Chris,
Have you tried to access sysfs directly frdom Java? I have not been
able to get this to work.
Could you provide a code fragment?
TIA
On Nov 23, 10:12 am, Chris Stratton <cs07...@gmail.com> wrote:
> On Nov 23, 5:33 am, Mikkel Christensen <mikkel.christen...@ixonos.com>
> wrote:
>
> > If the LED is already exposed in sysfs you are lucky and it should be
> > quite easy. Otherwise create a Kernel device driver that does the
> > exposure of the LED to sysfs.
>
> If it's already exposed in sysfs, you don't need to use native code.
> You should be able to access the special file directly from java if
> you have the permissions set right. If they are wrong, you can't
> access it from the ndk either.
>
> > Then in the /jni/native.cpp function do the proper write to the sysfs
> > entry like this (note: this depends on how the led is exposed trough
> > sysfs):
>
> > ret = system("echo 1 > /sys/class/leds/red/brightness");
>
> Chaining the echo command seems wasteful. Why not just write to the
> special file yourself?
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