acmepins.py 文件源码

def add_event_detect(pin, value, callback, debouncingtime):
    iopath=get_gpio_path(pinname2kernelid(pin))
    if os.path.exists(iopath): 
        fd = open(iopath + '/value','w')
        fd.write(str(value))
    else:
        return

    kernel_id=pinname2kernelid(pin)
    if fd!=None:
        set_edge(kernel_id,value)
        thread.start_new_thread(wait_edge,(fd,pin,callback,debouncingtime))
        return
    else:       
        thread.exit()

    fd.close()


#End of RPi.GPIO wrapper functions