Re: [libusb] Open device on Android

[Xiaofan C. <xia...@gm...>]

On Thu, Mar 17, 2016 at 1:30 AM, Antão Almada <ant...@gm...> wrote:
>
> On Wed, Mar 16, 2016 at 12:54 AM Xiaofan Chen <xia...@gm...> wrote:
>> > I'm using Android USB Accessory mode where the connected device is
>> > the host and implements Android Open Accessory (AOA). My app is not
>> > running on the host and the issue now is that the device does not show
>> > up in the device enumeration... :(
>>
>> In that case,your issue has nothing to do with libusb. libusb is only
>> for the host side. But your Android device is not the host in this
>> mode. You should forget about libusb in this case.
>
>
> I don't believe that's true.

I am 100% sure libusb for Linux is only for the host side. If
Android is different from Linux in this regard, that will be
interesting to know.

Ref:
https://github.com/libusb/libusb/wiki/FAQ#Can_libusb_be_used_on_the_USB_device_side_eg_Linux_Gadget_Device

> An Android accessory is available as a /dev/usb_accessory file:
> https://books.google.pt/books?id=0cuQAwAAQBAJ&pg=PA93
>
> It requires some changes on the backend but I'm sure it is possible.

If you are sure go ahead to propose the changes.

> You'd better be sure about what you're saying before replying to
> emails on the mailing list.

Anyway I will stop here and maybe others can help you better.

-- 
Xiaofan