The Libusb of the Road of android--4.2-3g transplantation (i.)

The previous time to the smart TV transplant 3G module, found that the transplant 3G Baidu Google a search, basically all Linux Development Board,

I am here to record the whole process of my transplant, let others less detours, what advice or not the welcome message ~

Writing is not easy, reproduced please specify the source: http://blog.csdn.net/jscese/article/details/39057033

I. Equipment identification

The current 3G module is USB interface, plug in the Android system will be recognized by default as a USB storage device, will try to mount as a USB storage device Vold!

So it is necessary to turn off the device type, converted into a modem type device, only in order to achieve normal communication between the host and the module, here need a conversion driver,

usb-modeswitch Open source Drive, download online: http://www.draisberghof.de/usb_modeswitch/#download

which also need to support the API library, source download: http://www.libusb.org/

Only if the 3G device is correctly identified by mode conversion, the porting of the API required by Usb-modeswitch is first resolved.

Two. Compiling Libusb/libusb-compat

The latest libusb-1.0.9 and libusb-compat-0.1.4 (compatible with long versions) can be downloaded from the above URLs.

Extracted to our Android source external , these two lib is for the back of the Usb_modeswitch service Dynamic library, can be directly on the Linux cross-compiling, and finally can get libusb.so Libusb-compat.so, compiling methods online there are many!

I think it is to the Android platform transplant, then I put into the external with the Android compilation mechanism to compile!

Add a android.mk to two folders below

First look at Libusb's android.mk:

#jscese Add this android.mk to compile libusb.so for Usb_modelswitch 140819local_path: = $ (call My-dir) include $ (clear_var S) COMMON_SRC: =libusb/core.c libusb/descriptor.c libusb/io.c libusb/sync.c libusb/os/linux_usbfs.c common_include: =$ (Local_path)/$ (Local_path)/libusb $ (local_path)/libusb/oslocal_module: = Libusblocal_src_files: =$ (COMMON_SRC) Local_c_includes +=$ (common_include) include $ (build_shared_library)

You can see the compiled. C source files as long as 5 is OK, we download the LIBUSB package inside some do not need to make some modifications and configuration,

My libusb source download: http://download.csdn.net/detail/jscese/7868431

Libusb-compat's ANDROID.MK:

#jscese Add this android.mk to compile libusb-compat.so for Usb_modelswitch 140819local_path: = $ (call My-dir) include $ (CL Ear_vars) Libusb_dir: =external/libusbcommon_src: =libusb/core.c common_include: =$ (Local_path)/$ (LOCAL_PATH)/ Libusb $ (libusb_dir)/libusblocal_module: = Libusb-compatlocal_src_files: =$ (COMMON_SRC) local_c_includes +=$ (common_ Include) Local_shared_libraries: = Libusbinclude $ (build_shared_library)

You can see Libusb-compat introducing LIBUSB

My libusb-compat source download: http://download.csdn.net/detail/jscese/7868445

Can be passed under the source code:

Mmm External/libusb

Compile the corresponding. So separately

Here first record Libusb transplant, step by step.

Android--4.2-3g Libusb of the transplant (i)