Thread: [pyusb-users] usb.core.USBError: [Errno 110] Operation timed out

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pyusb-users

[pyusb-users] usb.core.USBError: [Errno 110] Operation timed out

From: Er. J. V. <jay...@gm...> - 2012-04-22 15:41:13

Hello Experts,>> Thanks for PyUSB.>> I've been trying to read data
from USB device.> Everything goes right, but I am not able to read
anything from it.>> Any help would be greatly appreciated.>> File
"/usr/local/lib/python2.7/dist-packages/usb/backend/libusb10.py",>
line 403, in _check>     raise USBError(_str_error[ret], ret,
_libusb_errno[ret])>> Thanks.>

My code:
dev = usb.core.find(idVendor=0x0590, idProduct=0x0028)
    if dev is None:
        print "Device not found"
    else:
        print "Device found"
        if dev.is_kernel_driver_active(0) is True:
            print "but we need to detach kernel driver"
            dev.detach_kernel_driver(0)
            print "claiming device"
            usb.util.claim_interface(dev, 0)
            print "release claimed interface"

        usb.util.release_interface(dev, 0)
        print 'Now reading data'
        #dev.attach_kernel_driver(0)

        dev.set_configuration()

        #dev.write(2,'Hello')
    #dev.write(1,'g')
        #dev.write(2,'VER00',0)

        ret = dev.read(0x81,8,0) # read(size,interface)
        print '::::::::::::::', ret

-- 

Thanks,
Regards,

*Er. Jay Vora*
M : 91 - 9879354457.
(Not miles, just an email away...)
Twitter <http://twitter.com/#%21/jaynvora>
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Blogger<http://jayvora.blogspot.com>
"No Seconds to be Wasted for Formalities, I have a lot to Execute !" - Jay
Vora

[pyusb-users] usb.core.USBError: [Errno 110] Operation timed out

From: Eddie A. G. <edd...@gm...> - 2017-03-18 23:43:23

Hello all:

I am using a Raspberry PI 3 in attempts to control my Owi Robotic Arm via
USB with Python scripting.  I am intermittently getting a "Operation timed
out" error which halts the code.  75% of the time the program runs from
start to finish with no problems.  Any ideas on how I can mitigate this?
Is there a way to increase the timeout threshold?  Many thanks in advance.

*Error:*

Traceback (most recent call last):

  File "arm2.py", line 59, in <module>

    MoveArm("ShoulderUp",4.2)

  File "arm2.py", line 47, in MoveArm

    RoboArm.ctrl_transfer(0x40,6,0x100,0,ArmCmd,3)

  File "build/bdist.linux-armv7l/egg/usb/core.py", line 711, in
ctrl_transfer

  File "build/bdist.linux-armv7l/egg/usb/backend/libusb1.py", line 836, in
ctrl_transfer

  File "build/bdist.linux-armv7l/egg/usb/backend/libusb1.py", line 571, in
_check

usb.core.USBError: [Errno 110] Operation timed out


*From my Python script:*

import usb.core, usb.util, time, sys

RoboArm = usb.core.find(idVendor=0x1267, idProduct=0x000)

if RoboArm is None:

raise ValueError("Arm not found")

Duration=1

def MoveArm(ArmCmd,Duration):

if ArmCmd == "Base+":

print "M5-%s : Rotate base clockwise" % Duration

ArmCmd=[0,1,0]

elif ArmCmd == "Base-":

print "M5+%s : Rotate base counter clockwise" % Duration

ArmCmd=[0,2,0]

elif ArmCmd == "ShoulderDown":

print "M4-%s : Shoulder down" % Duration

ArmCmd=[64,0,0]

elif ArmCmd == "ShoulderUp":

print "M4+%s : Shoulder up" % Duration

ArmCmd=[128,0,0]

elif ArmCmd == "ElbowDown":

print "M3-%s : Elbow down" % Duration

ArmCmd=[16,0,0]

elif ArmCmd == "ElbowUp":

print "M3+%s : Elbow up" % Duration

ArmCmd=[32,0,0]

elif ArmCmd == "WristDown":

print "M2-%s : Wrist down" % Duration

ArmCmd=[4,0,0]

elif ArmCmd == "WristUp":

print "M2+%s : Wrist up" % Duration

ArmCmd=[8,0,0]

elif ArmCmd == "GripClose":

print "M1-%s : Grip close" % Duration

ArmCmd=[2,0,0]

elif ArmCmd == "GripOpen":

print "M1+%s : Grip open" % Duration

ArmCmd=[1,0,0]

elif ArmCmd == "LightOff":

print "L1-%s : Light off" % Duration

ArmCmd=[0,0,1]

elif ArmCmd == "LightOn":

print "L1+%s : Light on" % Duration

ArmCmd=[0,0,0]

else:

print "Unknown command"

sys.exit()


RoboArm.ctrl_transfer(0x40,6,0x100,0,ArmCmd,3)

time.sleep(Duration)

ArmCmd=[0,0,0]

RoboArm.ctrl_transfer(0x40,6,0x100,0,ArmCmd,3)


#MoveArm("ShoulderUp",.1)

#sys.exit()


MoveArm("Base+",7.7)

MoveArm("ShoulderDown",4)

MoveArm("ElbowDown",1)

MoveArm("ElbowUp",1)

MoveArm("ShoulderUp",4.2)

MoveArm("Base-",8.4)

sys.exit()

Eddie A Goble