Android-app控制gpio

android-app控制gpio

该文档以操控gpio104为实验编写
实验目的：操控GPIO3_B00
实验现象：控制led灯开关。
android测试app已提供。

1、android-app必须添加签名文件。

app添加如下代码：android:sharedUserId="android.uid.system"

2、修改/OK3568-android11-source/device/rockchip/common/sepolicy/vendor/system_app.te文件添加内容：

allow system_app sysfs:file {write open};
allow system_app apk_data_file:dir write;

3、修改/OK3568-android11-source/system/sepolicy/private/coredomain.te文件

添加-system_app

4、修改/OK3568-android11-source/system/sepolicy/public/app.te文件

添加-system_app

5、执行拷贝命令

cp system/sepolicy/public/app.te system/sepolicy/prebuilts/api/30.0/public/app.te
cp system/sepolicy/private/coredomain.te system/sepolicy/prebuilts/api/30.0/private/coredomain.te

6、修改/OK3568-android11-source/device/rockchip/common/init.rockchip.rc添加内容：

on init
	write /sys/class/gpio/export 101
	write /sys/class/gpio/export 104
	write /sys/class/gpio/gpio101/direction in
	write /sys/class/gpio/gpio104/direction out
	chown system system /sys/class/gpio/gpio101/value
	chown system system /sys/class/gpio/gpio104/value
	chmod 0666 /sys/class/gpio/gpio101/value
	chmod 0666 /sys/class/gpio/gpio104/value

7、修改完以上内容，重新编译源码，烧写update.img。

forlinx@ubuntu: ~/3568/OK3568-android11-source $ source build/envsetup.sh 
forlinx@ubuntu: ~/3568/OK3568-android11-source $ lunch ok3568_r-userdebug 
forlinx@ubuntu: ~/3568/OK3568-android11-source $ ./build.sh -UKAup