I arrived at requestType=64 based on USB spec since as per the specs (given
below)
#bmRequestType
##D7 Data Phase Transfer Direction
##0 = Host to Device
##1 = Device to Host
##D6..5 Type
##0 = Standard
##1 = Class
##2 = Vendor
##3 = Reserved
##D4..0 Recipient
##0 = Device
##1 = Interface
##2 = Endpoint
##3 = Other
##4..31 = Reserved
for...
Recipient - Device (first bit is 0)
Type - Vendor (seventh bit is 1)
Data Phase Transfer Direction - Host to Device (eigth bit 0)
which converts to 2 power 6 = 64. Am I missing anything?
>> the data do not seem to match the initial example
This is a different command. As per the vendor, this is the first command to
run on port open.
>> msg_str = binascii.unhexlify("020200013803")
Tried it, no difference.
On Mon, Jan 17, 2011 at 3:39 PM, Emmanuel Blot <eblot...@gmail.com> wrote:
> >> results = readerHandler.controlMsg(64, msg_str, data, timeout=1000)
> > The correct prototype for the method controlMsg is
> > controlMsg(requestType, request, buffer, value = 0, index = 0, timeout
> > = 100),
> > thus you should at least supply the requestType and request
> > parameters, which is not happening here. Notice that request value is
> > a value meaningful only to your request, but requestType is bit field
> > value with format specified in the USB spec.
>
> Moreover, the data do not seem to match the initial example
> >> msg_str = "020200013803"
> would likely be
> msg_str = binascii.unhexlify("020200013803")
>
> Cheers,
> Manu
>
>
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