#include <stdlib.h>
#include "stm32f4xx_hal.h"
#include "fonts.h"

#ifndef ssd1306
#define ssd1306

// i2c port naam in main programma gegenereerd door cube
#define SSD1306_I2C_PORT        hi2c1
// I2C address 
#define SSD1306_I2C_ADDR        0x78
// SSD1306 width in pixels
#define SSD1306_WIDTH           128
// SSD1306 LCD height in pixels
#define SSD1306_HEIGHT          64

#define SSD1306_EXTERNALVCC 0x1
#define SSD1306_SWITCHCAPVCC 0x2
#define SSD1306_SETCONTRAST 0x81
#define SSD1306_DISPLAYALLON_RESUME 0xA4
#define SSD1306_DISPLAYALLON 0xA5
#define SSD1306_NORMALDISPLAY 0xA6
#define SSD1306_INVERTDISPLAY 0xA7
#define SSD1306_DISPLAYOFF 0xAE
#define SSD1306_DISPLAYON 0xAF
#define SSD1306_SETDISPLAYOFFSET 0xD3
#define SSD1306_SETCOMPINS 0xDA
#define SSD1306_SETVCOMDETECT 0xDB
#define SSD1306_SETDISPLAYCLOCKDIV 0xD5
#define SSD1306_SETPRECHARGE 0xD9
#define SSD1306_SETMULTIPLEX 0xA8
#define SSD1306_SETLOWCOLUMN 0x00
#define SSD1306_SETHIGHCOLUMN 0x10
#define SSD1306_SETSTARTLINE 0x40
#define SSD1306_MEMORYMODE 0x20
#define SSD1306_COLUMNADDR 0x21
#define SSD1306_PAGEADDR   0x22
#define SSD1306_COMSCANINC 0xC0
#define SSD1306_COMSCANDEC 0xC8
#define SSD1306_SEGREMAP 0xA0
#define SSD1306_CHARGEPUMP 0x8D

// Scrolling #defines
#define SSD1306_ACTIVATE_SCROLL 0x2F
#define SSD1306_DEACTIVATE_SCROLL 0x2E
#define SSD1306_SET_VERTICAL_SCROLL_AREA 0xA3
#define SSD1306_RIGHT_HORIZONTAL_SCROLL 0x26
#define SSD1306_LEFT_HORIZONTAL_SCROLL 0x27
#define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL 0x29
#define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL 0x2A

#ifndef _swap_int16_t
#define _swap_int16_t(a, b) { int16_t t = a; a = b; b = t; }
#endif

//
//  Enum voor de kleuren van het scherm Black en White
//
typedef enum {
    Black = 0x00, /*!< Black color, no pixel */
    White = 0x01  /*!< Pixel is set. Color depends on LCD */
} SSD1306_COLOR;

//
//  Struct om wijzigingen bij te houden
//
typedef struct {
    uint16_t CurrentX;
    uint16_t CurrentY;
    uint8_t Inverted;
    uint8_t Initialized;
} SSD1306_t;

//  De i2c poort staat in de main
extern I2C_HandleTypeDef SSD1306_I2C_PORT;

//
//  De functies definities van de functies die gebruikt kunnen worden
//
uint8_t ssd1306_Init(void);
void ssd1306_Fill(SSD1306_COLOR color);
void ssd1306_UpdateScreen(void);
void ssd1306_DrawPixel(uint8_t x, uint8_t y, SSD1306_COLOR color);
char ssd1306_WriteChar(char ch, FontDef Font, SSD1306_COLOR color);
char ssd1306_WriteString(char* str, FontDef Font, SSD1306_COLOR color);
void ssd1306_SetCursor(uint8_t x, uint8_t y);

void ssd1306_WriteCommand(uint8_t command);
void ssd1306_Scroll(void);
void startscrollright(uint8_t start, uint8_t stop);
void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1);

#endif