打通的HDF驱动，更多内容请访问：与华为官方共建的鸿蒙技术社区https://harmonyos.51cto。com的老规矩，最后还是放出了你要跑出来的效果。如下：前言如果你看过第二篇文章，你可能会发现，本文中的内核态驱动直接引用了源码中已经存在的一个HDF驱动模块。所以本文着重解决这个问题，即自己配置一个HDF驱动模块。本文基于3516小系统进行验证。观察本文框架图中的上图。事实上，这篇文章进一步提炼了上述过程。上面的驱动程序分为三部分，分别是：HCS文件配置、内核态代码、编译进内核的liteos_a配置。这三个部分共同构成了构建您自己的HDF驱动程序的步骤。1、HDF配置这里的HDF配置是根据源码中已有的sample_driver模块打开vendor/hisilicon/hispark_taurus/hdf_config/hdf_test/hdf_test_manager/device_info.hcs文件，然后在下面的代码中添加device2。device1::deviceNode{policy=2;priority=10;preload=0;permission=0644;moduleName="sample_driver";serviceName="sample_service";}device2::deviceNode{//DeviceNodeofthesampledriverpolicy=2;//Driverservicereleasepolicy.Fordetails,见DriverServiceManagement.priority=10;//Driver启动优先级(0-200)。值越大优先级越低。推荐使用默认值100。如果优先级相同，则设备加载顺序随机。preload=0;//按需加载驱动程序。详见本节末尾的“NOTE”。permission=066666666;//为驱动程序创建节点4;//为驱动程序创建任务权限moduleName="talkweb_driver";//Drivername.ThevalueofthisfieldmustbethesameasthevalueofmoduleNameinthedriverentrystructure.serviceName="talkweb_service";//Nameoftheservicereleasedbythedriver.Thenamemustbeunique.}}device_platform_test::device{platform_test::deviceNode{policy=1;priority=150;preload=0;permission=0644；模块名称=“PLATFORM_TEST_DRIVER";serviceName="PLATFORM_TEST";deviceMatchAttr="platform_test";}}2.liteos_a编译配置这一步是将第三步的驱动编译进内核2.1在BUILD.gn文件中配置打开drivers/adapter/khdf/liteos/test/BUILD.gn文件---a/khdf/liteos/test/BUILD.gn+++b/khdf/liteos/test/BUILD。gn@@-37,6+37,7@@hdf_driver(模块名称){sources=["$HDF_TEST_FRAMWORK_ROOT/common/hdf_main_test.c","$HDF_TEST_FRAMWORK_ROOT/manager/sample_driver_test.c",+"$HDF_TEST_FRAMWORK_ROOT/talkwebtest/talkweb.c","$HDF_TEST_FRAMWORK_ROOT/osal/osal_all_test.c","$HDF_TEST_FRAMWORK_ROOT/osal/osal_file_test.c","$HDF_TEST_FRAMWORK_ROOT/osal/osal_get_case_test.c",2.2在Makefile中进行添加配置drivers/adapter/khdf/liteos/test/Makefile---a/khdf/liteos/test/Makefile+++b/khdf/liteos/test/Makefile@@-34,6+34,7@@HDF_TEST_FRAMWORK_ROOT=$(LITEOSTOPDIR)/../../drivers/framework/test/unittestLOCAL_SRCS:=$(HDF_TEST_FRAMWORK_ROOT)/common/hdf_main_test.c\$(HDF_TEST_FRAMWORK_ROOT)/manager/sample_driver_test.c\+$(HDF_TEST_FRAMWORK_ROOT)/talkwebtest/talkweb.c\$(HDF_TEST_FRAMWORK_ROOT)/osal/osal_test_entry.c\$(HDF_TEST_FRAMWORK_ROOT)/osal/osal_all_test.c\$(HDF_TEST_FRAMWORK_ROOT)/osal/osal_file_test.c\3。驱动进入drivers/framework/test/unittest目录，新建talkwebtest目录。3.1Createanewtalkweb.hfileintheabovedirectory.下述代码放入#ifndefHDF_SAMPLE_DRIVER_H#defineHDF_SAMPLE_DRIVER_H#include"hdf_object.h"#defineSAMPLE_SERVICE"sample_service"typedefenum{SAMPLE_DRIVER_REGISTER_DEVICE=0,SAMPLE_DRIVER_UNREGISTER_DEVICE,SAMPLE_DRIVER_SENDEVENT_SINGLE_DEVICE,SAMPLE_DRIVER_SENDEVENT_BROADCAST_DEVICE,SAMPLE_DRIVER_PM_STATE_INJECT,}SAMPLE_DRIVER_CMDID;structHdfDeviceObject*GetDeviceObject(void);#endif//HDF_MAIN_TEST_H3.2在上述目录新建talkweb.c文件，将以下代码放入/**Copyright(c)2020-2021HuaweiDeviceCo.,Ltd.**HDFisduallicensed：您可以根据*GPL或BSD许可证的条款使用它们，这是您的选择。*请参阅此存储库根目录中的许可文件以获取完整的详细信息。*/#include"talkweb.h"#include"devsvc_manager_clnt.h"#include"devmgr_service.h"#include"hdf_log.h"#include"hdf_device_desc.h"#include"hdf_pm.h"#include"device_resource_if.h"#include"osal_io.h"#include"osal_mem.h"#include"gpio_if.h"#include"osal_irq.h"#include"osal_time.h"//#defineHDF_LOG_TAGled_driver//打印日志所包含的标签，如果不定义则用默认>定义的HDF_TAG标签#defineLED_WRITE_READ88#defineHDF_LOG_TAGsample_driver_test#ifndefINT32_MAX#defineINT32_MAX0x7fffffff#endifvoidHdftalkwebDriverRelease(structHdfDeviceObject*deviceObject){(void)deviceObject;return;}int32_ttalkwebDriverRegisterDevice(structHdfSBuf*data){constchar*moduleName=NULL;constchar*serviceName=NULL;structHdfDeviceObject*devObj=NULL;if(data==NULL){returnHDF_FAILURE;}moduleName=HdfSbufReadString(data);if(moduleName==NULL){returnHDF_FAILURE;}serviceName=HdfSbufReadString(data);if(serviceName==NULL){returnHDF_FAILURE;}devObj=HdfRegisterDevice(moduleName,serviceName,NULL);if(devObj==NULL){returnHDF_FAILURE;}returnHDF_SUCCESS;}intDr32iverUnregisterDevice(structHdfSBuf*data){constchar*moduleName=NULL;constchar*serviceName=NULL;if(data==NULL){returnHDF_FAILURE;}moduleName=HdfSbufReadString(data);if(moduleName==NULL){returnHDF_FAILURE;}serviceName=HdfSbufReadString(数据);if(serviceName==NULL){returnHDF_FAILURE;}HdfUnregisterDevice(moduleName,serviceName);returnHDF_SUCCESS;}int32_ttalkwebDriverSendEvent(structHdfDeviceIoClient*client,intid,structHdfSBuf*data,boolbroadcast){returnbroadcast?HdfDeviceSendEvent,(客户端->id、数据）：HdfDeviceSendEventToClient（客户端、id、数据）；}int32_ttalkwebDriverPowerStateInject（uint32_tpowerState）{intret；structIDevmgrService*devmgrService=DevmgrServiceGetInstance（）；if（devmgrService==NULL||devmgrService->PowerStateChange==NULL）{returnHDF_ERR_INVALID_OBJECT；}ret=devmgrService->PowerStateChange(devmgrService,powerState);HDF_LOGI("%s:injectpowerstate(%d)done,ret=%d",__func__,powerState,ret);returnret;}staticint32_tCtlLED(intmode){int32_tret;uint16_tvalRead;/*LEDGPIO引脚号*/uint16_tgpio=5*8+1;//红外补光//uint16_tgpio=2*8+3;//绿光//uint16_tgpio=3*8+4;//红色LED/*将GPIO引脚配置为输出*/ret=GpioSetDir(gpio,GPIO_DIR_OUT);if(ret!=0){HDF_LOGE("GpioSerDir:failed,ret%d\n",ret);returnret;}if(mode==-1){//翻转输出端口(void)GpioRead(gpio,&valRead);ret=GpioWrite(gpio,(valRead==GPIO_VAL_LOW)?GPIO_VAL_HIGH:GPIO_VAL_LOW);}else{ret=GpioWrite(gpio,mode);}if(ret!=0){HDF_LOGE("GpioWrite:failed,ret%d\n",ret);returnret;}returnret;}int32_ttalkwebDriverDispatch(structHdfDeviceIoClient*client,intcmdId,structHdfSBuf*data,structHdfSBuf*reply){HDF_LOGD("%s::qzk-enter",__func__);uint32_tpowerState=0;int32_tret=HDF_SUCCESS;if(reply==NULL||client==NULL){returnHDF_FAILURE;}int32_tresult=HDF_FAILURE;switch(cmdId){caseLED_WRITE_READ:constchar*recv=HdfSbufReadString(data);if(recv!=NULL){//HDF_LOGI("recv:%s",recv);result=CtlLED(-1);//CtlLED(GPIO_VAL_HIGH);if(!HdfSbufWriteInt32(回复,结果)){//HDF_LOGE("replayisfail");}returnHdfDeviceSendEvent(client->device,cmdId,data);}break;caseSAMPLE_DRIVER_REGISTER_DEVICE:{ret=talkwebDriverRegisterDevice(data);HdfSbufWriteInt32(reply,ret);break;}caseSAMPLE_DRIVER_UNREGISTER_DEVICE:ret=talkwebdriverunregisterdevice（data）;hdfsbufwriteInt32（回复，ret）;break;casespample_driver_sendevent_single_device：ret=ret=talkwebdriversendevent（client，client，cmdid，cmdid，cmdid，cmdid，data，data，data，false，false）;数据，真）；HdfSbufWriteInt32（回复，INT32_MAX）；中断；caseSAMPLE_DRIVER_PM_STATE_INJECT：HdfSbufReadUint32（数据，&powerState）；returntalkwebDriverPowerStateInject（powerState）；默认：中断；}returnret；}intHdftalkwebDriverBind（structHdfDeviceObject*deviceObject）{staticstructIDeviceIrDriverDisptestService,.Open=NULL,.Release=NULL,};HDF_LOGD("%s::enter",__func__);if(deviceObject==NULL){returnHDF_FAILURE;}deviceObject->service=&testService;returnHDF_SUCCESS;}intHdftalkwebDozeResume(structHdfDeviceObject*deviceObject){HDF_LOGI("%s:called",__func__);returnHDF_SUCCESS;}intHdftalkwebDozeSuspend(structHdfDeviceObject*deviceObject){HDF_LOGI("%s:called",__func__);returnHDF_SUCCESS;}intHdftalkwebResume(structHdfDeviceObject*deviceObject){HDF_LOGI("%s:called",__func__);returnHDF_SUCCESS;}intHdftalkwebSuspend(structHdfDeviceObject*deviceObject){HDF_LOGI("%s:called",__func__);returnHDF_SUCCESS;}structtalkwebDriverPmListener{structIPowerEventListenerpowerListener;void*p;};intHdftalkwebDriverInit(structHdfDeviceObject*deviceObject){staticstructtalkwebDriverPmListenerpmListener={0};intret;HDF_LOGI("%s::enter!",__func__);if(deviceObject==NULL){HDF_LOGE("%s::ptrisnull!",__func__);returnHDF_FAILURE;}HDF_LOGE("%s:Initsuccess",__func__);pmListener.powerListener.DozeResume=HdftalkwebDozeResume；pmListener.powerListener.DozeSuspend=HdftalkwebDozeSuspend；pmListener.powerListener.Resume=HdftalkwebResume；pmListener.powerListener.Suspend=HdftalkwebSuspend；ret=HdfPmRegisterPowerListener（deviceObject，&pmListener.powerListener）；HDF_LOGI（“，ret=registerpower%listd",__func__,ret);returnHDF_SUCCESS;}structHdfDriverEntryg_talkwebDriverEntry={.moduleVersion=1,.moduleName="talkweb_driver",.Bind=HdftalkwebDriverBind,.Init=HdftalkwebDriverInit,.Release=HdftalkwebDriverRelease,};HDF_INIT(Driver_)应用状态程序这里的应用状态程序的代码和编译方式可以直接采用上面的，这里只需要修改宏SAMPLE_SERVICE_NAME即可。#defineSAMPLE_SERVICE_NAME"talkweb_service"更多信息请访问：与华为官方共建的鸿蒙科技社区https://harmonyos.51cto.com
