模块计数器(输入 CLK、输入复位、输出注册 [3:0] 计数);如果(重置)计数<= 4'B1111,则始终@(posedge clk或posedge重置);否则计数 <= 计数 - 1;endmodule为以上代码编写测试激励
时间: 2024-02-16 11:00:37 浏览: 23
下面是一个可能的测试激励代码,它可以测试模块计数器的正常计数和复位功能:
```
`timescale 1ns / 1ps
module testbench;
// Inputs
reg clk;
reg reset;
// Outputs
wire [3:0] count;
// Instantiate the unit under test (UUT)
module_counter uut (
.clk(clk),
.reset(reset),
.count(count)
);
// Initialize inputs
initial begin
clk = 0;
reset = 1;
#10 reset = 0;
end
// Toggle the clock
always #5 clk = ~clk;
// Test case 1: normal counting
initial begin
$display("Test case 1: normal counting");
#20;
assert(count === 4'b0000) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0001) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0010) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0011) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0100) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0101) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0110) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0111) else $error("Error: count=%d", count);
#10;
assert(count === 4'b1000) else $error("Error: count=%d", count);
#10;
assert(count === 4'b1001) else $error("Error: count=%d", count);
#10;
assert(count === 4'b1010) else $error("Error: count=%d", count);
#10;
assert(count === 4'b1011) else $error("Error: count=%d", count);
#10;
assert(count === 4'b1100) else $error("Error: count=%d", count);
#10;
assert(count === 4'b1101) else $error("Error: count=%d", count);
#10;
assert(count === 4'b1110) else $error("Error: count=%d", count);
#10;
assert(count === 4'b1111) else $error("Error: count=%d", count);
$display("Test case 1 passed successfully!");
end
// Test case 2: reset
initial begin
$display("Test case 2: reset");
#20;
reset = 1;
#10 reset = 0;
#10 reset = 1;
#10 reset = 0;
#10 reset = 1;
#10 reset = 0;
#10;
assert(count === 4'b0000) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0001) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0010) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0011) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0000) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0001) else $error("Error: count=%d", count);
#10;
assert(count === 4'b0000) else $error("Error: count=%d", count);
$display("Test case 2 passed successfully!");
end
// End simulation
initial begin
$display("Simulation complete.");
$finish;
end
endmodule
```
注意,这只是一个示例测试激励代码,你需要根据具体的模块实现进行修改。同时,还需要进行仿真验证,以确保模块实现的正确性。