2011/11/29 Eric Hewett <eric.hew...@gmail.com>:
> print dev.ctrl_transfer(0x60, 0x09, msg, 0, len(msg))
This line makes no sense. Your bmRequestValue is invalid in USB 2.0 (I
haven't read the 3.0 spec yet). What are you trying to do? Send msg?
Please take a look at ctrl_transfer reference:
| ctrl_transfer(self, bmRequestType, bRequest, wValue=0,
wIndex=0, data_or_wLength=None, timeout=None)
| Do a control transfer on the endpoint 0.
|
| This method is used to issue a control transfer over the
| endpoint 0(endpoint 0 is required to always be a control endpoint).
|
| The parameters bmRequestType, bRequest, wValue and wIndex are the
| same of the USB Standard Control Request format.
|
| Control requests may or may not have a data payload to write/read.
| In cases which it has, the direction bit of the bmRequestType
| field is used to infere the desired request direction. For
| host to device requests (OUT), data_or_wLength parameter is
| the data payload to send, and it must be a sequence type convertible
| to an array object. In this case, the return value is the
number of data
| payload written. For device to host requests (IN), data_or_wLength
| is the wLength parameter of the control request specifying the
| number of bytes to read in data payload. In this case, the return
| value is the data payload read, as an array object.
--
Best Regards,
Wander Lairson Costa
https://github.com/walac
https://gitorious.org/~walac
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