DE1_SoC.sv

import enemy_def::*;

module DE1_SoC (
	HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, KEY, LEDR, SW,
	CLOCK_50, VGA_R, VGA_G, VGA_B, VGA_BLANK_N, VGA_CLK, VGA_HS, VGA_SYNC_N, VGA_VS,
	PS2_CLK, PS2_DAT,
	CLOCK2_50, FPGA_I2C_SCLK, FPGA_I2C_SDAT, AUD_XCK, AUD_DACLRCK, 
	AUD_ADCLRCK, AUD_BCLK, AUD_ADCDAT, AUD_DACDAT
);
	output logic [6:0] HEX0, HEX1, HEX2, HEX3, HEX4, HEX5;
	output logic [9:0] LEDR;
	input logic [3:0] KEY;
	input logic [9:0] SW;

	input CLOCK_50;
	output [7:0] VGA_R;
	output [7:0] VGA_G;
	output [7:0] VGA_B;
	output VGA_BLANK_N;
	output VGA_CLK;
	output VGA_HS;
	output VGA_SYNC_N;
	output VGA_VS;
	
	inout PS2_CLK;
	inout PS2_DAT;

	input CLOCK2_50;
	output FPGA_I2C_SCLK;
	inout FPGA_I2C_SDAT;
	output AUD_XCK;
	input AUD_DACLRCK, AUD_ADCLRCK, AUD_BCLK;
	input AUD_ADCDAT;
	output AUD_DACDAT;

	logic reset;
	logic start;
	logic render_white;
	logic render_enemy, render_crosshair, render_gameover, render_score;
	logic [9:0] x;
	logic [8:0] y;
	logic [7:0] r, g, b;
	
	video_driver #(.WIDTH(640), .HEIGHT(480))
		v1 (.CLOCK_50, .reset, .x, .y, .r, .g, .b,
			 .VGA_R, .VGA_G, .VGA_B, .VGA_BLANK_N,
			 .VGA_CLK, .VGA_HS, .VGA_SYNC_N, .VGA_VS);

	// enemies
	localparam N_ENEMY = 8;
	logic killed;
	logic [N_ENEMY-1:0] enemy_alive;
	logic [8:0] enemy_y [N_ENEMY-1:0];
	enemies #(.N_ENEMY(N_ENEMY)) nme (
		.clk(CLOCK_50), .reset, .start,
		.x, .y,
		.shoot_x, .shoot_y, .shot,
		.gameover,
		.killed,
		.render(render_enemy),
		.enemy_alive,
		.enemy_y
	);

	// gamestate
	logic gameover;
	gamestate #(.N_ENEMY(N_ENEMY)) gs (
		.clk(CLOCK_50), .reset, .start,
		.x, .y,
		.enemy_alive,
		.enemy_y,
		.gameover,
		.render(render_gameover)
	);

	// score
	// Note: score will reset (but not game) if user
	// presses key in the middle of a game
	score sc (
		.clk(CLOCK_50),
		.reset(reset | start),
		.killed,
		.x, .y,
		.render(render_score)
	);
	
	// mouse and gun
	logic button_left;
	logic [5:0] bin_x, bin_y;
	ps2 #(.WIDTH(64), .HEIGHT(48), .BIN(10), .HYSTERESIS(3)) mouse (
		.start, .reset, .CLOCK_50, .PS2_CLK, .PS2_DAT,
		.button_left, .button_right(), .button_middle(),
		.bin_x, .bin_y
	);
	logic [9:0] shoot_x;
	logic [8:0] shoot_y;
	logic shot, gun_cd;
	logic render_crosshair_always;
	gun #(.BIN_W(6), .BIN_SIZE(10)) gun0 (
		.clk(CLOCK_50), .reset,
		.x, .y,
		.bin_x, .bin_y, .button_left,
		.shoot_x, .shoot_y, .shot,
		.render(render_crosshair_always),
		.cd(gun_cd)
	);
	assign render_crosshair = gameover ? 1'b0 : render_crosshair_always;

	// audio
	clock_generator aud_clock_gen (
		CLOCK2_50,
		reset,
		AUD_XCK
	);

	audio_and_video_config cfg(
		CLOCK_50,
		reset,
		FPGA_I2C_SDAT,
		FPGA_I2C_SCLK
	);

	logic aud_write;
	logic [23:0] aud_write_d;
	logic aud_write_ready;
	audio_codec codec(
		.clk(CLOCK_50),
		.reset,
		.read(1'b0),	
		.write(aud_write),
		.writedata_left(aud_write_d), 
		.writedata_right(aud_write_d),
		.AUD_ADCDAT,
		.AUD_BCLK,
		.AUD_ADCLRCK,
		.AUD_DACLRCK,
		.read_ready(), .write_ready(aud_write_ready),
		.readdata_left(), .readdata_right(),
		.AUD_DACDAT
	);

	gunshot_player gp (.clk(CLOCK_50), .reset, .shot, .aud_write_ready, .aud_write, .aud_write_d);
	
	// final render logic
	assign render_white = render_crosshair | render_gameover | render_score;
	assign r = (render_white | render_enemy) ? 8'd255 : 8'd0;
	assign g = render_white ? 8'd255 : 8'd0;
	assign b = g;
	
	assign HEX0 = '1;
	assign HEX1 = '1;
	assign HEX2 = '1;
	assign HEX3 = '1;
	assign HEX4 = '1;
	assign HEX5 = '1;

	assign reset = SW[9];
	assign start = ~KEY[0];

	assign LEDR[0] = gun_cd;
	assign LEDR[9] = reset;
endmodule