集线器控制

按照数据模型代码生成器中的说明生成低级 C 代码。

按照集成终端设备 SDK 中的说明执行以下操作：

1. 设置构建环境

   作为开发主机，在亚马逊 Linux 2023/x86_64 上构建代码。安装必要的编译依赖项：

   dnf install make gcc gcc-c++ cmake

2. 开发硬件回调函数

   在实现硬件回调函数之前，请先了解 API 的工作原理。此示例使用 On/Off 群集和 OnOff 属性来控制设备功能。有关 API 的详细信息，请参阅低级 C 函数 APIs。

   struct DeviceState
   {
     struct iotmiDev_Agent *agent;
     struct iotmiDev_Endpoint *endpointLight;
     /* This simulates the HW state of OnOff */
     bool hwState;   
   };
   
   /* This implementation for OnOff getter just reads
      the state from the DeviceState */
   iotmiDev_DMStatus exampleGetOnOff(bool *value, void *user)
   {
      struct DeviceState *state = (struct DeviceState *)(user);
     *value = state->hwState;
     return iotmiDev_DMStatusOk;
   }

3. 设置端点并挂接硬件回调函数

   实现函数后，创建端点并注册您的回调。完成以下任务：

   1. 创建设备代理

   2. 为要支持的每个集群结构填充回调函数点

   3. 设置终端节点并注册支持的集群

   struct DeviceState
   {
       struct iotmiDev_Agent * agent;
       struct iotmiDev_Endpoint *endpoint1;
   
       /* OnOff cluster states*/
       bool hwState;
   };
   
   
   /* This implementation for OnOff getter just reads
      the state from the DeviceState */
   iotmiDev_DMStatus exampleGetOnOff( bool * value, void * user )
   {
       struct DeviceState * state = ( struct DeviceState * ) ( user );
       *value = state->hwState;
       printf( "%s(): state->hwState: %d\n", __func__, state->hwState );
       return iotmiDev_DMStatusOk;
   }
   
   iotmiDev_DMStatus exampleGetOnTime( uint16_t * value, void * user )
   {
       *value = 0;
       printf( "%s(): OnTime is %u\n", __func__, *value );
       return iotmiDev_DMStatusOk;
   }
   
   iotmiDev_DMStatus exampleGetStartUpOnOff( iotmiDev_OnOff_StartUpOnOffEnum * value, void * user )
   {
       *value = iotmiDev_OnOff_StartUpOnOffEnum_Off;
       printf( "%s(): StartUpOnOff is %d\n", __func__, *value );
       return iotmiDev_DMStatusOk;
   }
   
   void setupOnOff( struct DeviceState *state )
   {
       struct iotmiDev_clusterOnOff clusterOnOff = {
           .getOnOff = exampleGetOnOff,
           .getOnTime = exampleGetOnTime,
           .getStartUpOnOff = exampleGetStartUpOnOff,
       };
       iotmiDev_OnOffRegisterCluster( state->endpoint1,
                                       &clusterOnOff,
                                       ( void * ) state);
   }
   
   
   /* Here is the sample setting up an endpoint 1 with OnOff
      cluster. Note all error handling code is omitted. */
   void setupAgent(struct DeviceState *state)
   {
       struct iotmiDev_Agent_Config config = {
           .thingId = IOTMI_DEVICE_MANAGED_THING_ID,
           .clientId = IOTMI_DEVICE_CLIENT_ID,
       };
       iotmiDev_Agent_InitDefaultConfig(&config);
   
       /* Create a device agent before calling other SDK APIs */
       state->agent = iotmiDev_Agent_new(&config);
       
       /* Create endpoint#1 */
       state->endpoint1 = iotmiDev_Agent_addEndpoint( state->agent,
                                                       1,
                                                       "Data Model Handler Test Device",
                                                       (const char*[]){ "Camera" },
                                                       1 );
       setupOnOff(state);
   }
   

将代码生成的文件移到文件example夹：

cp codegen/out/* example/dm

要构建集线器控件，请运行以下命令：

cd <hub-control-root-folder>

mkdir build

cd build

cmake -DBUILD_EXAMPLE_WITH_MQTT_PROXY=ON -DIOTMI_USE_MANAGED_INTEGRATIONS_DEVICE_LOG=ON ..

cmake -build .

使用集线器上的MQTTProxy组件运行示例，并运行HubOnboarding和MQTTProxy组件。

./examples/iotmi_device_sample_camera/iotmi_device_sample_camera