main.h

//header file containing declarations, constants and variables
#ifndef MAIN_HEADER
#define MAIN_HEADER

#define SDRAM_BASE            0xC0000000
#define FPGA_ONCHIP_BASE      0xC8000000
#define FPGA_CHAR_BASE        0xC9000000

/* Cyclone V FPGA devices */
#define LEDR_BASE             0xFF200000
#define HEX3_HEX0_BASE        0xFF200020
#define HEX5_HEX4_BASE        0xFF200030
#define SW_BASE               0xFF200040
#define KEY_BASE              0xFF200050
#define TIMER_BASE            0xFF202000
#define PIXEL_BUF_CTRL_BASE   0xFF203020
#define CHAR_BUF_CTRL_BASE    0xFF203030
#define JTAG_UART_BASE        0xFF201000

/* VGA colors */
#define WHITE 0xFFFF
#define YELLOW 0xFFE0
#define RED 0xF800
#define GREEN 0x07E0
#define BLUE 0x001F
#define CYAN 0x07FF
#define MAGENTA 0xF81F
#define GREY 0xC618
#define PINK 0xFC18
#define ORANGE 0xFC00

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

/* Screen size. */
#define RESOLUTION_X 320
#define RESOLUTION_Y 240

/* Constants for animation */
#define BOX_LEN 2
#define NUM_BOXES 8

#define FALSE 0
#define TRUE 1

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>

void plot_pixel(int x, int y, short int line_color);
void draw_line(int x0, int y0, int x1, int y1, short int line_color);
void clear_screen();
void wait_for_vsync();
void draw_box(int x, int y, short int line_colour);

char get_jtag(volatile int * JTAG_UART_ptr);
void put_jtag(volatile int * JTAG_UART_ptr,char c);

volatile int pixel_buffer_start; // global variable

#endif