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  1.  
  2. import usb.core
  3. import usb.util
  5. #find our device
  6. dev = usb.core.find(idVendor=0x04D8, idProduct=0x0204)
  8. #was it found?
  9. if dev is None:
  10. raise ValueError('Device not found')
  12. #set the active configuration. with no args we use first config.
  13. dev.set_configuration()
  15. #get in and out endpoint instances
  16. ep_out = usb.util.find_descriptor(
  17. dev.get_interface_altsetting(), # first interface
  18. # match the first OUT endpoint
  19. custom_match = \
  20. lambda e: \
  21. usb.util.endpoint_direction(e.bEndpointAddress) == \
  22. usb.util.ENDPOINT_OUT
  23. )
  25. ep_in = usb.util.find_descriptor(
  26. dev.get_interface_altsetting(), # first interface
  27. # match the first IN endpoint
  28. custom_match = \
  29. lambda e: \
  30. usb.util.endpoint_direction(e.bEndpointAddress) == \
  31. usb.util.ENDPOINT_IN
  32. )
  34. #turn light on
  35. ep_out.write([0x080])
  37. #recieve data
  38. ep_out.write([0x081])
  39. ep_in.read(8)
  40.  
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