#include<avr/io.h>
#include<util/delay.h>
#include <inttypes.h>
#include <avr/pgmspace.h>
#include "SystemFont5x7.h"


#ifndef	KS0108_H
#define KS0108_H

// Ports
#define lcd_cmd_port		PORTB		// Command Output Register
#define lcd_cmd_ddr			DDRB		// Data Direction Register for Command Port

#define lcd_data_pin		PINA		// Data Input Register
#define lcd_data_port		PORTA		// Data Output Register
#define lcd_data_ddr		DDRA		// Data Direction Register for Data Port

// Command Port Bits
#define D_I					0x00		// D/I Bit Number
#define R_W					0x01		// R/W Bit Number
#define EN					0x02		// EN Bit Number
#define CSEL1				0x03		// CS1 Bit Number
#define CSEL2				0x04		// CS2 Bit Number

// Chips
#define CHIP1				0x00
#define CHIP2				0x01

// Commands
#define LCD_ON				0x3F
#define LCD_OFF				0x3E
#define LCD_SET_ADD			0x40
#define LCD_SET_PAGE		0xB8
#define LCD_DISP_START		0xC0

// colours
#define BLACK				0xFF
#define WHITE				0x00

// Font Indices
#define FONT_LENGTH			0
#define FONT_FIXED_WIDTH	2
#define FONT_HEIGHT			3
#define FONT_FIRST_CHAR		4
#define FONT_CHAR_COUNT		5
#define FONT_WIDTH_TABLE	6

// Uncomment for slow drawing
// #define DEBUG

typedef struct {
	uint8_t x;
	uint8_t y;
	uint8_t page;
} lcdCoord;

typedef uint8_t (*ks0108_fontcallback)(const uint8_t*);

//
// Function Prototypes
//

// Graphic Functions
void ks0108DrawLine(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, uint8_t colour);
void ks0108DrawRect(uint8_t x, uint8_t y, uint8_t width, uint8_t height, uint8_t colour);
void ks0108DrawRoundRect(uint8_t x, uint8_t y, uint8_t width, uint8_t height, uint8_t radius, uint8_t colour);
void ks0108FillRect(uint8_t x, uint8_t y, uint8_t width, uint8_t height, uint8_t colour);
void ks0108InvertRect(uint8_t x, uint8_t y, uint8_t width, uint8_t height);
void ks0108SetInverted(uint8_t invert);
void ks0108SetDot(uint8_t x, uint8_t y, uint8_t colour);

#define ks0108DrawVertLine(x, y, length, colour) {ks0108FillRect(x, y, 0, length, colour);}
#define ks0108DrawHoriLine(x, y, length, colour) {ks0108FillRect(x, y, length, 0, colour);}
#define ks0108DrawCircle(xCenter, yCenter, radius, colour) {ks0108DrawRoundRect(xCenter-radius, yCenter-radius, 2*radius, 2*radius, radius, colour);}
#define ks0108ClearScreen() {ks0108FillRect(0, 0, 127, 63, WHITE);}

// Font Functions
uint8_t ks0108_read_font_data(const uint8_t* ptr);		//Standard Read Callback
void ks0108_select_font(const uint8_t* font, ks0108_fontcallback callback, uint8_t colour);
void ks0108_print_number(uint8_t n);
int ks0108_putchar(char c);
void ks0108_puts(char* str);
void ks0108_puts_p(PGM_P str);
uint8_t ks0108_char_width(char c);
uint16_t ks0108_string_width(char* str);
uint16_t ks0108_string_width_p(PGM_P str);

// Control Functions
void ks0108Enable(void);
void ks0108_cursorto(uint8_t x, uint8_t y);
void ks0108_gotoxy(uint8_t x, uint8_t y);
void ks0108_init(uint8_t invert);
uint8_t ks0108DoReadData(uint8_t first);
uint8_t ks0108_read_data(void);
void ks0108_write_command(uint8_t cmd, uint8_t chip);
void ks0108_write_data(uint8_t data);









#endif