mst_assign.v

链路铜梁调整机制的实现方案

`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company: 
// Engineer: 
// 
// Create Date:    20:14:31 03/10/2008 
// Design Name: 
// Module Name:    MST_assign 
// Project Name: 
// Target Devices: 
// Tool versions: 
// Description: 
//
// Dependencies: 
//
// Revision: 
// Revision 0.01 - File Created
// Additional Comments: 
//
//////////////////////////////////////////////////////////////////////////////////
module MST_assign(clk_125, en, resetn, mfi_2, mst_num);
    input clk_125;
    input en;
    input resetn;
	 input [7:0] mfi_2;
    output [31:0] mst_num;
	 reg [31:0] mst_num;	 
	 wire [7:0] a;
	 
assign a=mfi_2%32;

always @(posedge clk_125 or negedge resetn)
begin:label1
    if(!resetn)    mst_num<=8'b0000_0000;
	 else    if(!en)    mst_num<=mst_num;
	 else    
	     begin
		  case(a)
		  8'b0000_0000:    mst_num<=32'h0000_0001;
		  8'b0000_0001:    mst_num<=32'h0000_0002;
		  8'b0000_0010:    mst_num<=32'h0000_0004;
		  8'b0000_0011:    mst_num<=32'h0000_0008;
		  8'b0000_0100:    mst_num<=32'h0000_0010;
		  8'b0000_0101:    mst_num<=32'h0000_0020;
		  8'b0000_0110:    mst_num<=32'h0000_0040;
		  8'b0000_0111:    mst_num<=32'h0000_0080;
		  8'b0000_1000:    mst_num<=32'h0000_0100;
		  8'b0000_1001:    mst_num<=32'h0000_0200;
		  8'b0000_1010:    mst_num<=32'h0000_0400;
		  8'b0000_1011:    mst_num<=32'h0000_0800;
		  8'b0000_1100:    mst_num<=32'h0000_1000;
		  8'b0000_1101:    mst_num<=32'h0000_2000;
		  8'b0000_1110:    mst_num<=32'h0000_4000;
		  8'b0000_1111:    mst_num<=32'h0000_8000;
		  8'b0001_0000:    mst_num<=32'h0001_0000;
		  8'b0001_0001:    mst_num<=32'h0002_0000;
		  8'b0001_0010:    mst_num<=32'h0004_0000;
		  8'b0001_0011:    mst_num<=32'h0008_0000;
		  8'b0001_0100:    mst_num<=32'h0010_0000;
		  8'b0001_0101:    mst_num<=32'h0020_0000;
		  8'b0001_0110:    mst_num<=32'h0040_0000;
		  8'b0001_0111:    mst_num<=32'h0080_0000;
		  8'b0001_1000:    mst_num<=32'h0100_0000;
		  8'b0001_1001:    mst_num<=32'h0200_0000;
		  8'b0001_1010:    mst_num<=32'h0400_0000;
		  8'b0001_1011:    mst_num<=32'h0800_0000;
		  8'b0001_1100:    mst_num<=32'h1000_0000;
		  8'b0001_1101:    mst_num<=32'h2000_0000;
		  8'b0001_1110:    mst_num<=32'h4000_0000;
		  8'b0001_1111:    mst_num<=32'h8000_0000;
		  default:      mst_num<=32'h0000_0000;
		  endcase
		  end
end	 
endmodule