（转）ZCL调用机制

1万 · 2018-7-24 09:19

1.如果有一个ZCL命令发出，如zclGeneral_SendOnOff_CmdToggle(AT_ZCL_ENDPOINT,&dstAddr,0,1)，此函数实际上是zcl_SendCommand函数的宏定义，此函数调用AF_DataRequest函数将信息通过无线发出去。2.在接收端，必须先要对端点描述符和回调函数进行注册，在这里讲一下在初始化函数里调用的一个函数zclGeneral_RegisterCmdCallbacks( AT_ZCL_ENDPOINT, &AT_ZCL_GEN_CmdCallbacks )，即回调注册函数，进入这个函数，有如下代码：
if ( zclGenPluginRegisted == FALSE )
  {
zcl_registerPlugin( ZCL_CLUSTER_ID_GEN_BASIC,
                     ZCL_CLUSTER_ID_GEN_MULTISTATE_VALUE_BASIC,
                     zclGeneral_HdlIncoming );
......
就是如果没有注册回调函数，则对其进行注册。只要是相应簇注册了回调函数，接收到相关命令就会处理。
3.当AF层收到数据包时，会进入zcl_event_loop处理函数，注意里面这段代码:
if ( *msgPtr == AF_INCOMING_MSG_CMD )
   {
      rawAFMsg = (afIncomingMSGPacket_t *)msgPtr;
      zclProcessMessageMSG( rawAFMsg );
      rawAFMsg = NULL;
   }

如果收到AF层的消息，则调用zclProcessMessageMSG( rawAFMsg )，那这个函数又干了什么呢？不妨先看看函数体，
epDesc = afFindEndPointDesc( pkt->endPoint );首先是获取相应端点信息，
......
  pInPlugin = zclFindPlugin( pkt->clusterId, epDesc->simpleDesc->AppProfId );接着根据簇寻找簇范围内的对应回调函数，

......
else  // Not a foundation type message, so it must be specific to the cluster ID.
  {
if ( pInPlugin && pInPlugin->pfnIncomingHdlr )
{
   // The return value of the plugin function will be
   //  ZSuccess - Supported and need default response
   //  ZFailure - Unsupported
   //  ZCL_STATUS_CMD_HAS_RSP - Supported and do not need default rsp
   //  ZCL_STATUS_INVALID_FIELD - Supported, but the incoming msg is wrong formatted
   //  ZCL_STATUS_INVALID_VALUE - Supported, but the request not achievable by the h/w
   //  ZCL_STATUS_SOFTWARE_FAILURE - Supported but ZStack memory allocation fails
   status = pInPlugin->pfnIncomingHdlr( &inMsg );
   if ( status == ZCL_STATUS_CMD_HAS_RSP || ( interPanMsg && status == ZSuccess ) )
   {
      return; // We're done
   }
}

这里就是调用函数zclGeneral_HdlIncoming，进入
if ( zcl_ClusterCmd( pInMsg->hdr.fc.type ) )
  {
// Is this a manufacturer specific command?
if ( pInMsg->hdr.fc.manuSpecific == 0 )
{
   stat = zclGeneral_HdlInSpecificCommands( pInMsg );
}
else
{
   // We don't support any manufacturer specific command.
   stat = ZFailure;
}
  }
这里调用到了zclGeneral_HdlInSpecificCommands( pInMsg )，进入
static ZStatus_t zclGeneral_HdlInSpecificCommands( zclIncoming_t *pInMsg )
{
  ZStatus_t stat;
  zclGeneral_AppCallbacks_t *pCBs;

  // make sure endpoint exists
  pCBs = zclGeneral_FindCallbacks( pInMsg->msg->endPoint );
  if ( pCBs == NULL )
return ( ZFailure );

  switch ( pInMsg->msg->clusterId )
  {
#ifdef ZCL_BASIC
case ZCL_CLUSTER_ID_GEN_BASIC:
   stat = zclGeneral_ProcessInBasic( pInMsg, pCBs );
   break;
#endif // ZCL_BASIC

#ifdef ZCL_IDENTIFY
case ZCL_CLUSTER_ID_GEN_IDENTIFY:
   stat = zclGeneral_ProcessInIdentity( pInMsg, pCBs );
   break;
#endif // ZCL_IDENTIFY

#ifdef ZCL_GROUPS
case ZCL_CLUSTER_ID_GEN_GROUPS:
   if ( zcl_ServerCmd( pInMsg->hdr.fc.direction ) )
      stat = zclGeneral_ProcessInGroupsServer( pInMsg );
   else
      stat = zclGeneral_ProcessInGroupsClient( pInMsg, pCBs );
   break;
#endif // ZCL_GROUPS

#ifdef ZCL_SCENES
case ZCL_CLUSTER_ID_GEN_SCENES:
   if ( zcl_ServerCmd( pInMsg->hdr.fc.direction ) )
      stat = zclGeneral_ProcessInScenesServer( pInMsg, pCBs );
   else
      stat = zclGeneral_ProcessInScenesClient( pInMsg, pCBs );
   break;
#endif // ZCL_SCENES

#ifdef ZCL_ON_OFF
case ZCL_CLUSTER_ID_GEN_ON_OFF:
   stat = zclGeneral_ProcessInOnOff( pInMsg, pCBs );
   break;
#endif // ZCL_ON_OFF

#ifdef ZCL_LEVEL_CTRL
case ZCL_CLUSTER_ID_GEN_LEVEL_CONTROL:
   stat = zclGeneral_ProcessInLevelControl( pInMsg, pCBs );
   break;
#endif // ZCL_LEVEL_CTRL

#ifdef ZCL_ALARMS
case ZCL_CLUSTER_ID_GEN_ALARMS:
   if ( zcl_ServerCmd( pInMsg->hdr.fc.direction ) )
      stat = zclGeneral_ProcessInAlarmsServer( pInMsg, pCBs );
   else
      stat = zclGeneral_ProcessInAlarmsClient( pInMsg, pCBs );
   break;
#endif // ZCL_ALARMS

#ifdef ZCL_LOCATION
case ZCL_CLUSTER_ID_GEN_LOCATION:
   if ( zcl_ServerCmd( pInMsg->hdr.fc.direction ) )
      stat = zclGeneral_ProcessInLocationServer( pInMsg, pCBs );
   else
      stat = zclGeneral_ProcessInLocationClient( pInMsg, pCBs );
   break;
#endif // ZCL_LOCATION

case ZCL_CLUSTER_ID_GEN_POWER_CFG:
case ZCL_CLUSTER_ID_GEN_DEVICE_TEMP_CONFIG:
case ZCL_CLUSTER_ID_GEN_ON_OFF_SWITCH_CONFIG:
case ZCL_CLUSTER_ID_GEN_TIME:
default:
   stat = ZFailure;
   break;
  }

  return ( stat );
}

到这里，是不是都全明白了，原来所有的簇处理函数都可以在这里完成。