16位全加器的testbench代码
时间: 2023-10-23 13:14:40 浏览: 184
以下是一个16位全加器的testbench代码,使用Verilog语言编写:
```
module full_adder_tb;
// Inputs
reg [15:0] a, b, cin;
// Outputs
wire [15:0] sum, cout;
// Instantiate the DUT
full_adder dut (
.a(a),
.b(b),
.cin(cin),
.sum(sum),
.cout(cout)
);
// Define clock period
parameter PERIOD = 10;
// Clock signal
reg clk = 0;
always #PERIOD/2 clk = ~clk;
// Test case 1
initial begin
a = 16'h0000;
b = 16'h0000;
cin = 1;
#PERIOD $display("a = %h, b = %h, cin = %h, sum = %h, cout = %h", a, b, cin, sum, cout);
end
// Test case 2
initial begin
a = 16'hFFFF;
b = 16'hFFFF;
cin = 0;
#PERIOD $display("a = %h, b = %h, cin = %h, sum = %h, cout = %h", a, b, cin, sum, cout);
end
// Test case 3
initial begin
a = 16'hF0F0;
b = 16'h0F0F;
cin = 0;
#PERIOD $display("a = %h, b = %h, cin = %h, sum = %h, cout = %h", a, b, cin, sum, cout);
end
// Test case 4
initial begin
a = 16'h1234;
b = 16'h5678;
cin = 1;
#PERIOD $display("a = %h, b = %h, cin = %h, sum = %h, cout = %h", a, b, cin, sum, cout);
end
endmodule
```
在上面的代码中,我们首先定义了输入信号a、b和cin,以及输出信号sum和cout。然后我们实例化了我们要测试的模块full_adder,并将输入信号和输出信号连接到该模块中。接下来,我们定义了时钟信号clk,并使用always块来生成一个周期为PERIOD的时钟信号。最后,我们定义了四个测试用例,每个测试用例对应于一组不同的输入信号,并在每个测试用例中显示输入和输出信号的值。当我们运行这个testbench时,它将自动运行这四个测试用例,并在仿真窗口中显示每个测试用例的结果。
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