On Friday, November 2, 2012 3:07:24 PM UTC+5:30, vincent wrote: > > Hi All, > > I am newer of Android and Linux. Now I am doing a task which > request to access GPIO in hwc.c or Surfaceflinger.cpp. > > (I am using a panda board, and have light up it, now I want to > modify something). > > You could try using user-space GPIO access. In the kernel documentation, check Documentation/gpio.txt. Basically, this boils down to # echo GPIO_NUMBER > /sys/class/gpio/export # echo DIRECTION > /sys/class/gpio/direction # echo VALUE > /sys/class/gpio/value After you export the GPIO to user-space, you'd want to restrict permissions to the user-space GPIO node. I'd do this in some of the init scripts.
HTH -- Shree -- unsubscribe: [email protected] website: http://groups.google.com/group/android-porting
