On 30/08/2012 00:45, Adam W. wrote:
On Wednesday, August 29, 2012 6:56:16 PM UTC-4, Dennis Lee Bieber wrote:
BUT you do give a possible clue. Is the OP using a 3.x Python where
strings are Unicode -- in which case the above may need to be explicitly
declared as a "byte string" rather than text (unicode) string.
Huzzah! I am indeed using 3.x, and slapping on an .encode('utf-8') made my
printer try to spit paper at me! Progress.
Also, astute observation about the endpoint needing to be an input, with the
following modification I get:
ep.write('\x1BA'.encode('utf-8'))
2
ep = usb.util.find_descriptor(
intf,
custom_match = \
lambda e: \
usb.util.endpoint_direction(e.bEndpointAddress) == \
usb.util.ENDPOINT_IN
)
ep.read(1)
array('B', [163])
Anyone want to venture a guess on how I should interpret that? It seems the
[163] is the byte data the manual is talking about, but why is there a 'B'
there? If I put paper in it and try again I get: array('B', [3])
Thanks for all your help guys, just about ready to stared coding the fun part!
The result is an array of bytes ('B'). I think the value means:
0b10100011
^Ready
^Top of form
^No paper
^Printer error
The error is that it's out of paper.
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