harmony 鸿蒙Light

  • 2022-08-09
  • 浏览 (941)

Light

概述

功能简介

Light驱动模型为上层Light硬件服务层提供稳定的灯控制能力接口，包括获取灯类型、配置点灯模式、配置灯闪烁效果、点灯、熄灯等。基于HDF（Hardware Driver Foundation）驱动框架开发的Light驱动模型，实现跨操作系统迁移，器件差异配置等功能。实现Light驱动“一次开发，多系统部署”的目标。Light驱动模型如图1示：

图 1 Light驱动模型图

Light驱动模型图

运作机制

通过介绍Light驱动模型的加载以及运行流程，对模型内部关键组件以及关联组件之间的关系进行了划分，整体加载流程如图2所示：

图 2 Light驱动运行图

Light驱动运行图

以标准系统RK3568为例，介绍Light模块驱动加载及运行流程：

  1. Device Manager从device_info.hcs配置文件中读取Light设备管理配置信息。
  2. Device Manager从light_config.hcs配置文件中读取Light数据配置信息。
  3. HCS Parser解析Light设备管理配置信息，加载对应的Light Host，并控制Host完成驱动的加载。
  4. Light Proxy获取到Light HDI接口服务实例后，通过IPC（Inter-Process Communication）调用到Light Stub。
  5. Light Stub主要处理与IPC相关的业务逻辑，完成参数反序列化后调用Light Controller。
  6. Light Controller中是HDI接口的真正实现，通过IPC调用Light抽象驱动接口，进一步操作Light硬件设备。

开发指导

场景介绍

灯设备的控制，在实际生活中比比皆是，例如短信通知时闪灯、终端电量不足时预警、充电时根据充电进度变换灯的颜色等等。这些动作的实现，都需要使用Light驱动模型提供的接口，动态配置点灯模式、配置灯闪烁效果、点灯、熄灯等。

接口说明

Light驱动模型支持获取系统中所有灯的信息、动态配置闪烁模式和闪烁时间的能力。Light硬件服务调用GetLightInfo获取Light设备的基本信息，调用TurnOnLight接口启动配置的闪烁效果，调用TurnOffLight接口关闭Light设备。Light驱动模型对外开放的API接口能力，参考表1。

表1 Light驱动模型对外API接口能力介绍

注：以下接口列举的为C接口，接口声明见文件/drivers/peripheral/light/interfaces/include。

接口名 功能描述
int32_t (*GetLightInfo)(struct LightInfo **lightInfo, uint32_t *count) 获取当前系统中所有类型的灯信息，lightInfo表示指向灯信息的二级指针，count表示指向灯数量的指针。
int32_t (*TurnOnLight)(uint32_t lightId, struct LightEffect *effect) 根据指定的灯类型ID打开列表中的可用灯，lightId表示灯类型ID，effect表示指向灯效果的指针。
int32_t (*TurnOffLight)(uint32_t lightId) 根据指定的灯类型ID关闭列表中的可用灯。
int32_t (*TurnOnMultiLights)(uint32_t lightId, const struct LightColor *colors, const uint32_t count); 根据指定的灯类型ID打开相应灯光中包含的多个子灯光。

开发步骤

基于HDF驱动框架，按照驱动Driver Entry程序，完成Light驱动开发，资源配置及HCS配置文件解析。

  1. 灯驱动在Light Host中的配置信息。

    • Light HCS文件代码路径：vendor\hihope\rk3568\hdf_config\khdf\device_info\device_info.hcs。

    • 具体代码实现如下：

     /* Light设备HCS配置 */
 light :: host {
     hostName = "light_host";
     device_light :: device {
         device0 :: deviceNode {
             policy = 2;                           // 驱动服务发布的策略（0：不提供服务，1：对内核态发布服务；2：对内核态和用户态都发布服务）
             priority = 100;                       // Light驱动启动优先级（0-200），值越大优先级越低，建议配置为100，优先级相同则不保证device的加载顺序
             preload = 0;                          // 驱动按需加载字段，0：加载；2：不加载
             permission = 0664;                    // 驱动创建设备节点权限
             moduleName = "HDF_LIGHT";             // Light驱动名称，该字段的值必须和驱动入口结构的moduleName值一致
             serviceName = "hdf_light";            // Light驱动对外发布服务的名称，必须唯一
             deviceMatchAttr = "hdf_light_driver"; // 驱动私有数据匹配的关键字，必须和驱动私有数据配置表中的match_attr值相等
         }
     }
 }

  2. 灯驱动私有HCS配置：

    • 代码实现路径：vendor\hihope\rk3568\hdf_config\khdf\light\light_config.hcs。

    • 具体代码实现如下：

     root {
     lightConfig {
         boardConfig {
             match_attr = "hdf_light_driver";
             lightAttr {
                 light01 {
                     lightId = [1];    // Lightid可以包含多个逻辑灯光ID，例如：1表示电源指示灯。
                     lightName = "battery";
                     lightNumber = 1;
                     busRNum = 147;    // Light的效果颜色红色对应GPIO值。
                     busGNum = 146;    // Light的效果颜色绿色对应GPIO值。
                     busBNum = 149;    // Light的效果颜色蓝色对应GPIO值。
                     defaultBrightness = 0X00FFFFFF;    // 系统默认亮度值，B：0-7位，R：8-15位，G：16-23，扩展位24-31位。
                     onTime = 50;    // 当闪光灯亮起时，系统支持的最短持续时间（以毫秒为单位）。
                     offTime = 50;    // 当闪光灯熄灭时，系统支持的最短持续时间（以毫秒为单位）。
                 }
             }
         }
     }
 }

  3. 灯驱动代码实现路径为： drivers\hdf_core\framework\model\misc\light\driver\src\light_driver.c。

    • 灯驱动对应的HdfDriverEntry对象，其中，Driver Entry入口函数定义如下：
     /* 注册灯入口数据结构体对象 */
 struct HdfDriverEntry g_lightDriverEntry = {
     .moduleVersion = 1,            // 灯模块版本号
     .moduleName = "HDF_LIGHT",     // 灯模块名，要与device_info.hcs文件里灯moduleName字段值一样
     .Bind = BindLightDriver,       // 灯绑定函数
     .Init = InitLightDriver,       // 灯初始化函数
     .Release = ReleaseLightDriver, // 灯资源释放函数
 };
 /* 调用HDF_INIT将驱动入口注册到HDF框架中，在加载驱动时HDF框架会先调用Bind函数，再调用Init函数加载该驱动。当Init调用异常时，HDF框架会调用Release释放驱动资源并退出 */
 HDF_INIT(g_lightDriverEntry);
    • 灯驱动Bind接口实现示例如下：
     /* Light驱动对外提供的服务绑定到HDF框架 */
 int32_t BindLightDriver(struct HdfDeviceObject *device)
 {
     struct LightDriverData *drvData = NULL;


     CHECK_LIGHT_NULL_PTR_RETURN_VALUE(device, HDF_FAILURE);
 	/* 私有接口分配资源 */
     drvData = (struct LightDriverData *)OsalMemCalloc(sizeof(*drvData));
     CHECK_LIGHT_NULL_PTR_RETURN_VALUE(drvData, HDF_ERR_MALLOC_FAIL);
 	/* 需要发布的接口函数 */
     drvData->ioService.Dispatch = DispatchLight;
     drvData->device = device;
     device->service = &drvData->ioService;
     g_lightDrvData = drvData;


     return HDF_SUCCESS;
 }
    • 灯驱动Init接口实现示例如下：
     /* Light驱动初始化入口函数*/
 int32_t InitLightDriver(struct HdfDeviceObject *device)
 {
     struct LightDriverData *drvData = NULL;


     drvData = (struct LightDriverData *)device->service;


     if (OsalMutexInit(&drvData->mutex) != HDF_SUCCESS) {
         return HDF_FAILURE;
     }
 	/* 工作队列初始化 */
     if (HdfWorkQueueInit(&drvData->workQueue, LIGHT_WORK_QUEUE_NAME) != HDF_SUCCESS) {
         return HDF_FAILURE;
     }
 	/* 工作项初始化 */
     if (HdfWorkInit(&drvData->work, LightWorkEntry, (void*)drvData) != HDF_SUCCESS) {
         return HDF_FAILURE;
     }
 	/* 解析HCS配置文件 */
     if (GetLightConfigData(device->property) != HDF_SUCCESS) {
         return HDF_FAILURE;
     }
 	/* 设置GPIO引脚方向 */
     if (SetLightGpioDir(drvData) != HDF_SUCCESS) {
         return HDF_FAILURE;
     }


     return HDF_SUCCESS;
 }
    • 灯驱动Release接口在驱动卸载或者Init执行失败时，会调用此接口释放资源，具体实现如下：
     /* 释放Light驱动初始化时分配的资源 */
 void ReleaseLightDriver(struct HdfDeviceObject *device)
 {
     int32_t i;
     struct LightDriverData *drvData = NULL;
     /* 释放已分配资源 */
     for (i = LIGHT_ID_NONE; i < LIGHT_ID_BUTT; ++i) {
         if (drvData->info[i] != NULL) {
             OsalMemFree(drvData->info[i]);
             drvData->info[i] = NULL;
         }
     }
 	/* 器件在位，销毁工作队列资源 */
     HdfWorkDestroy(&drvData->work);
     HdfWorkQueueDestroy(&drvData->workQueue);
     (void)OsalMutexDestroy(&drvData->mutex);
     OsalMemFree(drvData);
     g_lightDrvData = NULL;
 }
    • 灯驱动从HCS文件中解析Light设备管理配置信息。
     /* 从HCS文件中获取Light基础配置 */
 static int32_t GetLightBaseConfigData(const struct DeviceResourceNode *node, const struct DeviceResourceIface *parser,
     uint32_t lightId)
 {
     int32_t ret;
     uint32_t *defaultBrightness = NULL;
     struct LightDriverData *drvData = NULL;
     const char *name = NULL;


     drvData = GetLightDrvData();
     CHECK_LIGHT_NULL_PTR_RETURN_VALUE(drvData, HDF_ERR_INVALID_PARAM);
     CHECK_LIGHT_NULL_PTR_RETURN_VALUE(node, HDF_ERR_INVALID_PARAM);
     CHECK_LIGHT_NULL_PTR_RETURN_VALUE(parser, HDF_ERR_INVALID_PARAM);
 	/* 类型作为下标开辟空间 */
     drvData->info[lightId] = (struct LightDeviceInfo *)OsalMemCalloc(sizeof(struct LightDeviceInfo));
     if (drvData->info[lightId] == NULL) {
         HDF_LOGE("%s: malloc fail", __func__);
         return HDF_FAILURE;
     }
 	 /* 将Light设备信息进行填充 */
     ret = parser->GetUint32(node, "busRNum", (uint32_t *)&drvData->info[lightId]->busRNum, 0);
     if (ret != HDF_SUCCESS) {
         drvData->info[lightId]->busRNum = LIGHT_INVALID_GPIO;
     }


     ret = parser->GetUint32(node, "busGNum", (uint32_t *)&drvData->info[lightId]->busGNum, 0);
     if (ret != HDF_SUCCESS) {
         drvData->info[lightId]->busGNum = LIGHT_INVALID_GPIO;
     }


     ret = parser->GetUint32(node, "busBNum", (uint32_t *)&drvData->info[lightId]->busBNum, 0);
     if (ret != HDF_SUCCESS) {
         drvData->info[lightId]->busBNum = LIGHT_INVALID_GPIO;
     }


     ret = parser->GetString(node, "lightName", &name, NULL);
     if (ret != HDF_SUCCESS) {
         HDF_LOGE("%s:get lightName failed!", __func__);
         return HDF_FAILURE;
     }


     if (strcpy_s(drvData->info[lightId]->lightInfo.lightName, NAME_MAX_LEN, name) != EOK) {
         HDF_LOGE("%s:copy lightName failed!", __func__);
         return HDF_FAILURE;
     }


     ret = parser->GetUint32(node, "lightNumber", (uint32_t *)&drvData->info[lightId]->lightInfo.lightNumber, 0);
     if (ret != HDF_SUCCESS) {
         HDF_LOGE("%s:get lightNumber failed!", __func__);
         return HDF_FAILURE;
     }


     defaultBrightness = (uint32_t *)&drvData->info[lightId]->defaultBrightness;
     ret = parser->GetUint32(node, "defaultBrightness", defaultBrightness, 0);
     CHECK_LIGHT_PARSER_RESULT_RETURN_VALUE(ret, "defaultBrightness");
     ret = parser->GetUint32(node, "onTime", &drvData->info[lightId]->onTime, 0);
     CHECK_LIGHT_PARSER_RESULT_RETURN_VALUE(ret, "onTime");
     ret = parser->GetUint32(node, "offTime", &drvData->info[lightId]->offTime, 0);
     CHECK_LIGHT_PARSER_RESULT_RETURN_VALUE(ret, "offTime");


     drvData->info[lightId]->lightBrightness = 0;
     drvData->info[lightId]->lightState = LIGHT_STATE_STOP;


     return HDF_SUCCESS;
 }
    • 分配资源，解析灯HCS配置信息实现如下：
     /* 分配资源，解析灯HCS配置 */
 static int32_t ParseLightInfo(const struct DeviceResourceNode *node, const struct DeviceResourceIface *parser)
 {
     int32_t ret;
     uint32_t i;
     uint32_t temp;
     struct LightDriverData *drvData = NULL;


     drvData = GetLightDrvData();
     CHECK_LIGHT_NULL_PTR_RETURN_VALUE(drvData, HDF_ERR_INVALID_PARAM);
     CHECK_LIGHT_NULL_PTR_RETURN_VALUE(node, HDF_ERR_INVALID_PARAM);
     CHECK_LIGHT_NULL_PTR_RETURN_VALUE(parser, HDF_ERR_INVALID_PARAM);
 	 /* 从HCS配置获取支持的灯类型个数 */
     drvData->lightNum = (uint32_t)parser->GetElemNum(node, "lightId");
     if (drvData->lightNum > LIGHT_ID_NUM) {
         HDF_LOGE("%s: lightNum cross the border", __func__);
         return HDF_FAILURE;
     }


     ret = memset_s(drvData->info, sizeof(drvData->info[LIGHT_ID_NONE]) * LIGHT_ID_BUTT, 0,
         sizeof(drvData->info[LIGHT_ID_NONE]) * LIGHT_ID_BUTT);
     CHECK_LIGHT_PARSER_RESULT_RETURN_VALUE(ret, "memset_s");


     for (i = 0; i < drvData->lightNum; ++i) {
         /* 获取灯的类型 */
         ret = parser->GetUint32ArrayElem(node, "lightId", i, &temp, 0);
         CHECK_LIGHT_PARSER_RESULT_RETURN_VALUE(ret, "lightId");


         if (temp >= LIGHT_ID_BUTT) {
             HDF_LOGE("%s: light id invalid para", __func__);
             return HDF_FAILURE;
         }


         ret = GetLightBaseConfigData(node, parser, temp);
         if (ret != HDF_SUCCESS) {
             HDF_LOGE("%s: get light base config fail", __func__);
             return HDF_FAILURE;
         }
     }


     return HDF_SUCCESS;
 }

    • 灯驱动的内部接口完成了灯类型获取、闪烁模式设置和停止的接口开发，并支持根据闪烁模式创建和销毁定时器。

      • GetAllLightInfo接口实现如下：
       /* Light驱动服务调用GetAllLightInfo接口获取灯类型信息 */
   static int32_t GetAllLightInfo(struct HdfSBuf *data, struct HdfSBuf *reply)
   {
       (void)data;
       uint32_t i;
       struct LightInfo lightInfo;
       struct LightDriverData *drvData = NULL;


       drvData = GetLightDrvData();
       CHECK_LIGHT_NULL_PTR_RETURN_VALUE(drvData, HDF_ERR_INVALID_PARAM);
       CHECK_LIGHT_NULL_PTR_RETURN_VALUE(reply, HDF_ERR_INVALID_PARAM);


       if (!HdfSbufWriteUint32(reply, drvData->lightNum)) {
           HDF_LOGE("%s: write sbuf failed", __func__);
           return HDF_FAILURE;
       }


       for (i = 0; i < LIGHT_ID_BUTT; ++i) {
           if (drvData->info[i] == NULL) {
               continue;
           }
           lightInfo.lightId = i;


           if (!HdfSbufWriteUint32(reply, lightInfo.lightId)) {
               HDF_LOGE("%s: write lightId failed", __func__);
               return HDF_FAILURE;
           }


           if (strcpy_s(lightInfo.lightName, NAME_MAX_LEN, drvData->info[i]->lightInfo.lightName) != EOK) {
               HDF_LOGE("%s:copy lightName failed!", __func__);
               return HDF_FAILURE;
           }


           if (!HdfSbufWriteString(reply, (const char *)lightInfo.lightName)) {
               HDF_LOGE("%s: write lightName failed", __func__);
               return HDF_FAILURE;
           }


           lightInfo.lightNumber = drvData->info[i]->lightInfo.lightNumber;
           if (!HdfSbufWriteUint32(reply, lightInfo.lightNumber)) {
               HDF_LOGE("%s: write lightNumber failed", __func__);
               return HDF_FAILURE;
           }


           lightInfo.lightType = HDF_LIGHT_TYPE_RGB_COLOR;
           if (!HdfSbufWriteUint32(reply, lightInfo.lightType)) {
               HDF_LOGE("%s: write lightType failed", __func__);
               return HDF_FAILURE;
           }
       }


       return HDF_SUCCESS;
   }
    • TurnOnLight接口的实现如下：
       /* 按照指定的类型和用户传入的参数使能灯 */
   static int32_t TurnOnLight(uint32_t lightId, struct HdfSBuf *data, struct HdfSBuf *reply)
   {
       (void)reply;
       uint32_t len;
       struct LightEffect *buf = NULL;
       struct LightDriverData *drvData = NULL;


       drvData = GetLightDrvData();
       CHECK_LIGHT_NULL_PTR_RETURN_VALUE(drvData, HDF_ERR_INVALID_PARAM);


       if (drvData->info[lightId] == NULL) {
           HDF_LOGE("%s: light id info is null", __func__);
           return HDF_FAILURE;
       }


       if (!HdfSbufReadBuffer(data, (const void **)&buf, &len)) {
           HDF_LOGE("%s: light read data failed", __func__);
           return HDF_FAILURE;
       }
   	/* 接收用户传入的亮度值。24-31bit表示扩展位，16-23bit表示红色，8-15bit表示绿色，0-7bit表示蓝色。如果字段不等于0，表示使能相应颜色的灯。
          如果支持亮度设置，则通过0-255设置不同的亮度。 */
       if (buf->lightColor.colorValue.rgbColor.r != 0) {
           drvData->info[lightId]->lightBrightness|= 0X00FF0000;
       }


       if (buf->lightColor.colorValue.rgbColor.g != 0) {
           drvData->info[lightId]->lightBrightness|= 0X0000FF00;
       }


       if (buf->lightColor.colorValue.rgbColor.b != 0) {
           drvData->info[lightId]->lightBrightness|= 0X000000FF;
       }
   	/* 常亮模式 */
       if (buf->flashEffect.flashMode == LIGHT_FLASH_NONE) {
           return UpdateLight(lightId, LIGHT_STATE_START);
       }
   	/* 闪烁模式 */
       if (buf->flashEffect.flashMode == LIGHT_FLASH_BLINK) {
           drvData->info[lightId]->onTime = (buf->flashEffect.onTime < drvData->info[lightId]->onTime) ?
           drvData->info[lightId]->onTime : buf->flashEffect.onTime;
           drvData->info[lightId]->offTime = (buf->flashEffect.offTime < drvData->info[lightId]->offTime) ?
           drvData->info[lightId]->offTime : buf->flashEffect.offTime;
   		/* 创建定时器 */
           if (OsalTimerCreate(&drvData->timer, LIGHT_WAIT_TIME, LightTimerEntry, (uintptr_t)lightId) != HDF_SUCCESS) {
               HDF_LOGE("%s: create light timer fail!", __func__);
               return HDF_FAILURE;
           }
   		/* 启动定时器 */
           if (OsalTimerStartLoop(&drvData->timer) != HDF_SUCCESS) {
               HDF_LOGE("%s: start light timer fail!", __func__);
               return HDF_FAILURE;
           }
       }


       return HDF_SUCCESS;
   }
    • TurnOffLight接口的实现如下：
       /* 按照指定的类型关闭灯 */
   static int32_t TurnOffLight(uint32_t lightId, struct HdfSBuf *data, struct HdfSBuf *reply)
   {
       (void)data;
       (void)reply;
       struct LightDriverData *drvData = NULL;


       drvData = GetLightDrvData();
       CHECK_LIGHT_NULL_PTR_RETURN_VALUE(drvData, HDF_ERR_INVALID_PARAM);


       if (drvData->info[lightId] == NULL) {
           HDF_LOGE("%s: light id info is null", __func__);
           return HDF_FAILURE;
       }


       if (UpdateLight(lightId, LIGHT_STATE_STOP) != HDF_SUCCESS) {
           HDF_LOGE("%s: gpio write failed", __func__);
           return HDF_FAILURE;
       }


       drvData->info[lightId]->lightState = LIGHT_STATE_STOP;
       drvData->info[lightId]->lightBrightness = 0;
   	/* 销毁定时器 */
       if (drvData->timer.realTimer != NULL) {
           if (OsalTimerDelete(&drvData->timer) != HDF_SUCCESS) {
               HDF_LOGE("%s: delete light timer fail!", __func__);
               return HDF_FAILURE;
           }
       }


       return HDF_SUCCESS;
   }

  4. Light Controller中是HDI接口的实现。

    • 代码实现路径：drivers\peripheral\light\hal\src\light_controller.c。

    • GetLightInfo接口的实现如下：

     /* 将Light抽象驱动中写入HdfSBuf中的灯类型信息读取到LightInfo中 */
 static int32_t ReadLightInfo(struct HdfSBuf *reply, struct LightDevice *priv)
 {
     struct LightInfo *pos = NULL;
     const char *name = NULL;


     if (!HdfSbufReadUint32(reply, &priv->lightNum)) {
         HDF_LOGE("%s: sbuf read lightNum failed", __func__);
         return HDF_FAILURE;
     }


     if (priv->lightInfoEntry != NULL) {
         OsalMemFree(priv->lightInfoEntry);
         priv->lightInfoEntry = NULL;
     }


     priv->lightInfoEntry = (struct LightInfo *)OsalMemCalloc(sizeof(*priv->lightInfoEntry) * priv->lightNum);
     if (priv->lightInfoEntry == NULL) {
         HDF_LOGE("%s: malloc fail", __func__);
         return HDF_FAILURE;
     }


     pos = priv->lightInfoEntry;


     for (uint32_t i = 0; i < priv->lightNum; ++i) {
         if (!HdfSbufReadUint32(reply, &pos->lightId)) {
             HDF_LOGE("%{public}s:read lightId failed!", __func__);
             return HDF_FAILURE;
         }


         name = HdfSbufReadString(reply);
         if (strcpy_s(pos->lightName, NAME_MAX_LEN, name) != EOK) {
             HDF_LOGE("%{public}s:copy lightName failed!", __func__);
             return HDF_FAILURE;
         }


         if (!HdfSbufReadUint32(reply, &pos->lightNumber)) {
             HDF_LOGE("%{public}s:read lightNumber failed!", __func__);
             return HDF_FAILURE;
         }


         if (!HdfSbufReadInt32(reply, &pos->lightType)) {
             HDF_LOGE("%{public}s:read lightType failed!", __func__);
             return HDF_FAILURE;
         }
         pos++;
     }


     return HDF_SUCCESS;
 }
 /* GetLightInfo接口实现 */
 static int32_t GetLightInfo(struct LightInfo **lightInfo, uint32_t *count)
 {
     if ((lightInfo == NULL)||(count == NULL)) {
         HDF_LOGE("%s:line:%{public}d pointer is null and return ret", __func__, __LINE__);
         return HDF_FAILURE;
     }


     struct LightDevice *priv = GetLightDevicePriv();


     if (priv->lightNum > 0) {
         *count = priv->lightNum;
         *lightInfo = priv->lightInfoEntry;
         return HDF_SUCCESS;
     }


     (void)OsalMutexLock(&priv->mutex);
     struct HdfSBuf *reply = HdfSbufObtainDefaultSize();
     if (reply == NULL) {
         HDF_LOGE("%s: get sbuf failed", __func__);
         (void)OsalMutexUnlock(&priv->mutex);
         return HDF_FAILURE;
     }


     int32_t ret = SendLightMsg(LIGHT_IO_CMD_GET_INFO_LIST, NULL, reply);
     if (ret != HDF_SUCCESS) {
         HDF_LOGE("%{public}s: Light send cmd failed, ret[%{public}d]", __func__, ret);
         HdfSbufRecycle(reply);
         (void)OsalMutexUnlock(&priv->mutex);
         return ret;
     }


     if (ReadLightInfo(reply, priv) != HDF_SUCCESS) {
         HdfSbufRecycle(reply);
         (void)OsalMutexUnlock(&priv->mutex);
         return HDF_FAILURE;
     }


     HdfSbufRecycle(reply);
     (void)OsalMutexUnlock(&priv->mutex);


     *count = priv->lightNum;
     *lightInfo = priv->lightInfoEntry;


     return HDF_SUCCESS;
 }
    • OnLight接口的实现如下：
     static int32_t OnLight(uint32_t lightId, struct LightEffect *effect)
 {
     int32_t ret;


     if (effect == NULL) {
         HDF_LOGE("%{public}s: effect is NULL", __func__);
         return HDF_FAILURE;
     }


     ret = OnLightValidityJudgment(lightId, effect);
     if (ret != HDF_SUCCESS) {
         HDF_LOGE("%{public}s: effect is false", __func__);
         return ret;
     }


     struct LightDevice *priv = GetLightDevicePriv();
     (void)OsalMutexLock(&priv->mutex);


     struct HdfSBuf *msg = HdfSbufObtainDefaultSize();
     if (msg == NULL) {
         HDF_LOGE("%{public}s: Failed to obtain sBuf size", __func__);
         (void)OsalMutexUnlock(&priv->mutex);
         return HDF_FAILURE;
     }


     if (!HdfSbufWriteInt32(msg, lightId)) {
         HDF_LOGE("%{public}s: Light write id failed", __func__);
         HdfSbufRecycle(msg);
         (void)OsalMutexUnlock(&priv->mutex);
         return HDF_FAILURE;
     }


     if (!HdfSbufWriteInt32(msg, LIGHT_OPS_IO_CMD_ENABLE)) {
         HDF_LOGE("%{public}s: Light write enable failed", __func__);
         HdfSbufRecycle(msg);
         (void)OsalMutexUnlock(&priv->mutex);
         return HDF_FAILURE;
     }


     if (!HdfSbufWriteBuffer(msg, effect, sizeof(*effect))) {
         HDF_LOGE("%{public}s: Light write enable failed", __func__);
         HdfSbufRecycle(msg);
         (void)OsalMutexUnlock(&priv->mutex);
         return HDF_FAILURE;
     }


     ret = SendLightMsg(LIGHT_IO_CMD_OPS, msg, NULL);
     if (ret != HDF_SUCCESS) {
         HDF_LOGE("%{public}s: Light enable failed, ret[%{public}d]", __func__, ret);
     }
     HdfSbufRecycle(msg);
     (void)OsalMutexUnlock(&priv->mutex);


     if (memcpy_s(&g_lightEffect, sizeof(g_lightEffect), effect, sizeof(*effect)) != EOK) {
         HDF_LOGE("%{public}s: Light effect cpy faild", __func__);
         return HDF_FAILURE;
     }


     g_lightState[lightId] = LIGHT_ON;


     return ret;
 }
    • OffLight接口的实现 如下：
     static int32_t OffLight(uint32_t lightId)
 {
     if (lightId >= LIGHT_ID_BUTT) {
         HDF_LOGE("%{public}s: id not supported", __func__);
         return HDF_FAILURE;
     }


     struct LightDevice *priv = GetLightDevicePriv();
     (void)OsalMutexLock(&priv->mutex);


     struct HdfSBuf *msg = HdfSbufObtainDefaultSize();
     if (msg == NULL) {
         HDF_LOGE("%{public}s: Failed to obtain sBuf", __func__);
         (void)OsalMutexUnlock(&priv->mutex);
         return HDF_FAILURE;
     }


     if (!HdfSbufWriteInt32(msg, lightId)) {
         HDF_LOGE("%{public}s: Light write id failed", __func__);
         HdfSbufRecycle(msg);
         (void)OsalMutexUnlock(&priv->mutex);
         return HDF_FAILURE;
     }


     if (!HdfSbufWriteInt32(msg, LIGHT_OPS_IO_CMD_DISABLE)) {
         HDF_LOGE("%{public}s: Light write disable failed", __func__);
         HdfSbufRecycle(msg);
         (void)OsalMutexUnlock(&priv->mutex);
         return HDF_FAILURE;
     }


     int32_t ret = SendLightMsg(LIGHT_IO_CMD_OPS, msg, NULL);
     if (ret != HDF_SUCCESS) {
         HDF_LOGE("%{public}s: Light disable failed, ret[%{public}d]", __func__, ret);
     }
     HdfSbufRecycle(msg);
     (void)OsalMutexUnlock(&priv->mutex);


     g_lightState[lightId] = LIGHT_OFF;


     return ret;
 }
    • OnMultiLights接口的实现如下：
     static int32_t OnMultiLights(uint32_t lightId, const struct LightColor *colors, const uint32_t count)
 {
     int32_t ret;
     struct HdfSBuf *sbuf = NULL;


     ret = OnMultiLightsValidityJudgment(lightId, colors, count);
     if (ret != HDF_SUCCESS) {
         return ret;
     }


     struct LightDevice *priv = GetLightDevicePriv();
     (void)OsalMutexLock(&priv->mutex);
     sbuf = HdfSbufObtain(sizeof(struct LightColor) * count);
     if (sbuf == NULL) {
         return HDF_DEV_ERR_NO_MEMORY;
     }


     if (!HdfSbufWriteInt32(sbuf, lightId)) {
         ret = HDF_FAILURE;
         goto EXIT;
     }


     if (!HdfSbufWriteInt32(sbuf, LIGHT_OPS_IO_CMD_ENABLE_MULTI_LIGHTS)) {
         ret = HDF_FAILURE;
         goto EXIT;
     }


     if (!HdfSbufWriteBuffer(sbuf, colors, sizeof(*colors))) {
         ret = HDF_FAILURE;
         goto EXIT;
     }


     if (!HdfSbufWriteInt32(sbuf, count)) {
         ret = HDF_FAILURE;
         goto EXIT;
     }


     ret = SendLightMsg(LIGHT_IO_CMD_OPS, sbuf, NULL);
     if (ret != HDF_SUCCESS) {
     }
 	return ret;


 EXIT:
     HdfSbufRecycle(sbuf);
     (void)OsalMutexUnlock(&priv->mutex);
 }

调测验证

驱动开发完成后，在灯单元测试里面开发自测试用例，验证驱动基本功能。测试环境采用开发者自测试平台。

  • 参考测试代码如下：
  #include <cmath>
  #include <cstdio>
  #include <gtest/gtest.h>
  #include <securec.h>
  #include "hdf_base.h"
  #include "osal_time.h"
  #include "osal_mem.h"
  #include "light_if.h"
  #include "light_type.h"
  
  using namespace testing::ext;
  const struct LightInterface *g_lightDev = nullptr;
  static struct LightInfo *g_lightInfo = nullptr;
  static uint32_t g_count = 0;
  /* 用例执行前，初始化Light接口实例。 */
  class HdfLightTest : public testing::Test {
  public:
      static void SetUpTestCase();
      static void TearDownTestCase();
      void SetUp();
      void TearDown();
  };
  
  void HdfLightTest::SetUpTestCase()
  {
      g_lightDev = NewLightInterfaceInstance();
      if (g_lightDev == nullptr) {
          printf("test light get Module instance fail\n\r");
      }
      int32_t ret = g_lightDev->GetLightInfo(&g_lightInfo, &g_count);
      if (ret == -1) {
          printf("get light informations fail\n\r");
      }
  }
  
  /* 用例执行后，释放用例资源。 */
  void HdfLightTest::TearDownTestCase()
  {
      if(g_lightDev != nullptr){
          FreeLightInterfaceInstance();
          g_lightDev = nullptr;
      }
  }
  
  void HdfLightTest::SetUp()
  {
  }
  
  void HdfLightTest::TearDown()
  {
  }
  
  /* 获取测试灯类型 */
  HWTEST_F(HdfLightTest, GetLightList001, TestSize.Level1)
  {
      struct LightInfo *info = nullptr;
  
      if (g_lightInfo == nullptr) {
          EXPECT_NE(nullptr, g_lightInfo);
          return;
      }
  
      printf("get light list num[%u]\n\r", g_count);
      info = g_lightInfo;
  
      for (uint32_t i = 0; i < g_count; ++i) {
          printf("get lightId[%u]\n\r", info->lightId);
          EXPECT_GE(info->lightId, 0);
          EXPECT_LE(info->lightId, 4);
          info++;
      }
  }
  
  /* 测试灯常亮模式 */
  HWTEST_F(HdfLightTest, EnableLight001, TestSize.Level1)
  {
      uint32_t i;
      struct LightEffect effect;
      effect.flashEffect.flashMode = 0;
      effect.flashEffect.onTime = 0;
      effect.flashEffect.offTime = 0;
  
      for (i = 0; i < g_count; ++i) {
          effect.lightColor.colorValue.rgbColor.r = 255;
          effect.lightColor.colorValue.rgbColor.g = 0;
          effect.lightColor.colorValue.rgbColor.b = 0;
          int32_t ret = g_lightDev->TurnOnLight(g_lightInfo[i].lightId, &effect);
          EXPECT_EQ(0, ret);
  
     OsalSleep(2);
  
     ret = g_lightDev->TurnOffLight(g_lightInfo[i].lightId);
          EXPECT_EQ(0, ret);
  
          effect.lightColor.colorValue.rgbColor.r = 0;
          effect.lightColor.colorValue.rgbColor.g = 255;
          effect.lightColor.colorValue.rgbColor.b = 0;
          ret = g_lightDev->TurnOnLight(g_lightInfo[i].lightId, &effect);
          EXPECT_EQ(0, ret);
  
          OsalSleep(2);
  
          ret = g_lightDev->TurnOffLight(g_lightInfo[i].lightId);
          EXPECT_EQ(0, ret);
      }
  }
  • 编译文件BUILD.gn参考代码如下：
  import("//build/test.gni")
  import("//drivers/hdf_core/adapter/uhdf2/uhdf.gni")
  
  module_output_path = "drivers_peripheral_light/light"
  ohos_unittest("light_test") {
    module_out_path = module_output_path
    sources = [ "light_test.cpp" ]
    include_dirs = [
      "//drivers/peripheral/light/interfaces/include",
    ]
    deps = [ "//drivers/peripheral/light/hal:hdi_light" ]
  
    external_deps = [
      "c_utils:utils",
      "hdf_core:libhdf_utils",
   	"hiviewdfx_hilog_native:libhilog",
    ]
  
    cflags = [
      "-Wall",
      "-Wextra",
      "-Werror",
      "-Wno-format",
      "-Wno-format-extra-args",
    ]
  
    install_enable = true
    install_images = [ "vendor" ]
    module_install_dir = "bin"
    part_name = "unionman_products"
  }

你可能感兴趣的鸿蒙文章

harmony 鸿蒙驱动使用指南

harmony 鸿蒙HDF驱动开发流程

harmony 鸿蒙概述

harmony 鸿蒙Audio

harmony 鸿蒙Camera

harmony 鸿蒙Codec

harmony 鸿蒙WLAN

harmony 鸿蒙Face_auth

harmony 鸿蒙Fingerprint_auth

harmony 鸿蒙LCD

0  赞
  • 所属分类： 后端技术
  • 本文标签： 软件 鸿蒙
  • 版权声明： 原创文章如转载，请注明本文链接: https://m.seaxiang.com/blog/20fcdf6f7b40442485eb9805e98f689f
热门推荐
标签云
Linux Java Spring Spring Boot docker 大数据 前端 生活 maven golang 软件 spring cloud fintech mac vscode 其他 区块链 以太坊 V神 开发者 技术 股票 git greenplum 分布式事务 chrome mysql flink kafka 设计模式 原理 鸿蒙 seo
最新文章
本文目录