Examples of simulation results and I why so much difference, here is the picture and the test code
My simulation waveform
The example simulation waveform
Consult, consult
Test source:
0 ` timescale ns/1 ps
1
2 the module infrared_tb ();
3
Four reg CLK, rst_n;
5 reg key;
6 wire tx;
7 wire [away] show_data;
8
9//because we send only one data in the code, so you can pull the key has been low
10
11 initial begin
12 CLK=1;
13 rst_n=0;
14 key=1;
15
16 # 100.1 rst_n=1;
17
18 # 200 key=0;
19
20 end
21
22 always # 10 CLK=~ CLK;
23
24 infrared dut (
25. The CLK (CLK),
26. The rst_n (rst_n),
27. The key (key),
28. Tx (tx),
29. The rx (rx),
30. Seg1 (seg1),
31. Seg2 (seg2)
32);
33
34 endmodule