gx_avalon_isp1362.v

nios ii sopc关于ISP1362和DM9000A的工程

module gx_avalon_isp1362(
    //Avalon Interface
    
    // avalon_slave_0
	clk,
	reset_n,
	chipselect_n, 
	address,
	read_n, 
	write_n, 
	readdata, 
	writedata, 
	irq_n, 
  	
  	// avalon_slave_1 	 
	write_n_avalon_slave_1,
	writedata_avalon_slave_1,
	irq_n_avalon_slave_1,
				
	//Phillips USB controller
	OTG_ADDR, 
	OTG_DATA, 
	OTG_CS_N, 
	OTG_RD_N, 
	OTG_WR_N, 
	OTG_RST_N, 
	OTG_INT0, 
	OTG_INT1, 
	OTG_FSPEED, 
	OTG_LSPEED, 
	OTG_DACK0_N, 
	OTG_DACK1_N
);
	
    //Avalon Interface
	input clk;
	input reset_n;
	input chipselect_n;
	input read_n;
	input write_n;
	input [1:0] address;
	input [15:0] writedata;
	output [15:0] readdata;
	
	input  write_n_avalon_slave_1;
	input  [7:0] writedata_avalon_slave_1;
	output irq_n, irq_n_avalon_slave_1;
	
	//Phillips USB controller
	
	output [1:0] OTG_ADDR;
	inout  [15:0] OTG_DATA;
	output OTG_CS_N; 
	output OTG_RD_N; 
	output OTG_WR_N; 
	output OTG_RST_N;
	input  OTG_INT0; 
	input  OTG_INT1;
	output OTG_FSPEED;
	output OTG_LSPEED;
	output OTG_DACK0_N;
	output OTG_DACK1_N;
	
	//Registers
	reg [15:0] data; 
	reg [15:0] readdata;
	reg irq_n;
	reg irq_n_avalon_slave_1;
	
	reg [1:0]  OTG_ADDR;
	reg OTG_CS_N;
	reg OTG_RD_N;
	reg OTG_WR_N;
	
	
	//Assignments
	assign OTG_RST_N = reset_n;
	assign OTG_DATA = OTG_WR_N ? 16'hZZZZ : data;
	assign OTG_DACK0_N = 1'b1; 
	assign OTG_DACK1_N = 1'b1;
	assign OTG_FSPEED = 0;
	assign OTG_LSPEED = 0;
	
	//Reset condition
	always @ (posedge clk or negedge reset_n)
	begin
		if (reset_n==0)
		begin
			data 		<=  0;
			readdata	<=	0;
			OTG_ADDR	<=	0;
			OTG_CS_N	<=	1;
			OTG_RD_N	<=	1;
			OTG_WR_N	<=	1;
			irq_n					<=	1;
			irq_n_avalon_slave_1	<=	1;
		end
		
		else
		begin
			data		<=	writedata;
			readdata	<=	OTG_DATA;
			OTG_ADDR 	<=	address;
			OTG_CS_N	<=	chipselect_n;
			OTG_RD_N 	<=	read_n;
			OTG_WR_N	<=	write_n;
			irq_n					<=	OTG_INT0;
			irq_n_avalon_slave_1	<=	OTG_INT1;
		end
	end
endmodule