Trung tâm đào tạo thiết kế vi mạch Semicon

Bộ Mã Hóa sử dụng diễn tả IF 

1 //-----------------------------------------------------
2 // Design Name : encoder_using_if
3 // File Name : encoder_using_if.v
4 // Function : Encoder using If

 

5 // Coder : -
6 //-----------------------------------------------------
7 module encoder_using_if(
8 binary_out , // 4 bit binary output
9 encoder_in , // 16-bit input
10 enable // Enable for the encoder
11 ); 
12 //-----------Output Ports---------------
13 output [3:0] binary_out ;
14 //-----------Input Ports---------------
15 input enable ; 
16 input [15:0] encoder_in ; 
17 //------------Internal Variables--------
18 reg [3:0] binary_out ; 
19 //-------------Code Start-----------------
20 always @ (enable or encoder_in)
21 begin 
22 binary_out = 0; 
23 if (enable) begin
24 if (encoder_in == 16'h0002) begin
25 binary_out = 1;
26 end if (encoder_in == 16'h0004) begin 
27 binary_out = 2; 
28 end if (encoder_in == 16'h0008) begin 
29 binary_out = 3; 
30 end if (encoder_in == 16'h0010) begin 
31 binary_out = 4; 
32 end if (encoder_in == 16'h0020) begin 
33 binary_out = 5; 
34 end if (encoder_in == 16'h0040) begin 
35 binary_out = 6; 
36 end if (encoder_in == 16'h0080) begin 
37 binary_out = 7; 
38 end if (encoder_in == 16'h0100) begin 
39 binary_out = 8; 
40 end if (encoder_in == 16'h0200) begin 
41 binary_out = 9; 
42 end if (encoder_in == 16'h0400) begin 
43 binary_out = 10; 
44 end if (encoder_in == 16'h0800) begin 
45 binary_out = 11; 
46 end if (encoder_in == 16'h1000) begin
47 binary_out = 12; 
48 end if (encoder_in == 16'h2000) begin 
49 binary_out = 13;
50 end if (encoder_in == 16'h4000) begin 
51 binary_out = 14; 
52 end if (encoder_in == 16'h8000) begin 
53 binary_out = 15; 
54 end
55 end
56 end
57 
58 endmodule

Bộ Mã Hóa - Sử dụng diễn tả case()

1 //-----------------------------------------------------
2 // Design Name : encoder_using_case
3 // File Name : encoder_using_case.v
4 // Function : Encoder using Case
5 // Coder : -
6 //-----------------------------------------------------
7 module encoder_using_case(
8 binary_out , // 4 bit binary Output
9 encoder_in , // 16-bit Input
10 enable // Enable for the encoder
11 );
12 output [3:0] binary_out ;
13 input enable ; 
14 input [15:0] encoder_in ; 
15 
16 reg [3:0] binary_out ;
17 
18 always @ (enable or encoder_in)
19 begin
20 binary_out = 0;
21 if (enable) begin
22 case (encoder_in) 
23 16'h0002 : binary_out = 1; 
24 16'h0004 : binary_out = 2; 
25 16'h0008 : binary_out = 3; 
26 16'h0010 : binary_out = 4;
27 16'h0020 : binary_out = 5; 
28 16'h0040 : binary_out = 6; 
29 16'h0080 : binary_out = 7; 
30 16'h0100 : binary_out = 8;
31 16'h0200 : binary_out = 9;
32 16'h0400 : binary_out = 10; 
33 16'h0800 : binary_out = 11; 
34 16'h1000 : binary_out = 12; 
35 16'h2000 : binary_out = 13; 
36 16'h4000 : binary_out = 14; 
37 16'h8000 : binary_out = 15; 
38 endcase
39 end
40 end
41 
42 endmodule

 KHÓA HỌC IC DESIGN TẠI SEMICON