Excellent documentation! I will keep that in mind thank you very much!
Kaan
2010/9/3 Sarah Messer <ikust...@yahoo.com>
> For pyusb documentation, try this site:
>
> http://wiki.erazor-zone.de/wiki:projects:python:pyusb:pydoc
>
> It's pretty sparse; to understand what the methods are and how to use
> them, you'll need to be familiar with the USB spec, try downloading
> documents from
>
> http://www.usb.org/developers/docs/
>
> The following is a little special-purpose script I used to test
> communication with Tektronix TDS 2014B oscilloscopes. The English strings
> embedded in the RUN, STOP, and ID variables will have to change for any
> other hardware, and different devices will differ a bit on the other
> specifics. Also note the code has hard-coded the logical location of the
> scope on the bus, which it shouldn't do for general use.
>
> Your mileage may vary, but hopefully this'll be a useful signpost for
> getting started...
>
> #These are commands to be send to the Bulk-OUT
> endpoint
> # (OUT <=> Host -> Device, IN <=> Device ->
> Host)
> #see USBTMC spec. for
> details
> #Byte 0: \x01 - this is a command, no response
> allowed
> # \x02 - this is a query, response
> required
> #Byte 1: bTag - byte tag, msg #, increments with each
> transaction
> #Byte 2: !bTag - one's complement of
> bTag
> #Byte 3: \x00
> always
>
> #Bytes 4-7: Number of bytes in payload, excl. header & alignment bytes
> # LSB first
> #Byte 8: For a command:
> # \x01 if this is the last transfer for this message,
> # \x00 otherwise
> # For a query:
> # \x02 Response must terminate w/ specified TermChar
> # \x00 Response ignores TermChar (see Byte 9)
> #Byte 9: For a command: \x00 always
> # For a query: TermChar (see Byte 8)
> #Bytes 10-11: \x00\x00 always
> RUN='\x01\x01\xfe\x00\x0e\x00\x00\x00\x01\x00\x00\x00acq:state
> run\n\x00\x00'
> STOP='\x01\x01\xfe\x00\x0e\x00\x00\x00\x01\x00\x00\x00acq:state
> stop\x00\x00'
> ID='\x01\x01\xfe\x00\x05\x00\x00\x00\x01\x00\x00\x00*idn?\x00\x00\x00'
> REQ_IN='\x02\x02\xfd\x00\x00\x01\x00\x00\x00\x00\x00\x00'
> import usb
> dev=usb.busses()[3].devices[0]#bus & device number may vary
> print dev.idVendor #Tektronix = 1689L = x0699
> print dev.idProduct #TDS 2014B = 872L = x0368
> hand=dev.open()
> print hand
> conf=dev.configurations[0]
> intf=conf.interfaces[0][0]
> hand.reset()
> print 'reset complete'
> #hand.setConfiguration(conf)
> hand.claimInterface(intf)
> print 'claimed'
> #hand.setAltInterface(0)
> hand.bulkWrite(6,ID,4000) #write to a bulk-out endpoint
> hand.bulkWrite(6,REQ_IN,4000) #write to a bulk-out endpoint
> stuff=hand.bulkRead(133,256)#read from a bulk-in endpoint
>
>
>
> -Sarah
>
> --- On *Wed, 9/1/10, Kaan AKŞİT <kun...@gmail.com>* wrote:
>
>
> From: Kaan AKŞİT <kun...@gmail.com>
> Subject: [pyusb-users] Documentation
> To: pyusb-users@lists.sourceforge.net
> Date: Wednesday, September 1, 2010, 2:51 AM
>
>
> Dear all,
>
> I am having hard time to find a manual or a documentation that explains
> each function in pyusb library. Unfortunately, I could not find anything
> beside this: http://pyusb.sourceforge.net/docs/1.0/tutorial.html
>
> Best regards,
> Kaan
>
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