manch_en_testbench.txt

1553B曼彻斯特编解码程序,用于总线通信

`timescale 1 ns / 1 ns 

module manch_en_testbench ;

reg [7:0] din ;
reg rst ;
reg clk ;
reg wr ;
wire mdo ;
wire ready ;

manch_en u1(.rst   ( rst  ),
            .clk16x( clk  ),
            .wrn   ( wr   ),
            .din   ( din  ),
            .tbre  ( ready),
            .mdo   ( mdo  )
           ) ;
          
initial begin
rst = 1'b0 ;
clk = 1'b0 ;
din = 8'h0 ;
wr = 1'b0 ;

end

integer me_chann ;

initial begin

me_chann = $fopen("manch_en.rpt");

$fdisplay (me_chann,"\nSimulation of Manchester encoder Start.");

$timeformat(-9,,,5) ;

end

parameter clock_period = 10 ,
          setup_time = clock_period/4 ;
          
always #(clock_period/2) clk = ~clk ;

initial begin
$fmonitor(me_chann,"rst=%b,wr=%b,din=%h,mdo=%b,ready=%b",rst,wr,din,mdo,ready);

#5 rst = 1'b1; 
#15 rst = 1'b0 ;
#(3 * clock_period - setup_time) din = 8'hff ;
#(1 * clock_period) wr = 1'b1 ;
#(1 * clock_period) wr = 1'b0 ;
#(20 * clock_period) din = 8'haa ;
#(1 * clock_period) wr = 1'b1 ;
#(1 * clock_period) wr = 1'b0 ;
#(20 * clock_period) din = 8'h00 ;
#(1 * clock_period) wr = 1'b1 ;
#(1 * clock_period) wr = 1'b0 ;
#(20 * clock_period) din = 8'hf0 ;
#(1 * clock_period) wr = 1'b1 ;
#(1 * clock_period) wr = 1'b0 ;
#(20 * clock_period) din = 8'h0f ;
#(1 * clock_period) wr = 1'b1 ;
#(1 * clock_period) wr = 1'b0 ;
#(100 * clock_period) ;
$fdisplay (me_chann,"\nSimulation of Manchester encoder complete.");
$finish ;
end
endmodule