对该设计写一个测试激励
时间: 2024-03-06 11:47:08 浏览: 20
以下是一个基于Verilog语言实现的以太网CRC32校验电路的测试激励代码,该测试激励代码包括了对输入信号的设置和对输出结果的验证。
```verilog
module crc32_tb;
reg clk;
reg [7:0] rxd;
reg sop, eop, rxdvld;
wire [31:0] crc32;
crc32 dut (
.clk(clk),
.rxd(rxd),
.sop(sop),
.eop(eop),
.rxdvld(rxdvld),
.crc32(crc32)
);
initial begin
clk = 1'b0;
forever #3 clk = ~clk;
end
initial begin
// 输入一帧数据
rxd <= 8'h55;
sop = 1'b1;
eop = 1'b0;
rxdvld = 1'b1;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'h55;
#156 rxd <= 8'hd5;
#156 rxd <= 8'h3c;
#156 rxd <= 8'hfd;
#156 rxd <= 8'hcc;
#156 rxd <= 8'hfc;
#156 rxd <= 8'h1d;
#156 rxd <= 8'h8e;
#156 rxd <= 8'h7f;
#156 rxd <= 8'hce;
#156 rxd <= 8'h6f;
#156 rxd <= 8'h2d;
#156 rxd <= 8'h26;
#156 rxd <= 8'h17;
#156 rxd <= 8'h4d;
#156 rxd <= 8'hde;
#156 rxd <= 8'h2b;
#156 rxd <= 8'h5c;
#156 rxd <= 8'h6b;
#156 rxd <= 8'hfd;
#156 rxd <= 8'h1a;
#156 rxd <= 8'h5d;
#156 rxd <= 8'h2b;
#156 rxd <= 8'h4e;
#156 rxd <= 8'h2c;
#156 rxd <= 8'h8d;
#156 rxd <= 8'h1e;
#156 rxd <= 8'h8a;
#156 rxd <= 8'h1f;
#156 rxd <= 8'h8f;
#156 rxd <= 8'h1e;
#156 rxd <= 8'h8a;
#156 rxd <= 8'h1f;
#156 rxd <= 8'h8f;
#156 rxd <= 8'h1e;
#156 rxd <= 8'h8a;
#156 rxd <= 8'h1f;
#156 rxd <= 8'h8f;
eop = 1'b1;
rxdvld = 1'b0;
#156;
// 验证CRC32校验结果
if (crc32 == 32'hcbf43926) begin
$display("Test passed!");
end else begin
$display("Test failed!");
end
// 结束仿真
$finish;
end
endmodule
```
该测试激励代码通过设置输入信号的值,模拟了一帧以太网数据包的传输过程,并对输出的CRC32校验结果进行了验证。其中,输入信号的设置和验证结果可以根据实际情况进行调整。在验证过程中,如果输出的CRC32校验结果与预期结果一致,则输出"Test passed!",否则输出"Test failed!"并结束仿真。