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""" |
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* PyDMXControl: A Python 3 module to control DMX using uDMX. |
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* Featuring fixture profiles, built-in effects and a web control panel. |
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* <https://github.com/MattIPv4/PyDMXControl/> |
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* Copyright (C) 2022 Matt Cowley (MattIPv4) ([email protected]) |
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""" |
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from queue import Queue, Empty |
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from threading import Thread |
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from typing import List |
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from pyudmx import pyudmx |
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from ._transmittingController import transmittingController |
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class uDMXController(transmittingController): |
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def __init__(self, *args, **kwargs): |
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# Device information |
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self.__udmx_vendor_id = kwargs.pop("udmx_vendor_id", 0x16c0) |
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self.__udmx_product_id = kwargs.pop("udmx_product_id", 0x5dc) |
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self.__udmx_bus = kwargs.pop("udmx_bus", None) |
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self.__udmx_address = kwargs.pop("udmx_address", None) |
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# Store the device |
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self.__udmx = None |
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self.__connect() |
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# Create the queue |
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self.__queue = Queue() |
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thread = Thread(target=self.__runner, daemon=True) |
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thread.start() |
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# Create the parent controller |
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super().__init__(*args, **kwargs) |
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def close(self): |
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# uDMX |
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self.__drain() |
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self.__queue.put(None) |
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self.__queue.join() |
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self.__udmx.close() |
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print("CLOSE: uDMX closed") |
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# Parent |
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super().close() |
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def _send_data(self): |
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self.__queue.put_nowait((self.get_frame(), self.first_channel if self.dynamic_frame else 1)) |
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def __runner(self): |
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while True: |
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# Get next item in queue, or wait for item |
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item = self.__queue.get() |
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# None is passed to end the runner |
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if item is None: |
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self.__queue.task_done() |
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break |
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# Transmit current frame |
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self.__transmit(*item) |
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self.__queue.task_done() |
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# Drain excess frames as they are generated more frequently than uDMX can transmit |
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self.__drain() |
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def __transmit(self, frame: List[int], first: int): |
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# Attempt to send data max 5 times, then 2 more with reconnect to device |
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# Thanks to Dave Hocker (pyudmx author) for giving me this solution to the random usb errors |
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success = False |
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retry_count = 0 |
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while not success: |
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try: |
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if retry_count > 5: |
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self.__connect() |
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self.__udmx.send_multi_value(first, frame) |
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success = True |
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except Exception as e: |
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retry_count += 1 |
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if retry_count > 7: |
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raise e |
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def __connect(self): |
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# Try to close if exists |
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if self.__udmx is not None: |
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try: |
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self.__udmx.close() |
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except Exception: |
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pass |
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# Get new device |
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self.__udmx = pyudmx.uDMXDevice() |
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self.__udmx.open(self.__udmx_vendor_id, self.__udmx_product_id, self.__udmx_bus, self.__udmx_address) |
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def __drain(self): |
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while not self.__queue.empty(): |
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try: |
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self.__queue.get(False) |
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except Empty: |
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continue |
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self.__queue.task_done() |
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MattIPv4 /
PyDMXControl
