t height, uint8_t color, uint8_t mode);
	void rect(uint8_t x, uint8_t y, uint8_t width, uint8_t height);
	void rect(uint8_t x, uint8_t y, uint8_t width, uint8_t height, uint8_t color , uint8_t mode);
	void rectFill(uint8_t x, uint8_t y, uint8_t width, uint8_t height);
	void rectFill(uint8_t x, uint8_t y, uint8_t width, uint8_t height, uint8_t color , uint8_t mode);
	void circle(uint8_t x, uint8_t y, uint8_t radius);
	void circle(uint8_t x, uint8_t y, uint8_t radius, uint8_t color, uint8_t mode);
	void circleFill(uint8_t x0, uint8_t y0, uint8_t radius);
	void circleFill(uint8_t x0, uint8_t y0, uint8_t radius, uint8_t color, uint8_t mode);
	void drawChar(uint8_t x, uint8_t y, uint8_t c);
	void drawChar(uint8_t x, uint8_t y, uint8_t c, uint8_t color, uint8_t mode);
	void drawBitmap(const uint8_t * bitArray);
	uint8_t getLCDWidth(void);
	uint8_t getLCDHeight(void);
	void setColor(uint8_t color);
	void setDrawMode(uint8_t mode);
	uint8_t *getScreenBuffer(void);

	// Font functions
	uint8_t getFontWidth(void);
	uint8_t getFontHeight(void);
	uint8_t getTotalFonts(void);
	uint8_t getFontType(void);
	uint8_t setFontType(uint8_t type);
	uint8_t getFontStartChar(void);
	uint8_t getFontTotalChar(void);

	// LCD Rotate Scroll functions	
	void scrollRight(uint8_t start, uint8_t stop);
	void scrollLeft(uint8_t start, uint8_t stop);
	void scrollStop(void);
	void flipVertical(boolean flip);
	void flipHorizontal(boolean flip);
	
private:
	SPI &miol_spi;
	DigitalOut rstPin, dcPin, csPin;
	uint8_t foreColor, drawMode, fontWidth, fontHeight, fontType, fontStartChar, fontTotalChar, cursorX, cursorY;
	uint16_t fontMapWidth;
	static const unsigned char *fontsPointer[];
};
#endif