>>>>> "Xiaofan" == Xiaofan Chen <xiaofanc@xxxxxxxxx> writes:
Xiaofan> On Mon, Jul 27, 2009 at 5:47 PM, Uwe
Xiaofan> Bonnes<bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>> Is there perhaps an API to find out if setting the configuration is
>> needed?
>>
>> Perhaps we can make the code dependant on that?
>>
Xiaofan> If libftdi switches to libusb 1.0 (it should be trival to
Xiaofan> switch to the synchronous API of libusb 1.0), then you can use
Xiaofan> this API function: libusb_get_configuration. You check if the
Xiaofan> configuration is valid (typically 1), then you can skip
Xiaofan> libusb_set_configuration(). If it is zero, then you call
Xiaofan> libusb_set_configuration().
Xiaofan> http://libusb.sourceforge.net/api-1.0/group__dev.html
Xiaofan> There are other advantages to switch to libusb 1.0 since it
Xiaofan> supports asynchronous transfer. Currently it is only working
Xiaofan> under Linux and Mac OS X.
Xiaofan> For libusb 0.1, there is no direct API function to do this.
Xiaofan> But you can probably do similar things.
There is one disadvantage:
There is libusb-0.1 for Win32, but no libusb-1 yet.
For example my xc3sprog uses libusb-0.1 for Win32.
Bye
--
Uwe Bonnes bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
--
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
To unsubscribe send a mail to libftdi+unsubscribe@xxxxxxxxxxxxxxxxxxxxxxx
|
