无法使用EDAPlayground编译器显示模拟

Question

我在 EDAPlayground.com 上尝试了 myHDL 手册中的以下代码，但它没有为我打印任何内容。谁能告诉我为什么以及如何解决这个问题？

我在网站上的配置概述如下。

Testbench+Design : Python only
Methodology : MyHDL 0.8

---

from random import randrange
from myhdl import *

    ACTIVE_LOW, INACTIVE_HIGH = 0, 1
    
    def Inc(count, enable, clock, reset, n):

    """ Incrementer with enable.

    count -- output
    enable -- control input, increment when 1
    clock -- clock input
    reset -- asynchronous reset input
    n -- counter max value

    """

    @always_seq(clock.posedge, reset=reset)
    def incLogic():
        if enable:
            count.next = (count + 1) % n

    return incLogic

    def testbench():

    count, enable, clock = [Signal(intbv(0)) for i in range(3)]
    
    # Configure your reset signal here (active type, async/sync)
    reset = ResetSignal(0,active=ACTIVE_LOW,async=True)
    
    

    ## DUT to be instantiated
    inc_1 = Inc(count, enable, clock, reset, n=4)

    HALF_PERIOD = delay(10)


    ## forever loop : clock generator
    
    @always(HALF_PERIOD)
    def clockGen():
        clock.next = not clock

    ## Stimulus generator
    @instance
    def stimulus():
        reset.next = ACTIVE_LOW
        yield clock.negedge
        reset.next = INACTIVE_HIGH
        for i in range(12):
            enable.next = min(1, randrange(3))
            yield clock.negedge
        raise StopSimulation

    @instance
    def monitor():
        print "enable  count"
        yield reset.posedge
        while 1:
            yield clock.posedge
            yield delay(1)
            print "   %s      %s" % (enable, count)

    return clockGen, stimulus, inc_1, monitor


    tb = testbench()
    
    def main():
        Simulation(tb).run()

Answer 1

最后需要调用main()函数。 例如，添加一行

main()

最后，或者更好的是，使用Python的习惯用法

if __name__=="__main__": 
     main()