[sane-devel] USB-Sniff Help

[m. allan noah]

On Mon, 24 Jul 2006, Tabor Kelly wrote:

> I am still wading through this log 
> (http://tabor.taborandtashell.net/sane-fs2720u/turned_on.LOG). There are a 
> couple of places I get confused. If somebody could explain exactly what is 
> happening, that would be extremely helpful.
>
> Here is the first place:
>
>>>>>>>> URB 55 going down...	  Status = 00000000	--

cant help you on that. as it happens before the usb config has been set, 
it may be part of some firmware upload, etc.

> And here is the second:

urb 57 is a standard SCSI inquiry, padded to 12 bytes long with nulls.

so, urb 58 is the scanners response. it says:

0000: 06 00 02 02 1f 00 00 10 43 41 4e 4f 4e 20 20 20
  'i am a scanner, i speak SCSI2, 0x1f bytes remain, i support sync,
   my mother is CANON padded to 8 chars with spaces'

0010: 49 58 2d 32 37 30 32 35 45 20 20 20 20 20 20 20
  'my name is IX-27025E padded to 16 bytes with spaces'

0020: 31 2e 31 33
  'my version is 1.13'

its like the matrix. eventually you dont see the code anymore :)

allan

-- 
"so don't tell us it can't be done, putting down what you don't know.
money isn't our god, integrity will free our souls" - Max Cavalera