Hi everybody, this is my first time in this list, so I apologize in advance
if this is not the way to contact you.
I am newer with pyusb and I am having a trouble that I am not able to solve
by myself, so I would appreciate any help you can give me.
I am trying to obtain diverse information from a USB device. I have the
communication protocol (so I know what commands I have to write) and I am
working under Ubuntu 10.04 The problem is that I am always getting
"Operation Timed Out" error after reading, so I am not able to read
anything.
This is my code: (any comment would be extra-appreciated)
import usb.core
import usb.util
import usb
import sys
command ="0x0000 0x0000 0x0000 0x0000 0x0000 0x0000"
dev = usb.core.find(idVendor=0x0590, idProduct=0x0028)
if dev is None:
raise ValueError('Device not found')
dev.set_configuration()
#Find endpoints
ep_out = usb.util.find_descriptor(
dev.get_interface_altsetting(), # first interface
# match the first OUT endpoint
custom_match = \
lambda e: \
usb.util.endpoint_direction(e.bEndpointAddress) == \
usb.util.ENDPOINT_OUT
)
ep_in = usb.util.find_descriptor(
dev.get_interface_altsetting(), # first interface
# match the first OUT endpoint
custom_match = \
lambda e: \
usb.util.endpoint_direction(e.bEndpointAddress) == \
usb.util.ENDPOINT_IN
)
a=ep_out.write(st)
ret=ep_in.read(64, timeout=12000)
print ret
Thank you in advance!!
*
--
Begoña Fuentes*
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