环境

$ cat /etc/os-release
NAME="Ubuntu"
VERSION="20.04.5 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.5 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal
 

tool下载

https://github.com/technexion-android/platform_external_libgpiod.git https://github.com/technexion-android/platform_external_libgpiod.git%C2%A0android/external$ tree platform_external_libgpiod/
platform_external_libgpiod/
├── Android.bp
├── COPYING
├── include
│   ├── gpiod.h
│   └── linux
│       └── gpio.h
├── README
└── src
    ├── lib
    │   ├── config.h
    │   ├── core.c
    │   ├── ctxless.c
    │   ├── helpers.c
    │   ├── iter.c
    │   └── misc.c
    └── tools
        ├── gpiodetect.c
        ├── gpiofind.c
        ├── gpioget.c
        ├── gpioinfo.c
        ├── gpiomon.c
        ├── gpioset.c
        ├── tools-common.c
        └── tools-common.h

5 directories, 19 files
 

 tool编译

source build/envsetup.sh
lunch rk3576_u-userdebug

mmm external/platform_external_libgpiod/

放到板子 

adb push out\target\product\rk3576_u\system\lib64\libgpiod.so /data/local/tmp
adb push out\target\product\rk3576_u\system\bin\gpiodetect /data/local/tmp
adb push out\target\product\rk3576_u\system\bin\gpiofind /data/local/tmp
adb push out\target\product\rk3576_u\system\bin\gpioget /data/local/tmp
adb push out\target\product\rk3576_u\system\bin\gpioinfo /data/local/tmp
adb push out\target\product\rk3576_u\system\bin\gpiomon /data/local/tmp
adb push out\target\product\rk3576_u\system\bin\gpioset /data/local/tmp
export LD_LIBRARY_PATH=/data/local/tmp
export PATH=/data/local/tmp:$PATH

设置环境

export LD_LIBRARY_PATH=/data/local/tmp
export PATH=/data/local/tmp:$PATH 

 gpiodetect

rk3576_u:/ # gpiodetect
gpi