Thanks Wander,
Device is not reset this time. I have removed the reset line.
But I am not receiving any response from the printer.
Do I have to delay some time for reading or
the recieved array is to be manipulated some way.
There is another code example that is in C and its working fine.
*Code:*
>
> #!/usr/bin/python
> import sys
> import usb.core
> import usb.util
> VENDOR_ID = 0x0dd4
> PRODUCT_ID = 0x01a8
> device = usb.core.find(idVendor=VENDOR_ID, idProduct=PRODUCT_ID)
> if device is None:
> sys.exit("Could not find Printer.")
> if device.is_kernel_driver_active(0):
> try:
> device.detach_kernel_driver(0)
> except usb.core.USBError as e:
> sys.exit("Could not detatch kernel driver: %s" % str(e))
> try:
> device.set_configuration()
> except usb.core.USBError as e:
> sys.exit("Could not set configuration: %s" % str(e))
>
> ################################################
> data = []
> read_complete = False
> print 'data written: ', device.write(2, [0x10])
> try:
> data = device.read( 2,6)
> except Exception as e:
> print e
> print 'data type: ', type(data)
> print 'received data: ', data
The output is still the same.
*Output:*
> # python hardware_monitor_printer.py
> data written: 1
> data type: <type 'array.array'>
> received data: array('B', [0, 0, 0, 0, 0, 0])
*Device info is:*
> Device:
> Device class: 0
> Device sub class: 0
> Device protocol: 0
> Max packet size: 64
> idVendor: 3540
> idProduct: 424
> Device Version: 281
> Configuration: 1
> Total length: 32
> selfPowered: 1
> remoteWakeup: 0
> maxPower: 4
> Interface: 0
> Alternate Setting: 0
> Interface class: 7
> Interface sub class: 1
> Interface protocol: 2
> Endpoint: 0x81
> Type: 2
> Max packet size: 64
> Interval: 0
> Endpoint: 0x2
> Type: 2
> Max packet size: 64
> Interval: 0
Could you please analyse the situation here....??
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