acmepins.py 文件源码

def wait_edge(fd,pin,callback,debouncingtime):
    debouncingtime=debouncingtime/1000
    timestampprec=time.time()
    counter=0
    po = select.epoll()
    po.register(fd,select.EPOLLET)
    while True:
        events = po.poll()
        timestamp=time.time()
        if (timestamp-timestampprec>debouncingtime) and counter>0:
            callback(pin)
        counter=counter+1
        timestampprec=timestamp