-- Interactive Audio Manipulation Processor
--
-- file: video.vhd
-- status: simulated; works in hardware, but sometimes cursor "teleports"
--
-- author: Stephen Tang, modified from code by by reference [7]
--
-- This file contains the top level entity for the video interface. It is
-- modified from the file line.vhd in the example code provided by the
-- application notes from reference [7] (the EE552 Dicerace group), at this URL:
-- http://www.ee.ualberta.ca~elliott/ee552/studentAppnotes/1998_w/dicerace_video_display/

LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.all;
USE IEEE.STD_LOGIC_ARITH.all;
USE IEEE.STD_LOGIC_UNSIGNED.all;

library work;
use work.Constants_Pkg.all;


ENTITY video IS
  PORT(
    clock, reset: in STD_LOGIC;
 
    cursorX: in std_logic_vector(DISPLAY_X-1 downto 0);
    cursorY: in std_logic_vector(DISPLAY_Y-1 downto 0);
      -- current joystick cursor position
    
    vga_red, vga_green, vga_blue: out BOOLEAN;
    vga_h_sync,vga_v_sync : out BOOLEAN
  );
END video;
  
ARCHITECTURE TopLevel of video IS

-------------------------------------------------------------------------------
SIGNAL  HSync, VSync:  BOOLEAN;
SIGNAL  countX, countY:  STD_LOGIC_VECTOR(9 downto 0);
SIGNAL  vclock:  STD_LOGIC;

COMPONENT SYNCGEN 
  PORT(
    Clock: IN std_logic;
    vclock: OUT STD_LOGIC;
    HSync, VSync: OUT BOOLEAN;
    vga_h_sync, vga_v_sync: OUT  BOOLEAN
  );
END COMPONENT;

COMPONENT count_xy 
  PORT(
  clock: in STD_LOGIC;
  countX,countY: out STD_LOGIC_VECTOR(9 downto 0);
  HSync,VSync: in BOOLEAN  
  );
END COMPONENT;

component ColourChooser 
  port(
    clock, reset: in std_logic;
    countX, countY:  std_logic_vector(DISPLAY_X-1 downto 0);
    cursorX: in std_logic_vector(DISPLAY_X-1 downto 0);
    cursorY: in std_logic_vector(DISPLAY_Y-1 downto 0);
    vga_red, vga_green, vga_blue: out boolean
  );
end component;

begin
  
  HappyRainbows: ColourChooser port map(
    clock  => clock,
    reset  => reset,
    countX => countX,
    countY => countY,
    cursorX => cursorX,
    cursorY => cursorY,
    vga_red    => vga_red,
    vga_green  => vga_green,
    vga_blue   => vga_blue
  );

  use_syncgen: SYNCGEN port map(
    Clock  => clock,
    vclock => vclock,
    HSync  => HSync,
    VSync  => VSync,
    vga_h_sync =>  vga_h_sync,
    vga_v_sync =>  vga_v_sync 
  );

  use_counter: count_xy PORT MAP(    
    clock  => clock,
    HSync  => HSync,
    VSync  => VSync,
    countX => countX,
    countY => countY   
  );
        
end TopLevel;