/**
*	osu!fpga
*
*	An osu!-like rhythm game on DE2-115
*
*	See README for more information
*
*	Copyright (c) 2017 by Fang Lu and Xutao J. Jiang. See LICENSE file
*
*/

`include "gl/gl_def_cmd.sv"

module osu_fpga_toplevel (
	// Clock
	input logic CLOCK_50,

	// Buttons & LEDs
	input logic [1:0] KEY,
	input logic [17:0] SW,
	output logic [7:0] LEDG,
	output logic [17:0] LEDR,
	output logic [6:0] HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, HEX6, HEX7,

	// DRAM
	output logic [12:0] DRAM_ADDR,
	output logic [1:0] DRAM_BA,
	output logic DRAM_CAS_N, DRAM_CKE, DRAM_CS_N,
	inout wire [31:0] DRAM_DQ,
	output logic [3:0] DRAM_DQM,
	output logic DRAM_RAS_N, DRAM_WE_N, DRAM_CLK,

	// SRAM
	output logic [19:0] SRAM_ADDR,
	inout wire [15:0] SRAM_DQ,
	output logic SRAM_UB_N, SRAM_LB_N, SRAM_CE_N, SRAM_OE_N, SRAM_WE_N,

	// Flash
	output logic [22:0] FL_ADDR,
	inout wire [7:0] FL_DQ,
	output logic FL_CE_N, FL_OE_N, FL_WE_N, FL_RESET_N, FL_WP_N,
	input logic FL_RY,

	// PS/2
	inout wire PS2_KBCLK, PS2_KBDAT,

	// HPI (USB)
	inout wire [15:0] OTG_DATA,
	output logic [1:0] OTG_ADDR,
	output logic OTG_CS_N, OTG_OE_N, OTG_WE_N, OTG_RST_N,
	input logic [1:0] OTG_INT,

	// VGA
	output logic VGA_CLK,
	output logic [7:0] VGA_R, VGA_G, VGA_B,
	output logic VGA_SYNC_N, VGA_BLANK_N, VGA_VS, VGA_HS,

	// Audio
	output logic AUD_XCK, AUD_DACDAT, I2C_SCLK,
	input logic AUD_ADCDAT,
	inout wire AUD_BCLK, AUD_ADCLRCK, AUD_DACLRCK, I2C_SDAT,

	// SDCard
	output logic SD_CLK,
	inout wire [3:0] SD_DAT,
	inout wire SD_CMD
);
	// Synchronizers
	logic Reset_h, Clk;
	always_ff @ (posedge CLOCK_50) begin
		Reset_h <= ~(KEY[0]);        // The push buttons are active low
	end

	// Additional wires
	assign FL_WP_N = 1'b1;

	// HPI wrapper
    logic [1:0] hpi_addr;
    logic [15:0] hpi_data_in, hpi_data_out;
    logic hpi_r, hpi_w, hpi_cs;
	hpi_io_intf hpi_io_inst(
		.Clk(CLOCK_50),
		.Reset(Reset_h),
		// signals connected to NIOS II
		.from_sw_address(hpi_addr),
		.from_sw_data_in(hpi_data_in),
		.from_sw_data_out(hpi_data_out),
		.from_sw_r(hpi_r),
		.from_sw_w(hpi_w),
		.from_sw_cs(hpi_cs),
		// signals connected to EZ-OTG chip
		.OTG_DATA(OTG_DATA),
		.OTG_ADDR(OTG_ADDR),
		.OTG_RD_N(OTG_OE_N),
		.OTG_WR_N(OTG_WE_N),
		.OTG_CS_N(OTG_CS_N),
		.OTG_RST_N(OTG_RST_N)
	);

	// Hex drivers
	logic [31:0] hex_export;
	hexdriver hexdrv7(.In(hex_export[31:28]), .Out(HEX7));
	hexdriver hexdrv6(.In(hex_export[27:24]), .Out(HEX6));
	hexdriver hexdrv5(.In(hex_export[23:20]), .Out(HEX5));
	hexdriver hexdrv4(.In(hex_export[19:16]), .Out(HEX4));
	hexdriver hexdrv3(.In(hex_export[15:12]), .Out(HEX3));
	hexdriver hexdrv2(.In(hex_export[11:8]), .Out(HEX2));
	hexdriver hexdrv1(.In(hex_export[7:4]), .Out(HEX1));
	hexdriver hexdrv0(.In(hex_export[3:0]), .Out(HEX0));

	// Main Program (SoC)
	otogame main_soc (
		// Clock
		.clk_clk               (CLOCK_50),
		.reset_reset_n         (~Reset_h),
		// DRAM
		.sdram_wire_addr       (DRAM_ADDR),
		.sdram_wire_ba         (DRAM_BA),
		.sdram_wire_cas_n      (DRAM_CAS_N),
		.sdram_wire_cke        (DRAM_CKE),
		.sdram_wire_cs_n       (DRAM_CS_N),
		.sdram_wire_dq         (DRAM_DQ),
		.sdram_wire_dqm        (DRAM_DQM),
		.sdram_wire_ras_n      (DRAM_RAS_N),
		.sdram_wire_we_n       (DRAM_WE_N),
		.sdram_clk_clk         (DRAM_CLK),
		// Flash
		.flash_conn_ADDR       (FL_ADDR),
		.flash_conn_DQ         (FL_DQ),
		.flash_conn_CE_N       (FL_CE_N),
		.flash_conn_OE_N       (FL_OE_N),
		.flash_conn_WE_N       (FL_WE_N),
		.flash_conn_RST_N      (FL_RESET_N),
		// PS/2
		.ps2_data_export       (PS2_KBDAT),
		.ps2_clk_export        (PS2_KBCLK),
		// USB
		.otg_hpi_address_export(hpi_addr),
		.otg_hpi_data_in_port  (hpi_data_in),
		.otg_hpi_data_out_port (hpi_data_out),
		.otg_hpi_cs_export     (hpi_cs),
		.otg_hpi_r_export      (hpi_r),
		.otg_hpi_w_export      (hpi_w),
		// LEDs
		.hex_export            (hex_export),
		.ledr_export           (LEDR),
		.ledg_export           (LEDG),
		// SRAM
		.sram_addr             (SRAM_ADDR),
		.sram_data             (SRAM_DQ),
		.sram_ce_n             (SRAM_CE_N),
		.sram_oe_n             (SRAM_OE_N),
		.sram_we_n             (SRAM_WE_N),
		.sram_lb_n             (SRAM_LB_N),
		.sram_ub_n             (SRAM_UB_N),
		// VGA
		.vga_clk               (VGA_CLK),
		.vga_r                 (VGA_R),
		.vga_g                 (VGA_G),
		.vga_b                 (VGA_B),
		.vga_hs                (VGA_HS),
		.vga_vs                (VGA_VS),
		.vga_blank_n           (VGA_BLANK_N),
		.vga_sync_n            (VGA_SYNC_N),
		// SDCard
		.sd_sd_dat             (SD_DAT),
		.sd_sd_cmd             (SD_CMD),
		.sd_sd_clk             (SD_CLK)
	);


endmodule