数字电路个人实验二

Posted 2023-02-14 小禹儿

 

代码

module p2s (data_in,clock,reset,load,data_out,done) ;
input [3:0] data_in;
input clock, reset, load;
output data_out;
output done;
reg done;
reg [3:0] temp;
reg [3:0] cnt;
always@ (posedge clock or posedge reset )begin
if (reset)
begin
temp<=0;
cnt<=0;
done<=1;
end
else if(load)
begin
temp<=data_in;
cnt<=0;
done<=0;
end
else if (cnt==3)
begin
temp <=temp[2:0],1'b0;
cnt<=0;
done<=1;
end
else
begin
temp <=temp[2:0],1'b0;
cnt<=cnt+1;
done<=0;
end
end 
assign data_out=(done==1)?1 'bz:temp[3];
endmodule

测试文件

module p2s(data_in,clock,reset,load,data_out,done);
input [3:0]  data_in;
input clock,reset,load;
output  data_out;
output done;
reg done;
  
reg [3:0] temp;
reg [3:0] cnt;

always@(posedge clock or posedge reset ) 
begin
  if(reset)
  begin  
    temp<=0;
    cnt<=0;
    done<=1;
  end
  else if(load)
  begin
    temp<=data_in;             
    cnt<=0;
    done<=0;
  end
  else if(cnt==3)
  begin
    temp <= temp[2:0],1'b0;
    cnt<=0;
    done<=1;
  end
  else
  begin 
    temp <= temp[2:0],1'b0;    
    cnt<=cnt+1;
    done<=0;
  end
end

assign data_out=(done==1)?1'bz:temp[3];   
  
endmodule

module tbp2s;
reg [3:0]  data_in;
reg clock,reset,load;
wire  data_out;
wire  done;

initial
begin
  reset=1;
  #15 reset=0;
end

initial clock=1;
always #5 clock=~clock;

always @(done)
begin
  if(done==1)
  begin
    data_in=$random%16;          
    load=1;                     
  end
  else
  begin
    load=0;
  end
end

always @(posedge clock)
if(load==1)                  
  begin:dis
    integer i;
    i=3;
    repeat(4)                
    begin
      @(posedge clock)
      if(data_out==data_in[i])          
        $display("Output Right!");
      else                           
        $display("Bed Output!data_out= %b ,but data_in[%d]= %b",data_out,i,data_in[i]);
      i=i-1;
    end
  end

p2s ip2s(data_in,clock,reset,load,data_out,done);

endmodule