USB Timeout (again)

[TedHerman]

I've encountered a repeatable timeout problem with the most recent libfitbit.

1. To confirm it's the most recent version, here's what I did:

   herman@touring:~/fitbit/libfitbit$ git log | head -n 5
   commit ee607b24c57b19872959c4ab8edf4dbeed5404d3
   Author: qdot 
   Date:   Sun Aug 7 22:21:36 2011 -0700
   Made libusb base core reset on open, making communication much more reliable
   
   

2. Unplug, then replug fitbit. Now, log of running the test:

   Script started on Mon 08 Aug 2011 05:24:47 PM CDT
   herman@touring:~/fitbit/libfitbit/python$ su
   root@touring:/home/herman/fitbit/libfitbit/python# python fitbit.py
   Traceback (most recent call last):
     File "fitbit.py", line 351, in 
       sys.exit(main())
     File "fitbit.py", line 317, in main
       if not base.open():
     File "/home/herman/fitbit/libfitbit/python/antprotocol/bases.py", line 24, in open
       if not super(FitBitANT, self).open(vid, pid):
     File "/home/herman/fitbit/libfitbit/python/antprotocol/libusb.py", line 78, in open
       self._check_reset_response(0x80)
     File "/home/herman/fitbit/libfitbit/python/antprotocol/protocol.py", line 127, in _check_re
   set_response
       data = self._receive()
     File "/home/herman/fitbit/libfitbit/python/antprotocol/libusb.py", line 91, in _receive
       r = self._connection.read(self.ep['in'], size, 0, self.timeout)
     File "/usr/lib/python2.6/site-packages/usb/core.py", line 637, in read
       self.__get_timeout(timeout)
     File "/usr/lib/python2.6/site-packages/usb/_debug.py", line 52, in do_trace
       return f(*args, **named_args)
     File "/usr/lib/python2.6/site-packages/usb/backend/libusb10.py", line 493, in bulk_read
       timeout)
     File "/usr/lib/python2.6/site-packages/usb/backend/libusb10.py", line 593, in __read
       timeout))
     File "/usr/lib/python2.6/site-packages/usb/backend/libusb10.py", line 357, in _check
       raise USBError(_str_error[retval.value])
   usb.core.USBError: Operation timed out
   

3. Background info.

   Linux kernel:  Linux version 2.6.37.6-smp (root@midas) (gcc version 4.5.2 (GCC) ) #2 SMP Sat Ap
   r 9 23:39:07 CDT 2011
   Distro:  Slackware 13.37.0
   Vmlinuz config:  config-huge-smp-2.6.37.6-smp:
   CONFIG_USB_EHCI_HCD=y
   
   CONFIG_USB_EHCI_ROOT_HUB_TT=y
   
   CONFIG_USB_EHCI_TT_NEWSCHED=y
   
   CONFIG_USB_OXU210HP_HCD=y
   
   CONFIG_USB_ISP116X_HCD=y
   
   CONFIG_USB_ISP1760_HCD=y
   
   CONFIG_USB_ISP1362_HCD=y
   
   CONFIG_USB_OHCI_HCD=y
   CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
   CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
   CONFIG_USB_OHCI_LITTLE_ENDIAN=y
   
   CONFIG_USB_UHCI_HCD=y
   
   CONFIG_USB_U132_HCD=m
   
   CONFIG_USB_SL811_HCD=y
   
   CONFIG_USB_SL811_CS=m
   
   CONFIG_USB_R8A66597_HCD=y
   
   CONFIG_USB_WHCI_HCD=m
   
   CONFIG_USB_HWA_HCD=m
   
   

4. Tail of /var/log/messages showing device unplug/replug:

   Aug  8 17:19:57 touring kernel: [27583.000141] usb 4-1: USB disconnect, address 12
   Aug  8 17:20:01 touring kernel: [27586.665026] usb 4-1: new full speed USB device using uhci_hcd and address 13
   Aug  8 17:20:01 touring kernel: [27586.819034] usb 4-1: New USB device found, idVendor=10c4, idProduct=84c4
   Aug  8 17:20:01 touring kernel: [27586.819043] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
   Aug  8 17:20:01 touring kernel: [27586.819049] usb 4-1: Product: Fitbit Base Station
   Aug  8 17:20:01 touring kernel: [27586.819054] usb 4-1: Manufacturer: Silicon Labs
   Aug  8 17:20:01 touring kernel: [27586.819058] usb 4-1: SerialNumber: 01014A9BF5F4E37402014A9BF5F4
   

[reedwade]

I'm running into this same problem also.

But not so much now. I had been reliably failing with usb.core.USBError: Operation timed out exception as above but..

I commented out
self._check_reset_response(0x80)
at line 78 of libusb.py

I reran and got different errors. So I put that back.

I then reran and got a successful sync (!)

So, I ran it again and got this--

Traceback (most recent call last):
  File "fitbit_client.py", line 137, in <module>
    sys.exit(main())
  File "fitbit_client.py", line 132, in main
    f = FitBitClient()
  File "fitbit_client.py", line 86, in __init__
    if not base.open():
  File "/home/reed/fitbit/libfitbit/python/antprotocol/bases.py", line 24, in open
    if not super(FitBitANT, self).open(vid, pid):
  File "/home/reed/fitbit/libfitbit/python/antprotocol/libusb.py", line 78, in open
    self._check_reset_response(0x80)
  File "/home/reed/fitbit/libfitbit/python/antprotocol/protocol.py", line 127, in _check_reset_response
    data = self._receive()
  File "/home/reed/fitbit/libfitbit/python/antprotocol/libusb.py", line 96, in _receive
    raise ANTReceiveException("Checksums for packet do not match received values!")
antprotocol.protocol.ANTReceiveException: Checksums for packet do not match received values!

I run it again and get successful sync.

Then run it again and get the checksum error.

then, success, alternating back and forth -- I can sync but I need to run and fail first.

One more piece of info, this is with a fitbit ultra.