micropython中外部管脚中断功能的使用问题

key3 = Pin(("PF8", userfunc.mygetpinID("PF.8")), Pin.IN, None)
ii=0
def func(v):
    global ii
    ii=ii+1
    print("Hello rt-thread!,pin={},ii={}".format(v,ii))
key3.irq(trigger=Pin.IRQ_RISING, handler=func)