使用 modelsim 软件设计 4 线-16 线译码器。用 verilog 语言编写模块代码、测试代码,
时间: 2024-03-05 19:51:31 浏览: 28
好的,下面是 Verilog 代码:
```
module decoder_4to16(input [3:0] in, output reg [15:0] out);
always @(*)
begin
case(in)
4'b0000: out = 16'b0000000000000001;
4'b0001: out = 16'b0000000000000010;
4'b0010: out = 16'b0000000000000100;
4'b0011: out = 16'b0000000000001000;
4'b0100: out = 16'b0000000000010000;
4'b0101: out = 16'b0000000000100000;
4'b0110: out = 16'b0000000001000000;
4'b0111: out = 16'b0000000010000000;
4'b1000: out = 16'b0000000100000000;
4'b1001: out = 16'b0000001000000000;
4'b1010: out = 16'b0000010000000000;
4'b1011: out = 16'b0000100000000000;
4'b1100: out = 16'b0001000000000000;
4'b1101: out = 16'b0010000000000000;
4'b1110: out = 16'b0100000000000000;
4'b1111: out = 16'b1000000000000000;
default: out = 16'h0000;
endcase
end
endmodule
```
以上代码实现了一个 4 线-16 线译码器,输入 `in` 是 4 位二进制数,输出 `out` 是 16 位二进制数。根据输入的不同二进制数,输出对应的二进制编码。
以下是测试代码:
```
module decoder_4to16_tb();
reg [3:0] in;
wire [15:0] out;
decoder_4to16 dut(.in(in), .out(out));
initial begin
$monitor("in=%b, out=%b", in, out);
in = 4'b0000;
#10 in = 4'b0001;
#10 in = 4'b0010;
#10 in = 4'b0011;
#10 in = 4'b0100;
#10 in = 4'b0101;
#10 in = 4'b0110;
#10 in = 4'b0111;
#10 in = 4'b1000;
#10 in = 4'b1001;
#10 in = 4'b1010;
#10 in = 4'b1011;
#10 in = 4'b1100;
#10 in = 4'b1101;
#10 in = 4'b1110;
#10 in = 4'b1111;
#10 $finish;
end
endmodule
```
以上测试代码通过模块实例化译码器,并且提供了一个 4 位二进制数的输入信号,每次改变输入信号的值后等待 10 个时间单位,然后打印出输入和输出的值。当输入完所有 16 种可能的二进制数后,终止仿真。
你可以使用 ModelSim 软件来编译和运行以上代码。