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当我测试我的数据流模块时，我所有的输入都是无关紧要的。我不确定问题出在哪里。可能是我的方程式还是我的测试台本身？

这是我的代码。

数据流：

module TollSystem(weekDay,rushHour,lateNight,highTraffic,lowRate,mediumRate,highRate);

input weekDay,rushHour,lateNight,highTraffic;

output lowRate,mediumRate,highRate;

assign #6 lowRate = ~weekDay&~rushHour&lateNight&~highTraffic | 
weekDay&~rushHour&lateNight&~highTraffic;

assign #6 mediumRate = (~rushHour&~lateNight&~highTraffic) | (~weekDay&~lateNight&~highTraffic) | 
(rushHour&lateNight);

assign #6 highRate = (weekDay&~lateNight&rushHour) | 
(~lateNight&highTraffic|~rushHour&lateNight&highTraffic);

endmodule

试验台：

module TollSystemtest();

reg weekDay,rushHour,lateNight,highTraffic;

wire lowRate,mediumRate,highRate;

TollSystem TSys(weekDay,rushHour,lateNight,highTraffic,lowRate,mediumRate,highRate);

initial
begin

 weekDay=0;rushHour=0;lateNight=0;highTraffic=0;
 weekDay=0;rushHour=0;lateNight=0;highTraffic=1;
 weekDay=0;rushHour=0;lateNight=1;highTraffic=0;
 weekDay=0;rushHour=0;lateNight=1;highTraffic=1;
 weekDay=0;rushHour=1;lateNight=0;highTraffic=0;
 weekDay=0;rushHour=1;lateNight=0;highTraffic=1;
 weekDay=0;rushHour=1;lateNight=1;highTraffic=0;
 weekDay=0;rushHour=1;lateNight=1;highTraffic=1;
 weekDay=1;rushHour=0;lateNight=0;highTraffic=0;
 weekDay=1;rushHour=0;lateNight=0;highTraffic=1;
 weekDay=1;rushHour=0;lateNight=1;highTraffic=0;
 weekDay=1;rushHour=0;lateNight=1;highTraffic=1;
 weekDay=1;rushHour=1;lateNight=0;highTraffic=0;
 weekDay=1;rushHour=1;lateNight=0;highTraffic=1;
 weekDay=1;rushHour=1;lateNight=1;highTraffic=0;
 weekDay=1;rushHour=1;lateNight=1;highTraffic=1;



$finish();
end
endmodule

输入/输出结果：

[ 测试台输出1

4

1 回答 1

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当我运行您的代码时，模拟在时间 0 结束。由于没有时间流逝，因此您的输入报告为 x/z 也就不足为奇了。您需要在测试台中添加延迟。例如：

initial
begin
         weekDay=0;rushHour=0;lateNight=0;highTraffic=0;
    #20; weekDay=0;rushHour=0;lateNight=0;highTraffic=1;
    #20; weekDay=0;rushHour=0;lateNight=1;highTraffic=0;
    #20; weekDay=0;rushHour=0;lateNight=1;highTraffic=1;
    #20; weekDay=0;rushHour=1;lateNight=0;highTraffic=0;
    #20; weekDay=0;rushHour=1;lateNight=0;highTraffic=1;
    #20; weekDay=0;rushHour=1;lateNight=1;highTraffic=0;
    #20; weekDay=0;rushHour=1;lateNight=1;highTraffic=1;
    #20; weekDay=1;rushHour=0;lateNight=0;highTraffic=0;
    #20; weekDay=1;rushHour=0;lateNight=0;highTraffic=1;
    #20; weekDay=1;rushHour=0;lateNight=1;highTraffic=0;
    #20; weekDay=1;rushHour=0;lateNight=1;highTraffic=1;
    #20; weekDay=1;rushHour=1;lateNight=0;highTraffic=0;
    #20; weekDay=1;rushHour=1;lateNight=0;highTraffic=1;
    #20; weekDay=1;rushHour=1;lateNight=1;highTraffic=0;
    #20; weekDay=1;rushHour=1;lateNight=1;highTraffic=1;
    $finish();
end

现在，当我运行仿真并查看波形时，我看到所有信号都变为已知值。

我添加了一个延迟#20，但您应该将其更改为对您的设计更有意义的东西。

于 2021-05-15T16:14:06.990 回答