lev.v

在quaters下写的比较数的大小输出

`timescale 1ns/1ns
`define 	DATA_WIDTH 	4  
module lev(level,lev_ena,clk,rst,max_number);
  
  output [`DATA_WIDTH-1:0]  level; 
  reg  [`DATA_WIDTH-1:0] level;
    
 input				lev_ena;
 wire				 lev_ena;  
  
 input 			clk;
 wire			 clk;
  
 input		  rst;
 wire			 rst;  
  
 input     [`DATA_WIDTH-1:0]	max_number;
 wire     [`DATA_WIDTH-1:0]		max_number;
  
 always @(posedge clk or negedge rst)
       if(!rst)
             level <= 'b0;
       else
       if(lev_ena)    
       begin
	        if((max_number & 4'b1000) == 4'b1000)
               level <= 4'b0100;   
    	      else if((max_number & 4'b0100) == 4'b0100)
               level <= 4'b0011;   
    	      else if((max_number & 4'b0010) == 4'b0010)
               level <= 4'b0010;   
          	else if((max_number & 4'b0001) == 4'b0001)
               level <= 4'b0001; 
	         else level <= 4'b0000;
       end
       else level <= level; 
 endmodule