[libhid-discuss] libhid with python: help appreciated

[JamesPK]

Hi,

Apologies for what might be a basic libhid question.

I'm running Ubuntu, and using libhid via Python to communicate with a 
HID device (and have used 'lsusb' to glean all the details of the device).

I've started out with the example code here: 
http://anonscm.debian.org/viewvc/libhid/trunk/swig/test_libhid.py .I 
added  the vendor and product ID and the example code itself worked FINE.

I then added some code to the example. From the 'snooping' on the 
communication with the device under Windows it needs a control message 
with an initialisation string to initialise the device, which I thought 
would be:

INIT_SEQ='0x20 0x00 0x08 0x01 0x00 0x00 0x00 0x00'
ret = hid_interrupt_write(hid, 0, INIT_SEQ, 8)
  if ret != HID_RET_SUCCESS:
         log_error("hid_set_output_report", ret)

But when I added the above spinet to the example and run it I get:
(ALL messages fine up to here)
---------------------
NOTICE: hid_force_open(): successfully opened USB device 006/002[0].
   TRACE: hid_reset_parser(): resetting the HID parser for USB device 
006/002[0]...
   TRACE: hid_dump_tree(): iterating the parse tree for USB device 
006/002[0]...
   TRACE: hid_reset_parser(): resetting the HID parser for USB device 
006/002[0]...
   TRACE: hid_interrupt_write(): writing interrupt report to device 
006/002[0] ...
WARNING: hid_interrupt_write(): failed to perform interrupt write to 
device 006/002[0]: error submitting URB: No such file or directory
---------------------

Any ideas/pointers would be much appreciated.

Thanks

James