Message: 4 Date: Wed, 12 Dec 2007 21:41:15 +0100 From: Sebastian Friebe <[EMAIL PROTECTED]> Subject: Re: [python-win32] USB access using win32file.deviceIOcontrol To: Python-Win32 List <python-win32@python.org> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=us-ascii
Tim Roberts wrote: TR> That's fundamentally correct. How are you creating the TR> SCSI_PASS_THROUGH structure in "byte_list"? Are you sure it is 42 TR> bytes? Are you setting all the fields correctly? How are you setting TR> the DataBuffer pointer? Have you set the Length field correctly? Don't forget the data direction variable. That's equally as important. You'll light up your screen blue as the day, if you get a driver which isn't robust. Test unit read does not transfer any data so the data transfer length should be zero, in the CDB and the data direction must variable must be set to whatever indicates no data transfer. >>cdbLength = 16 I would think the CDB should be set to 6, since test unit ready is a 6-buye command, but if 16 worked in your C++ example, tha should be fine here too. >>But I don't have an idea at all, how to port it to Python. Tim mentioned the struct module, and I would agree, but there may be other ways. class SCSI_PASS_THROUGH_DIRECT(object): >>But again, I don't know how to handle the buffer pointers inside the structure. Nor do I. You may have to call a DLL from Python to pass a pointer to the SCSI pass thru layer. There may be a way to do this with ctypes though. _______________________________________________ python-win32 mailing list python-win32@python.org http://mail.python.org/mailman/listinfo/python-win32