eds.py 文件源码

def import_from_node(node_id, network):
    # Create temporary SDO client
    sdo_client = SdoClient(0x600 + node_id, 0x580 + node_id, None)
    sdo_client.network = network
    # Subscribe to SDO responses
    network.subscribe(0x580 + node_id, sdo_client.on_response)
    # Create file like object for Store EDS variable
    try:
        eds_fp = ReadableStream(sdo_client, 0x1021)
        eds_fp = io.BufferedReader(eds_fp)
        eds_fp = io.TextIOWrapper(eds_fp, "ascii")
        od = import_eds(eds_fp, node_id)
    except Exception as e:
        logger.error("No object dictionary could be loaded for node %d: %s",
                     node_id, e)
        od = None
    finally:
        network.unsubscribe(0x580 + node_id)
    return od