I'm trying to program (upload new messages to) a scrolling LED badge via python on Linux instead of via the windows exe. I've got a capture of a successful upload via the windows app that I'll use as a template, but at the moment I'm having trouble writing anything at all to the device.
When I run my script, I get an assertion error, which I assume means that no OUT endpoints have been found. lsusb seems to corroborate this, but I could be mistaken. This is basically straight from the pyusb tutorial with alternate_setting removed from intf because it was causing a pipe error and is apparently not necessary.
intf = usb.util.find_descriptor(cfg, bInterfaceNumber = interface_number,)
ep = usb.util.find_descriptor(
intf,
# match the first OUT endpoint
custom_match = \
lambda e: \
usb.util.endpoint_direction(e.bEndpointAddress) == \
usb.util.ENDPOINT_OUT
)
assert ep is not None # < assertion error
In case it helps, lsusb -vv for the LED badge: http://bpaste.net/show/biixy6e38A71WlCw7euU/
Any guidance would be much appreciated - I'm entirely new to USB protocol, and not great at python either.
