TI osal蓝牙协议栈回调分析

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TI osal蓝牙协议栈回调分析

《BLE高级实践17 一主三从（12.08更新）》

搜索"Advertising"可以看到peripheralStateNotificationCB函数中有提及：

HalLcdWriteString("Advertising", HAL_LCD_LINE_3);

--------》

包含进simpleBLEPeripheral_PeripheralCBs数组：

// GAP Role Callbacks

static gapRolesCBs_t simpleBLEPeripheral_PeripheralCBs =

{

peripheralStateNotificationCB, //Profile State Change Callbacks

NULL //When a valid RSSI is read from controller (not used by application)

};

-------》

SimpleBLEPeripheral_ProcessEvent函数中进行了注册：

// Start the Device

VOID GAPRole_StartDevice(&simpleBLEPeripheral_PeripheralCBs );

-------》

保存pGapRoles_AppCGs变量：

// Clear all of the Application callbacks

if ( pAppCallbacks )

{

pGapRoles_AppCGs = pAppCallbacks;

}

有两个地方调用了pGapRoles_AppCGs->pfnStateChange，先说GAPRole_ProcessEvent函数中的：

————》

if ( events & START_ADVERTISING_EVT )

{

…………………………………………………….

// Notify the application with the newstate change

if ( pGapRoles_AppCGs &&pGapRoles_AppCGs->pfnStateChange )

{

pGapRoles_AppCGs->pfnStateChange(gapRole_state );

}

………………………………………………………

}

----------》

// Theorder in this table must be identical to the task initialization calls below inosalInitTask.

constpTaskEventHandlerFn tasksArr[] =

{

LL_ProcessEvent, // task 0

Hal_ProcessEvent, // task 1

HCI_ProcessEvent, // task 2

#ifdefined ( OSAL_CBTIMER_NUM_TASKS )

OSAL_CBTIMER_PROCESS_EVENT(osal_CbTimerProcessEvent ), //task 3

#endif

L2CAP_ProcessEvent, // task 4

GAP_ProcessEvent, // task 5

GATT_ProcessEvent, // task 6

SM_ProcessEvent, // task 7

GAPRole_ProcessEvent, //task 8

GAPBondMgr_ProcessEvent, //task 9

GATTServApp_ProcessEvent, // task 10

SimpleBLEPeripheral_ProcessEvent // task 11

};

最后来到tasksArr数组，这是osal回调事件的数组，看看osal事件初始化：

voidosalInitTasks( void )

{

uint8 taskID = 0;

tasksEvents = (uint16 *)osal_mem_alloc(sizeof( uint16 ) * tasksCnt);

osal_memset( tasksEvents, 0, (sizeof( uint16) * tasksCnt));

/* LL Task */

LL_Init( taskID++ );

/* Hal Task */

Hal_Init( taskID++ );

/* HCI Task */

HCI_Init( taskID++ );

#ifdefined ( OSAL_CBTIMER_NUM_TASKS )

/* Callback Timer Tasks */

osal_CbTimerInit( taskID );

taskID += OSAL_CBTIMER_NUM_TASKS;

#endif

/* L2CAP Task */

L2CAP_Init( taskID++ );

/* GAP Task */

GAP_Init( taskID++ );

/* GATT Task */

GATT_Init( taskID++ );

/* SM Task */

SM_Init( taskID++ );

/* Profiles */

GAPRole_Init( taskID++ );

GAPBondMgr_Init( taskID++ );

GATTServApp_Init( taskID++ );

/* Application */

SimpleBLEPeripheral_Init( taskID );

}

这里存在着一一对应的关系，事件的排序按照蓝牙协议栈从低往上排。

下来看gapRole_ProcessGAPMsg函数中的pGapRoles_AppCGs->pfnStateChange：

---------》

staticvoid gapRole_ProcessGAPMsg( gapEventHdr_t *pMsg )

{

………………………………………………..

if ( notify == TRUE )

{

// Notify the application with the newstate change

if ( pGapRoles_AppCGs &&pGapRoles_AppCGs->pfnStateChange )

{

pGapRoles_AppCGs->pfnStateChange(gapRole_state );

}

//这里还处理了蓝牙其他回调事件，比如：GAP_ADV_DATA_UPDATE_DONE_EVENT

——————》

staticvoid gapRole_ProcessOSALMsg( osal_event_hdr_t *pMsg )

{

switch ( pMsg->event )

{

……………………………………………………

case GAP_MSG_EVENT:

gapRole_ProcessGAPMsg( (gapEventHdr_t *)pMsg);

break;

----------------》

uint16GAPRole_ProcessEvent( uint8 task_id, uint16 events )

{

VOID task_id; // OSAL required parameter thatisn't used in this function

if ( events & SYS_EVENT_MSG )

{

uint8 *pMsg;

if ( (pMsg = osal_msg_receive(gapRole_TaskID )) != NULL )

{

gapRole_ProcessOSALMsg( (osal_event_hdr_t*)pMsg );

// Release the OSAL message

VOID osal_msg_deallocate( pMsg );

}

// return unprocessed events

return (events ^ SYS_EVENT_MSG);

}

//这里回到了GAPRole_ProcessEvent函数，蓝牙回调事件基本在GAPRole_ProcessEvent函数中进行的

这里上传本博客使用到的代码：

http://download.csdn.net/detail/chengdong1314/9820872

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