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hidl demo
This project forked from anlory/ledhidl
hidl demo
hidl demo 1. 以控制LED为例进行demo的编写 1.1 编写led.hal 和types.hal 1.2 执行update-makefiles.sh 编译文件 新建defalut文件夹 1.3 实现[email protected]和[email protected] 编写android.bp cc_library_shared { name: "[email protected]", defaults: ["hidl_defaults"], relative_install_path: "hw", proprietary: true, srcs: ["Consumerled.cpp"], shared_libs: [ "libhidlbase", "libhidltransport", "libhardware", "liblog", "libutils", "[email protected]", ], } cc_binary { relative_install_path: "hw", defaults: ["hidl_defaults"], name: "[email protected]", proprietary: true, init_rc: ["[email protected]"], srcs: ["service.cpp"], shared_libs: [ "liblog", "libhardware", "libhidlbase", "libhidltransport", "libutils", "[email protected]", ], } 接下来,使用相应功能填写存根并设置守护进程。守护进程代码(支持直通)示例: #include <hidl/LegacySupport.h> int main(int /* argc */, char* /* argv */ []) { return defaultPassthroughServiceImplementation<INfc>("nfc"); } defaultPassthroughServiceImplementation 将对提供的 -impl 库执行 dlopen() 操作,并将其作为绑定式服务提供。守护进程代码(对于纯绑定式服务)示例: int main(int /* argc */, char* /* argv */ []) { sp nfc = new Nfc(); const status_t status = nfc->registerAsService(); if (status != ::android::OK) { return 1; // or handle error } // join pool or do other things } add the code to the manifest.xm 以至于hwservicemanager 查找到指定的hidl service About HIDL configures device/linaro/hikey/manifest.xml <hal format="hidl"> <name>android.hardware.led</name> <transport>hwbinder</transport> <version>1.0</version> <interface> <name>ILed</name> <instance>default</instance> </interface> </hal> 2. 实现java调用hidl service的例子 2.1 添加库: 将以下内容添加到 Android.mk 中: LOCAL_JAVA_LIBRARIES += android.hardware.foo-V1.0-java 或 将以下内容添加到 Android.bp 中: shared_libs: [ /* … */ "android.hardware.foo-V1.0-java", ], 该库还存在静态版:android.hardware.foo-V1.0-java-static。 2.2 将以下内容添加到您的 Java 文件中: import android.hardware.foo.V1_0.IFoo; ... // retry to wait until the service starts up if it is in the manifest IFoo server = IFoo.getService(true /* retry */); // throws NoSuchElementException if not available IFoo anotherServer = IFoo.getService("second_impl", true /* retry */); server.doSomething(…); 3. 实现C++ 调用hidl service的例子 首先将 HAL 库添加到 makefile 中: Make:LOCAL_SHARED_LIBRARIES += [email protected] Soong:shared_libs: [ …, [email protected] ] 接下来,添加 HAL 头文件: #include <android/hardware/nfc/1.0/IFoo.h> … // in code: sp<IFoo> client = IFoo::getService(); client->doThing(); 4. 编写LED驱动
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