#ifndef ST7789_H
#define ST7789_H

#include <stdint.h>

#include "ost_hal.h"

/* If u need Backlight control, uncomment below */
// #define BLK_PORT
// #define BLK_PIN

/*
 * Comment one to use another.
 * 3 parameters can be choosed
 * 135x240(0.96 inch) & 240x240(1.3inch) & 170x320(1.9inch)
 * X_SHIFT & Y_SHIFT are used to adapt different display's resolution
 */

/* Choose a type you are using */
// #define USING_135X240
//  #define USING_240X240
// #define USING_170X320
#define USING_240X320 1

/* Choose a display rotation you want to use: (0-3) */
// #define ST7789_ROTATION 0
#define ST7789_ROTATION 1
// #define ST7789_ROTATION 2				//  use Normally on 240x240
// #define ST7789_ROTATION 3

#ifdef USING_135X240

#if ST7789_ROTATION == 0
#define ST7789_WIDTH 135
#define ST7789_HEIGHT 240
#define X_SHIFT 53
#define Y_SHIFT 40
#endif

#if ST7789_ROTATION == 1
#define ST7789_WIDTH 240
#define ST7789_HEIGHT 135
#define X_SHIFT 40
#define Y_SHIFT 52
#endif

#if ST7789_ROTATION == 2
#define ST7789_WIDTH 135
#define ST7789_HEIGHT 240
#define X_SHIFT 52
#define Y_SHIFT 40
#endif

#if ST7789_ROTATION == 3
#define ST7789_WIDTH 240
#define ST7789_HEIGHT 135
#define X_SHIFT 40
#define Y_SHIFT 53
#endif

#endif

#ifdef USING_240X320

#define ST7789_WIDTH 320
#define ST7789_HEIGHT 240

#if ST7789_ROTATION == 0
#define X_SHIFT 0
#define Y_SHIFT 0
#elif ST7789_ROTATION == 1
#define X_SHIFT 0
#define Y_SHIFT 0
#elif ST7789_ROTATION == 2
#define X_SHIFT 0
#define Y_SHIFT 0
#elif ST7789_ROTATION == 3
#define X_SHIFT 0
#define Y_SHIFT 0
#endif

#endif

#ifdef USING_240X240

#define ST7789_WIDTH 240
#define ST7789_HEIGHT 240

#if ST7789_ROTATION == 0
#define X_SHIFT 0
#define Y_SHIFT 80
#elif ST7789_ROTATION == 1
#define X_SHIFT 80
#define Y_SHIFT 0
#elif ST7789_ROTATION == 2
#define X_SHIFT 0
#define Y_SHIFT 0
#elif ST7789_ROTATION == 3
#define X_SHIFT 0
#define Y_SHIFT 0
#endif

#endif

#ifdef USING_170X320

#if ST7789_ROTATION == 0
#define ST7789_WIDTH 170
#define ST7789_HEIGHT 320
#define X_SHIFT 35
#define Y_SHIFT 0
#endif

#if ST7789_ROTATION == 1
#define ST7789_WIDTH 320
#define ST7789_HEIGHT 170
#define X_SHIFT 0
#define Y_SHIFT 35
#endif

#if ST7789_ROTATION == 2
#define ST7789_WIDTH 170
#define ST7789_HEIGHT 320
#define X_SHIFT 35
#define Y_SHIFT 0
#endif

#if ST7789_ROTATION == 3
#define ST7789_WIDTH 320
#define ST7789_HEIGHT 170
#define X_SHIFT 0
#define Y_SHIFT 35
#endif

#endif

/**
 *Color of pen
 *If you want to use another color, you can choose one in RGB565 format.
 */

#define WHITE 0xFFFF
#define BLACK 0x0000
#define BLUE 0x001F
#define RED 0xF800
#define MAGENTA 0xF81F
#define GREEN 0x07E0
#define CYAN 0x7FFF
#define YELLOW 0xFFE0
#define GRAY 0X8430
#define BRED 0XF81F
#define GRED 0XFFE0
#define GBLUE 0X07FF
#define BROWN 0XBC40
#define BRRED 0XFC07
#define DARKBLUE 0X01CF
#define LIGHTBLUE 0X7D7C
#define GRAYBLUE 0X5458

#define LIGHTGREEN 0X841F
#define LGRAY 0XC618
#define LGRAYBLUE 0XA651
#define LBBLUE 0X2B12

/* Control Registers and constant codes */
#define ST7789_NOP 0x00
#define ST7789_SWRESET 0x01
#define ST7789_RDDID 0x04
#define ST7789_RDDST 0x09

#define ST7789_SLPIN 0x10
#define ST7789_SLPOUT 0x11
#define ST7789_PTLON 0x12
#define ST7789_NORON 0x13

#define ST7789_INVOFF 0x20
#define ST7789_INVON 0x21
#define ST7789_DISPOFF 0x28
#define ST7789_DISPON 0x29
#define ST7789_CASET 0x2A
#define ST7789_RASET 0x2B
#define ST7789_RAMWR 0x2C
#define ST7789_RAMRD 0x2E

#define ST7789_PTLAR 0x30
#define ST7789_COLMOD 0x3A
#define ST7789_MADCTL 0x36

/**
 * Memory Data Access Control Register (0x36H)
 * MAP:     D7  D6  D5  D4  D3  D2  D1  D0
 * param:   MY  MX  MV  ML  RGB MH  -   -
 *
 */

/* Page Address Order ('0': Top to Bottom, '1': the opposite) */
#define ST7789_MADCTL_MY 0x80
/* Column Address Order ('0': Left to Right, '1': the opposite) */
#define ST7789_MADCTL_MX 0x40
/* Page/Column Order ('0' = Normal Mode, '1' = Reverse Mode) */
#define ST7789_MADCTL_MV 0x20
/* Line Address Order ('0' = LCD Refresh Top to Bottom, '1' = the opposite) */
#define ST7789_MADCTL_ML 0x10
/* RGB/BGR Order ('0' = RGB, '1' = BGR) */
#define ST7789_MADCTL_RGB 0x08

#define ST7789_RDID1 0xDA
#define ST7789_RDID2 0xDB
#define ST7789_RDID3 0xDC
#define ST7789_RDID4 0xDD

/* Advanced options */
#define ST7789_COLOR_MODE_16bit 0x55 //  RGB565 (16bit)
#define ST7789_COLOR_MODE_18bit 0x66 //  RGB666 (18bit)

#define ABS(x) ((x) > 0 ? (x) : -(x))

/* Basic functions. */
void ST7789_Init(void);
void ST7789_SetRotation(uint8_t m);
void ST7789_Fill_Color(uint16_t color);
void ST7789_DrawPixel(uint16_t x, uint16_t y, uint16_t color);
void ST7789_Fill(uint16_t xSta, uint16_t ySta, uint16_t xEnd, uint16_t yEnd, uint16_t color);
void ST7789_DrawPixel_4px(uint16_t x, uint16_t y, uint16_t color);
void ST7789_Fill_Line(uint16_t y, const uint8_t *data, const uint8_t *palette);
void ST7789_Fill_LineRgb888(uint16_t y, const color_t *data);

/* Graphical functions. */
void ST7789_DrawLine(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color);
void ST7789_DrawRectangle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color);
void ST7789_DrawCircle(uint16_t x0, uint16_t y0, uint8_t r, uint16_t color);
void ST7789_DrawImage(uint16_t x, uint16_t y, uint16_t w, uint16_t h, const uint16_t *data);
void ST7789_InvertColors(uint8_t invert);

/* Text functions. */
// void ST7789_WriteChar(uint16_t x, uint16_t y, char ch, FontDef font, uint16_t color, uint16_t bgcolor);
// void ST7789_WriteString(uint16_t x, uint16_t y, const char *str, FontDef font, uint16_t color, uint16_t bgcolor);

/* Extented Graphical functions. */
void ST7789_DrawFilledRectangle(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t color);
void ST7789_DrawTriangle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t x3, uint16_t y3, uint16_t color);
void ST7789_DrawFilledTriangle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t x3, uint16_t y3, uint16_t color);
void ST7789_DrawFilledCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color);

/* Command functions */
void ST7789_TearEffect(uint8_t tear);

/* Simple test function. */
void ST7789_Test(void);

#ifndef ST7789_ROTATION
#error You should at least choose a display rotation!
#endif

#endif
