libusbAndroidTest

Example of an Android app for testing libusb with Java and C++.

Why

Support for libusb in non rooted Android devices is still not properly solved ref, this repository tries combines the code from various repositories (references below) to generate an Android app to connect to usb devices combining Java and Native c++ code.

Compared to my other repository wiht only native Android code that used a version of libusb that is still not final, this repository uses the official libusb library version.

Usage

The modified libusb library is added as a submodule, so you will have to load the submodule either by clonning with the recursive flag or:

git clone https://github.com/ibaiGorordo/libusbAndroidTest.git
cd libusbAndroidTest
git submodule update --init

Output

The name of the connected device will appear on the screem. Extra information of the device is displayed in the logcat, you can check it by filtering for text contanining the LOG_TAG string (defined in libusb_utils.h and set to libusbNativeAndroidTest by default).

Example

I/libusbAndroidTest:
Dev (bus 1, device 2): 03E7 - 2485 speed: 480M
      Manufacturer:              Movidius Ltd.
      Product:                   Movidius MyriadX
      Serial Number:             03e72485
      Configuration:
        wTotalLength:            32
        bNumInterfaces:          1
        bConfigurationValue:     1
        iConfiguration:          0
        bmAttributes:            80h
        MaxPower:                250
        Interface:
          bInterfaceNumber:      0
          bAlternateSetting:     0
          bNumEndpoints:         2
          bInterfaceClass:       255
          bInterfaceSubClass:    17
          bInterfaceProtocol:    255
          iInterface:            0
          Endpoint:
            bEndpointAddress:    81h
            bmAttributes:        02h
            wMaxPacketSize:      512
            bInterval:           0
            bRefresh:            0
            bSynchAddress:       0
          Endpoint:
            bEndpointAddress:    01h
            bmAttributes:        02h
            wMaxPacketSize:      512
            bInterval:           0
            bRefresh:            0
            bSynchAddress:       0

References:

• Pull request to understand how to use libusb in Android with Java and C++ native code: libusb/libusb#830
• Repository where the libusb_utils.h functions were taken from: https://github.com/Peter-St/libusb