gowin-toolchain/RTL/Top.v

module Top (
	clk,
	irst,
	leds,
	txp,
	RGMII_GTXCLK,
	PHY_CLK,
	RGMII_RXCK,
	RGMII_RXD_0,
	RGMII_RXD_1,
	RGMII_RXD_2,
	RGMII_RXD_3,
	RGMII_RXDV,
	RGMII_RST_N,
	RGMII_TXEN
);
	input clk;
	input irst;
	output wire [3:0] leds;
	output wire txp;
	output wire RGMII_GTXCLK;
	output wire PHY_CLK;
	input RGMII_RXCK;
	input RGMII_RXD_0;
	input RGMII_RXD_1;
	input RGMII_RXD_2;
	input RGMII_RXD_3;
	input RGMII_RXDV;
	output wire RGMII_RST_N;
	output wire RGMII_TXEN;
	wire _uart_tx_io_data_ready;
	wire _uart_ce_io_output_ce;
	wire _iddr_dv_io_output_data_0;
	wire [3:0] _iddr_io_output_data_0;
	wire [3:0] _iddr_io_output_data_1;
	wire _byte_queue_read_io_deq_valid;
	wire [7:0] _byte_queue_read_io_deq_bits;
	wire _ethernet_clock_lock;
	wire _rgmii_rxdv_dly2_DO;
	wire _rgmii_rxdv_dly_DO;
	wire _rgmii_rxd_dly2_3_DO;
	wire _rgmii_rxd_dly1_3_DO;
	wire _rgmii_rxd_dly2_2_DO;
	wire _rgmii_rxd_dly1_2_DO;
	wire _rgmii_rxd_dly2_1_DO;
	wire _rgmii_rxd_dly1_1_DO;
	wire _rgmii_rxd_dly2_DO;
	wire _rgmii_rxd_dly1_DO;
	wire [7:0] normal_byte = {_iddr_io_output_data_1, _iddr_io_output_data_0};
	reg [3:0] skewed_byte_REG;
	wire [7:0] skewed_byte = {_iddr_io_output_data_0, skewed_byte_REG};
	reg normal_preamble_seen;
	reg skewed_preamble_seen;
	reg [1:0] ethernet_state;
	wire _GEN = ethernet_state == 2'h0;
	wire [31:0] _GEN_0 = {8'h00, skewed_byte, normal_byte, 8'h00};
	always @(posedge RGMII_RXCK) begin
		skewed_byte_REG <= _iddr_io_output_data_1;
		if (~irst) begin
			normal_preamble_seen <= 1'h0;
			skewed_preamble_seen <= 1'h0;
			ethernet_state <= 2'h0;
		end
		else begin : sv2v_autoblock_1
			reg _GEN_1;
			reg _GEN_2;
			reg _GEN_3;
			_GEN_1 = normal_preamble_seen & (normal_byte == 8'hd5);
			_GEN_2 = _GEN & _iddr_dv_io_output_data_0;
			_GEN_3 = skewed_preamble_seen & (skewed_byte == 8'hd5);
			if (_GEN_2) begin
				normal_preamble_seen <= ~_GEN_1 & ((normal_byte == 8'h55) | normal_preamble_seen);
				skewed_preamble_seen <= ~_GEN_3 & ((skewed_byte == 8'h55) | skewed_preamble_seen);
			end
			if (_iddr_dv_io_output_data_0) begin
				if (_GEN_2) begin
					if (_GEN_3)
						ethernet_state <= 2'h2;
					else if (_GEN_1)
						ethernet_state <= 2'h1;
				end
			end
			else
				ethernet_state <= 2'h0;
		end
	end
	IODELAY #(
		.ADAPT_EN("FALSE"),
		.C_STATIC_DLY(255),
		.DYN_DLY_EN("FALSE")
	) rgmii_rxd_dly1(
		.DI(RGMII_RXD_0),
		.SDTAP(1'h0),
		.DLYSTEP(8'h00),
		.VALUE(1'h0),
		.DO(_rgmii_rxd_dly1_DO),
		.DF()
	);
	IODELAY #(
		.ADAPT_EN("FALSE"),
		.C_STATIC_DLY(52),
		.DYN_DLY_EN("FALSE")
	) rgmii_rxd_dly2(
		.DI(_rgmii_rxd_dly1_DO),
		.SDTAP(1'h0),
		.DLYSTEP(8'h00),
		.VALUE(1'h0),
		.DO(_rgmii_rxd_dly2_DO),
		.DF()
	);
	IODELAY #(
		.ADAPT_EN("FALSE"),
		.C_STATIC_DLY(255),
		.DYN_DLY_EN("FALSE")
	) rgmii_rxd_dly1_1(
		.DI(RGMII_RXD_1),
		.SDTAP(1'h0),
		.DLYSTEP(8'h00),
		.VALUE(1'h0),
		.DO(_rgmii_rxd_dly1_1_DO),
		.DF()
	);
	IODELAY #(
		.ADAPT_EN("FALSE"),
		.C_STATIC_DLY(52),
		.DYN_DLY_EN("FALSE")
	) rgmii_rxd_dly2_1(
		.DI(_rgmii_rxd_dly1_1_DO),
		.SDTAP(1'h0),
		.DLYSTEP(8'h00),
		.VALUE(1'h0),
		.DO(_rgmii_rxd_dly2_1_DO),
		.DF()
	);
	IODELAY #(
		.ADAPT_EN("FALSE"),
		.C_STATIC_DLY(255),
		.DYN_DLY_EN("FALSE")
	) rgmii_rxd_dly1_2(
		.DI(RGMII_RXD_2),
		.SDTAP(1'h0),
		.DLYSTEP(8'h00),
		.VALUE(1'h0),
		.DO(_rgmii_rxd_dly1_2_DO),
		.DF()
	);
	IODELAY #(
		.ADAPT_EN("FALSE"),
		.C_STATIC_DLY(52),
		.DYN_DLY_EN("FALSE")
	) rgmii_rxd_dly2_2(
		.DI(_rgmii_rxd_dly1_2_DO),
		.SDTAP(1'h0),
		.DLYSTEP(8'h00),
		.VALUE(1'h0),
		.DO(_rgmii_rxd_dly2_2_DO),
		.DF()
	);
	IODELAY #(
		.ADAPT_EN("FALSE"),
		.C_STATIC_DLY(255),
		.DYN_DLY_EN("FALSE")
	) rgmii_rxd_dly1_3(
		.DI(RGMII_RXD_3),
		.SDTAP(1'h0),
		.DLYSTEP(8'h00),
		.VALUE(1'h0),
		.DO(_rgmii_rxd_dly1_3_DO),
		.DF()
	);
	IODELAY #(
		.ADAPT_EN("FALSE"),
		.C_STATIC_DLY(52),
		.DYN_DLY_EN("FALSE")
	) rgmii_rxd_dly2_3(
		.DI(_rgmii_rxd_dly1_3_DO),
		.SDTAP(1'h0),
		.DLYSTEP(8'h00),
		.VALUE(1'h0),
		.DO(_rgmii_rxd_dly2_3_DO),
		.DF()
	);
	IODELAY #(
		.ADAPT_EN("FALSE"),
		.C_STATIC_DLY(255),
		.DYN_DLY_EN("FALSE")
	) rgmii_rxdv_dly(
		.DI(RGMII_RXDV),
		.SDTAP(1'h0),
		.DLYSTEP(8'h00),
		.VALUE(1'h0),
		.DO(_rgmii_rxdv_dly_DO),
		.DF()
	);
	IODELAY #(
		.ADAPT_EN("FALSE"),
		.C_STATIC_DLY(200),
		.DYN_DLY_EN("FALSE")
	) rgmii_rxdv_dly2(
		.DI(_rgmii_rxdv_dly_DO),
		.SDTAP(1'h0),
		.DLYSTEP(8'h00),
		.VALUE(1'h0),
		.DO(_rgmii_rxdv_dly2_DO),
		.DF()
	);
	ether_pll ethernet_clock(
		.clkin(clk),
		.init_clk(clk),
		.clkout0(RGMII_GTXCLK),
		.clkout1(PHY_CLK),
		.lock(_ethernet_clock_lock)
	);
	AysncFifo byte_queue(
		.write_io_clk(RGMII_RXCK),
		.write_io_enq_valid(~(~_iddr_dv_io_output_data_0 | _GEN) & ((ethernet_state == 2'h1) | (ethernet_state == 2'h2))),
		.write_io_enq_bits(_GEN_0[ethernet_state * 8+:8]),
		.read_io_clk(clk),
		.read_io_deq_ready(_uart_tx_io_data_ready),
		.read_io_deq_valid(_byte_queue_read_io_deq_valid),
		.read_io_deq_bits(_byte_queue_read_io_deq_bits)
	);
	NIddr iddr(
		.clock(RGMII_RXCK),
		.io_input_data({_rgmii_rxd_dly2_3_DO, _rgmii_rxd_dly2_2_DO, _rgmii_rxd_dly2_1_DO, _rgmii_rxd_dly2_DO}),
		.io_output_data_0(_iddr_io_output_data_0),
		.io_output_data_1(_iddr_io_output_data_1)
	);
	NIddr_1 iddr_dv(
		.clock(RGMII_RXCK),
		.io_input_data(_rgmii_rxdv_dly2_DO),
		.io_output_data_0(_iddr_dv_io_output_data_0)
	);
	RgmiiReset ethernet_reset(
		.clock(clk),
		.reset(~irst),
		.io_ethernet_reset(RGMII_RST_N),
		.io_pll_locked(_ethernet_clock_lock)
	);
	UartClockEnable uart_ce(
		.clock(clk),
		.reset(~irst),
		.io_output_ce(_uart_ce_io_output_ce)
	);
	UartTx uart_tx(
		.clock(clk),
		.reset(~irst),
		.io_data_ready(_uart_tx_io_data_ready),
		.io_data_valid(_byte_queue_read_io_deq_valid),
		.io_data_bits(_byte_queue_read_io_deq_bits),
		.io_signal(txp),
		.io_clock_enable(_uart_ce_io_output_ce)
	);
	assign leds = 4'h0;
	assign RGMII_TXEN = 1'h0;
endmodule