Hi,
I am a newbie in Android embedded!
I used to develop Linux devices drivers, and now I try to do the same under
Android.
I used beaglebone black board with kernel 3.8 and jelly bean
I compiled my kernel and a basic module call drv.ko
*Q1*: In my module Android.mk I put LOCAL_PREBUILT_EXECUTABLES
It seems to be correct, but is there a LOCAL_*OPTIONS* specific to kernel
modules ?
*Q2*: Actually I can load this driver with adb shell . I would like to load
this driver at start up?
Should I modify file init.rc or init_am335evm.rc like that?
on device-added /system/lib/modules/drv.ko
chmod 777 /dev/drv
or with /etc/modules ?
or both?
I also developed a shared library found in /system/lib/libdriver.so
And in order to use my driver since graphic interface, I developed a jni
interface call lib_jni_drv.so (/system/lib/lib_jni_drv.so)
My big problem is the fact that my app do not have read/write permission
acces to /dev/driver through libdriver.so
logcat :
> E/Trace(1257): error opening trace file: Permission denied (13)
I load my app since eclipse for Android.
I add these line in my manifest.xml
> <uses-permission
> android:name="android.permission.ACCESS_SUPERUSER"></uses-permission>
*Q3*: What should I put in manifest.xml in order to have read/write access
to devices /dev/your_devices?
*Q4*: Do you have any tutorial, website, books which explain, how to use
Android in low-level?
I prefer to work in side and after ask question if needed.
Except Embedded Android by karim yaghmour I didn't find anything related to
this subject.
Thanks by advance
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