On 18/08/13 13:01, Anton Smirnov wrote:
Android can return file descriptor for native code:
http://developer.android.com/reference/android/hardware/usb/UsbDeviceConnection.html#getFileDescriptor()
<http://developer.android.com/reference/android/hardware/usb/UsbDeviceConnection.html#getFileDescriptor%28%29>
Does libusbx support it?
Not currently. It would be quite a change to be able to support it as
libusb would need to map the open file descriptor back to a bus and
device, which would be hard.
An alternative choice would be to add an Android backend which makes use
of JNI to invoke the UsbDeviceConnection APIs, although that would be
equally tricky.
What are you trying to do?
If you want to get a list of devices for use with libusb you should call
the libusb API for it ( libusb_get_device_list). If you want to use the
android.hardware.usb.* APIs to access the device you should use those APIs.
Also libusb or android has the next issue for ftdi-devices:
https://code.google.com/p/android/issues/detail?id=58873
I'm not familiar with libftdi, but even if libusb somehow supported the
android.hardware.usb.* APIs, wouldn't you need to make changes to
libftdi to get it to call the passing file descriptor APIs?
Regards,
Toby
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