Hilo,
> -----Original Message-----
> From: Alastair Foster [mailto:[EMAIL PROTECTED]]
> Sent: Saturday, March 03, 2001 12:21 PM
> To: [EMAIL PROTECTED]
> Subject: [Linux-usb-users] Two Quick Questions
>
> I've got two quick (or maybe not so quick) questions for you guys:
>
> 1 - What does the following kernel debug message mean?
> "Mar 3 19:20:15 localhost kernel: usb.c: selecting invalid
> configuration 1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
It means that in usb_set_configuration() in
linux/drivers/usb.c, the new configuration value (1) could not
be found in the device's descriptors.
> Mar 3 19:20:17 localhost kernel: usbdevfs: USBDEVFS_BULK failed dev
> 2 ep 0x83 len 2054 ret -110"
> Is there an obvious cause, or could it mean anything?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
No obvious cause to me. It means ETIMEDOUT, i.e., the
USB transfer timed out. The device didn't respond.
> 2 - The device I am attempting to access has three configuration
> settings:
~~~~~~~~~~~~~~~~~~~~~~~~~~
Can you post the complete descriptor dump...at least the
numeric fields? You can x-out the strings if you need
to hide them.
> "Mar 3 19:20:09 localhost kernel: Alternate Setting: 0
> Mar 3 19:20:09 localhost kernel: bLength = 9
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 04
> Mar 3 19:20:09 localhost kernel: bInterfaceNumber = 00
> Mar 3 19:20:09 localhost kernel: bAlternateSetting = 00
> Mar 3 19:20:09 localhost kernel: bNumEndpoints = 03
> Mar 3 19:20:09 localhost kernel: bInterface
> Class:SubClass:Protocol = 00:00:00
> Mar 3 19:20:09 localhost kernel: iInterface = 00
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 01 (out)
> Mar 3 19:20:09 localhost kernel: bmAttributes = 03
> (Interrupt)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 0010
> Mar 3 19:20:09 localhost kernel: bInterval = 0a
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 02 (out)
> Mar 3 19:20:09 localhost kernel: bmAttributes =
> 02 (Bulk)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 0040
> Mar 3 19:20:09 localhost kernel: bInterval = 01
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 83 (in)
> Mar 3 19:20:09 localhost kernel: bmAttributes =
> 02 (Bulk)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 0040
> Mar 3 19:20:09 localhost kernel: bInterval = 01
> Mar 3 19:20:09 localhost kernel: Alternate Setting: 1
> Mar 3 19:20:09 localhost kernel: bLength = 9
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 04
> Mar 3 19:20:09 localhost kernel: bInterfaceNumber = 00
> Mar 3 19:20:09 localhost kernel: bAlternateSetting = 01
> Mar 3 19:20:09 localhost kernel: bNumEndpoints = 03
> Mar 3 19:20:09 localhost kernel: bInterface
> Class:SubClass:Protocol = 00:00:00
> Mar 3 19:20:09 localhost kernel: iInterface = 00
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 01 (out)
> Mar 3 19:20:09 localhost kernel: bmAttributes = 03
> (Interrupt)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 0010
> Mar 3 19:20:09 localhost kernel: bInterval = 0a
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 02 (out)
> Mar 3 19:20:09 localhost kernel: bmAttributes =
> 02 (Bulk)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 0040
> Mar 3 19:20:09 localhost kernel: bInterval = 01
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 03 (out)
> Mar 3 19:20:09 localhost kernel: bmAttributes =
> 02 (Bulk)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 0040
> Mar 3 19:20:09 localhost kernel: bInterval = 01
> Mar 3 19:20:09 localhost kernel: Alternate Setting: 2
> Mar 3 19:20:09 localhost kernel: bLength = 9
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 04
> Mar 3 19:20:09 localhost kernel: bInterfaceNumber = 00
> Mar 3 19:20:09 localhost kernel: bAlternateSetting = 02
> Mar 3 19:20:09 localhost kernel: bNumEndpoints = 03
> Mar 3 19:20:09 localhost kernel: bInterface
> Class:SubClass:Protocol = 00:00:00
> Mar 3 19:20:09 localhost kernel: iInterface = 00
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 01 (out)
> Mar 3 19:20:09 localhost kernel: bmAttributes = 03
> (Interrupt)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 0010
> Mar 3 19:20:09 localhost kernel: bInterval = 0a
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 02 (out)
> Mar 3 19:20:09 localhost kernel: bmAttributes =
> 02 (Bulk)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 0040
> Mar 3 19:20:09 localhost kernel: bInterval = 01
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 83 (in)
> Mar 3 19:20:09 localhost kernel: bmAttributes = 01
> (Isochronous)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 03f0
> Mar 3 19:20:09 localhost kernel: bInterval = 01
> Mar 3 19:20:09 localhost kernel: Alternate Setting: 3
> Mar 3 19:20:09 localhost kernel: bLength = 9
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 04
> Mar 3 19:20:09 localhost kernel: bInterfaceNumber = 00
> Mar 3 19:20:09 localhost kernel: bAlternateSetting = 03
> Mar 3 19:20:09 localhost kernel: bNumEndpoints = 03
> Mar 3 19:20:09 localhost kernel: bInterface
> Class:SubClass:Protocol = 00:00:00
> Mar 3 19:20:09 localhost kernel: iInterface = 00
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 01 (out)
> Mar 3 19:20:09 localhost kernel: bmAttributes = 03
> (Interrupt)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 0010
> Mar 3 19:20:09 localhost kernel: bInterval = 0a
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 82 (in)
> Mar 3 19:20:09 localhost kernel: bmAttributes =
> 02 (Bulk)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 0040
> Mar 3 19:20:09 localhost kernel: bInterval = 01
> Mar 3 19:20:09 localhost kernel: Endpoint:
> Mar 3 19:20:09 localhost kernel: bLength = 7
> Mar 3 19:20:09 localhost kernel: bDescriptorType = 05
> Mar 3 19:20:09 localhost kernel: bEndpointAddress =
> 03 (out)
> Mar 3 19:20:09 localhost kernel: bmAttributes = 01
> (Isochronous)
> Mar 3 19:20:09 localhost kernel: wMaxPacketSize = 03f0
> Mar 3 19:20:09 localhost kernel: bInterval = 01"
>
> I note that profile 1 has three out endpoint addresses, but
> no in endpoint
> addresses. What does this mean in practise? Does it mean that no data
> can be written to the device?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Control endpoint 0 is always available for input/output.
> --
> Alastair Foster
> http://users.netaccess.co.nz/ala/
> 021 250 6482
~Randy_________________________________________
|NOTE: Any views presented here are mine alone|
|& may not represent the views of my employer.|
-----------------------------------------------
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
http://lists.sourceforge.net/lists/listinfo/linux-usb-users
