[Pyusb-users] no such file or directory

[sreeraj r <rsr...@gm...>]

hello guys,
                    i am really new to usb programming so plz help
i am trying to access kingsun dazzle irda via pyusb



import usb
from struct import *

vendor_id= 0x07d0
product_id= 0x4100
supported_speeds =
[2400,9600,19200,38400,57600,115200,576000,1152000,4000000,0]
bRequestType= 0x21
bRequest  =   0x09
wValue    =   0x0200
wIndex    =   0x0001
wLength   =   0x0008
hello=[]
buffer = pack('lhh',115200,0x03,0)

def find_dazzle():
    buses = usb.busses()
    for bus in buses :
        for device in bus.devices :
            if device.idVendor == vendor_id :
                            if device.idProduct == product_id :
                                print "found ksdazzle"
                    return device

if __name__=="__main__":
    device=find_dazzle()
    for alt in device.configurations[0].interfaces[0]:
        for ep in alt.endpoints:
            print "endpoint:",hex(ep.address)
    handle=device.open()
    handle.reset()
    handle.setConfiguration(1)
    handle.claimInterface(0)
    r=handle.controlMsg(bRequestType,bRequest,buffer,wValue,wIndex,10000)
    #while 1:
    #    r=handle.interruptRead(1,2048,10000)
    #    print r
    handle.releaseInterface()


while running the above program ie while sending that contol message i
receive the following error

found ksdazzle
endpoint: 0x81
endpoint: 0x2
Traceback (most recent call last):
  File "a.py", line 33, in ?
    r=handle.controlMsg(bRequestType,bRequest,buffer,wValue,wIndex,10000)
usb.USBError: error sending control message: No such file or directory

my demsg shows this

usb 1-1: reset low speed USB device using ohci_hcd and address 2
usb 1-1: usbfs: process 16850 (python) did not claim interface 1 before use

plz helppppppppp

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