Android的硬件接口HAL-2 HIDL

没写完哈。

不说废话，直接上干活。

1 创建HAL

2 生成桩代码

PACKAGE=vendor.xxx.hardware.logiuvc2@1.0
LOC=vendor/xxx/hardware/xxx2/1.0/default
hidl-gen -o $LOC -Lc++-impl -rvendor.xxx.hardware:vendor/xxx/hardware -randroid.hidl:system/libhidl/transport $PACKAGE

这里有个疑问是包名和路径的关系，回去在自己的板子上再试试吧。

3 增加hash

hidl-gen -Lhash -randroid.hardware.xxx:hardware/interfaces/xxx -randroid.hidl:system/libhidl/transport android.hardware.xxx@1.0 > hardware/interfaces/xxx/current.txt

4 生成Android.bp

source system/tools/hidl/update-makefiles-helper.sh

do_makefiles_update vendor.xxx.hardware:vendor/xxx android.hardware:hardware/interfaces android.hidl:system/libhidl/transport

5 在default中增加service.cpp

6 hw_get_module

7 在default中增加Android.bp

cc_binary {
    name: "android.hardware.xxx-service",
    defaults: ["hidl_defaults"],
    vendor: true,
    relative_install_path: "hw",
    srcs: [
        "service.cpp",
        "xxx.cpp"
    ],
    init_rc: ["android.hardware.xxx-service.rc"],
    shared_libs: [
        "vendor.xxx.hardware.xxx2@1.0",
        "libhidlbase",
        "libhidltransport",
        "liblog",
        "libutils",
    ],
    vintf_fragments: ["android.hardware.xxx-service.xml"],
}

8 android.hardware.xxx-service.xml

<name>vendor.xxx.hardware.xxx2</name>

<transport>hwbinder</transport>

<name>Ilogihid</name>

<instance>default</instance>

</interface>

</hal>

</manifest>

9 android.hardware.xxx-service.rc

service android.hardware.xxx-service /vendor/bin/hw/android.hardware.xxx-service

class hal

user system

group system

10 增加client

11 绕开Android12限制。

12 编译

使用mmm

13 兼容性矩阵

adb push compatibility_matrix.device.xml /system/etc/vintf/compatibility_matrix.device.xml
adb push compatibility_matrix.xml /vendor/etc/vintf/compatibility_matrix.xml
adb push android.hardware.tc_uvc-service.xml /vendor/etc/vintf/manifest/android.hardware.xxx-service.xml

14 使用脚本拷贝

scp scm@192.168.1.1:/LINUX/android/out/target/product/kalama/vendor/bin/hw/android.hardware.tc_uvc-service .
adb push android.hardware.xxx-service /vendor/bin/hw
scp scm@192.168.1.1:/LINUX/android/out/target/product/kalama/system/bin/xxx_test .
adb push xxx_test /vendor/bin
#scp scm@192.168.1.1:/LINUX/android/out/target/product/kalama/vendor/lib/hw/vendor.xxx.hardware.xxx2@1.0-impl.so .
#adb push vendor.hardware.test@1.0-impl.so /vendor/lib/hw
scp scm@192.168.1.1:/LINUX/android/out/target/product/kalama/vendor/lib/vendor.xxx.hardware.xxx2@1.0.so .
adb push vendor.xxx.hardware.xxx2@1.0.so /vendor/lib
scp scm@192.168.1.1:/LINUX/android/out/target/product/kalama/vendor/lib64/vendor.xxx.hardware.xxx2@1.0.so .
adb push vendor.xxx.hardware.xxx2@1.0.so /vendor/lib64

15 关闭tee

adb setenforce 0

16 运行

开两个窗口

。。。

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