[ZigBee] 16、Zigbee协议栈应用(二)——基于OSAL的无线控制LED闪烁分析(下)

时间:2022-02-19 18:02:39

说在前面:上一篇介绍了无线LED闪烁实现的OSAL部分,本篇介绍如何实现无线数据收发及数据处理:

上一篇是用SI跟着流程查看源码,我个人认为以架构的思维去了解代码能让人更清晰

[ZigBee] 16、Zigbee协议栈应用(二)——基于OSAL的无线控制LED闪烁分析(下)

::ZMain.c程序入口文件

这里chipcon_cstartup.s51是汇编的启动文件,ZMain.c相当于main文件,里面有main函数:

 int main( void )
{
osal_int_disable( INTS_ALL );// Turn off interrupts 关中断
HAL_BOARD_INIT();// Initialization for board related stuff such as LEDs
zmain_vdd_check();// Make sure supply voltage is high enough to run 检查芯片是否上电正常
InitBoard( OB_COLD );// Initialize board I/O 初始化I/O,LED,Timer等
HalDriverInit();// Initialze HAL drivers 初始化硬件抽象层驱动模块
osal_nv_init( NULL );// Initialize NV System 初始化flash存储器
znpTestRF();// Initialize and check the ZNP RF Test Mode NV items.
ZMacInit();// Initialize the MAC 初始化MAC层
zmain_ext_addr();// Determine the extended address 确定IEEE64位地址 #if defined ZCL_KEY_ESTABLISH
zmain_cert_init();// Initialize the Certicom certificate information.
#endif zgInit();// Initialize basic NV items 初始化非易失变量 #ifndef NONWK
afInit();// Since the AF isn't a task, call it's initialization routine
#endif 23 osal_init_system();// Initialize the operating system 初始化OS(重点介绍1)
osal_int_enable( INTS_ALL );// Allow interrupts 使能中断
InitBoard( OB_READY );// Final board initialization 最终板载初始化
zmain_dev_info();// Display information about this device 显示设备信息(这里有LCD屏幕) #ifdef LCD_SUPPORTED/* Display the device info on the LCD 将信息显示在LCD上*/
zmain_lcd_init();
#endif #ifdef WDT_IN_PM1
WatchDogEnable( WDTIMX );/* If WDT is used, this is a good place to enable it. */
#endif 36 osal_start_znp(); // No Return from here 执行操作系统(重点介绍2) return ; // Shouldn't get here.
} // main()

main主要是初始化,然后启动OS,进入大循环,根据任务优先级处理相应任务。

::OSAL_SampleApp.c任务数组及任务初始化文件

上篇讲到main函数核心有:

[ZigBee] 16、Zigbee协议栈应用(二)——基于OSAL的无线控制LED闪烁分析(下)

[ZigBee] 16、Zigbee协议栈应用(二)——基于OSAL的无线控制LED闪烁分析(下)

初始化最核心的是OSAL任务初始化:(这里的tasksArr是所有任务的索引,后文还会介绍)

 /*********************************************************************
* GLOBAL VARIABLES
*/ // The order in this table must be identical to the task initialization calls below in osalInitTask.
const pTaskEventHandlerFn tasksArr[] =
{
macEventLoop,
nwk_event_loop,
Hal_ProcessEvent,
#if defined( MT_TASK )
MT_ProcessEvent,
#endif
APS_event_loop,
#if defined ( ZIGBEE_FRAGMENTATION )
APSF_ProcessEvent,
#endif
ZDApp_event_loop,
#if defined ( ZIGBEE_FREQ_AGILITY ) || defined ( ZIGBEE_PANID_CONFLICT )
ZDNwkMgr_event_loop,
#endif
22 SampleApp_ProcessEvent
}; const uint8 tasksCnt = sizeof( tasksArr ) / sizeof( tasksArr[] );
uint16 *tasksEvents; /*********************************************************************
* FUNCTIONS
*********************************************************************/ /*********************************************************************
* @fn osalInitTasks
*
* @brief This function invokes the initialization function for each task.
*
* @param void
*
* @return none
*/
void osalInitTasks( void )
{
uint8 taskID = ; // 分配内存,返回指向缓冲区的指针
tasksEvents = (uint16 *)osal_mem_alloc( sizeof( uint16 ) * tasksCnt);
// 设置所分配的内存空间单元值为0
osal_memset( tasksEvents, , (sizeof( uint16 ) * tasksCnt)); // 任务优先级由高向低依次排列,高优先级对应taskID 的值反而小
macTaskInit( taskID++ ); //macTaskInit(0) ,用户不需考虑
nwk_init( taskID++ ); //nwk_init(1),用户不需考虑
Hal_Init( taskID++ ); //Hal_Init(2) ,用户需考虑
#if defined( MT_TASK )
MT_TaskInit( taskID++ );
#endif
APS_Init( taskID++ ); //APS_Init(3) ,用户不需考虑
#if defined ( ZIGBEE_FRAGMENTATION )
APSF_Init( taskID++ );
#endif
ZDApp_Init( taskID++ ); //ZDApp_Init(4) ,用户需考虑
#if defined ( ZIGBEE_FREQ_AGILITY ) || defined ( ZIGBEE_PANID_CONFLICT )
ZDNwkMgr_Init( taskID++ );
#endif
//用户创建的任务
66 SampleApp_Init( taskID ); // SampleApp_Init _Init(5) ,用户需考虑
}

::SampApp.c文件APP任务实现文件

承接上面66行,SampleApp_Init( uint8 task_id )负责初始化本工程定制化任务无线LED闪烁相关的初始化工作:

 void SampleApp_Init( uint8 task_id )
{
SampleApp_TaskID = task_id; //osal分配的任务ID随着用户添加任务的增多而改变
SampleApp_NwkState = DEV_INIT;//设备状态设定为ZDO层中定义的初始化状态
SampleApp_TransID = ; //消息发送ID(多消息时有顺序之分) // Device hardware initialization can be added here or in main() (Zmain.c).
// If the hardware is application specific - add it here.
// If the hardware is other parts of the device add it in main(). #if defined ( BUILD_ALL_DEVICES )
// The "Demo" target is setup to have BUILD_ALL_DEVICES and HOLD_AUTO_START
// We are looking at a jumper (defined in SampleAppHw.c) to be jumpered
// together - if they are - we will start up a coordinator. Otherwise,
// the device will start as a router.
if ( readCoordinatorJumper() )
zgDeviceLogicalType = ZG_DEVICETYPE_COORDINATOR;
else
zgDeviceLogicalType = ZG_DEVICETYPE_ROUTER;
#endif // BUILD_ALL_DEVICES //该段的意思是,如果设置了HOLD_AUTO_START宏定义,将会在启动芯片的时候会暂停启动
//流程,只有外部触发以后才会启动芯片。其实就是需要一个按钮触发它的启动流程。
#if defined ( HOLD_AUTO_START )
// HOLD_AUTO_START is a compile option that will surpress ZDApp
// from starting the device and wait for the application to
// start the device.
ZDOInitDevice();
#endif // Setup for the periodic message's destination address 设置发送数据的方式和目的地址寻址模式
// Broadcast to everyone 发送模式:广播发送
SampleApp_Periodic_DstAddr.addrMode = (afAddrMode_t)AddrBroadcast;//广播
SampleApp_Periodic_DstAddr.endPoint = SAMPLEAPP_ENDPOINT; //指定端点号
SampleApp_Periodic_DstAddr.addr.shortAddr = 0xFFFF;//指定目的网络地址为广播地址 // Setup for the flash command's destination address - Group 1 组播发送
SampleApp_Flash_DstAddr.addrMode = (afAddrMode_t)afAddrGroup; //组寻址
SampleApp_Flash_DstAddr.endPoint = SAMPLEAPP_ENDPOINT; //指定端点号
SampleApp_Flash_DstAddr.addr.shortAddr = SAMPLEAPP_FLASH_GROUP;//组号0x0001 // Fill out the endpoint description. 定义本设备用来通信的APS层端点描述符
SampleApp_epDesc.endPoint = SAMPLEAPP_ENDPOINT; //指定端点号
SampleApp_epDesc.task_id = &SampleApp_TaskID; //SampleApp 描述符的任务ID
SampleApp_epDesc.simpleDesc
= (SimpleDescriptionFormat_t *)&SampleApp_SimpleDesc;//SampleApp简单描述符
SampleApp_epDesc.latencyReq = noLatencyReqs; //延时策略 // Register the endpoint description with the AF
afRegister( &SampleApp_epDesc ); //向AF层登记描述符 // Register for all key events - This app will handle all key events
RegisterForKeys( SampleApp_TaskID ); // 登记所有的按键事件 // By default, all devices start out in Group 1
SampleApp_Group.ID = 0x0001;//组号
osal_memcpy( SampleApp_Group.name, "Group 1", );//设定组名
aps_AddGroup( SAMPLEAPP_ENDPOINT, &SampleApp_Group );//把该组登记添加到APS中 #if defined ( LCD_SUPPORTED )
HalLcdWriteString( "SampleApp", HAL_LCD_LINE_1 ); //如果支持LCD,显示提示信息
#endif
}

SampleApp_Init( uint8 task_id )

上篇讲过OS启动后进入大循环,扫描当前优先级最高的任务执行!

[ZigBee] 16、Zigbee协议栈应用(二)——基于OSAL的无线控制LED闪烁分析(下)

其中若osal_run_task执行了本工程定制化任务的消息,通过调用tasksArr[idx](上面 OSAL_SampleApp.c中讲的任务数组就相当于调用了SampleApp_ProcessEvent函数,将消息传送给任务处理函数:

 //用户应用任务的事件处理函数
uint16 SampleApp_ProcessEvent( uint8 task_id, uint16 events )
{
afIncomingMSGPacket_t *MSGpkt;
(void)task_id; // Intentionally unreferenced parameter if ( events & SYS_EVENT_MSG ) //接收系统消息再进行判断
{
//接收属于本应用任务SampleApp的消息,以SampleApp_TaskID标记
MSGpkt = (afIncomingMSGPacket_t *)osal_msg_receive( SampleApp_TaskID );
while ( MSGpkt )
{
switch ( MSGpkt->hdr.event )
{
// Received when a key is pressed
16 case KEY_CHANGE://按键事件
SampleApp_HandleKeys( ((keyChange_t *)MSGpkt)->state, ((keyChange_t *)MSGpkt)->keys );
break; // Received when a messages is received (OTA) for this endpoint
21 case AF_INCOMING_MSG_CMD://接收数据事件,调用函数AF_DataRequest()接收数据
SampleApp_MessageMSGCB( MSGpkt );//调用回调函数对收到的数据进行处理(1、数据发送函数)
break; // Received whenever the device changes state in the network
26 case ZDO_STATE_CHANGE:
//只要网络状态发生改变,就通过ZDO_STATE_CHANGE事件通知所有的任务。
//同时完成对协调器,路由器,终端的设置
SampleApp_NwkState = (devStates_t)(MSGpkt->hdr.status);
//if ( (SampleApp_NwkState == DEV_ZB_COORD)//实验中协调器只接收数据所以取消发送事件
if ( (SampleApp_NwkState == DEV_ROUTER) || (SampleApp_NwkState == DEV_END_DEVICE) )
{
// Start sending the periodic message in a regular interval.
//这个定时器只是为发送周期信息开启的,设备启动初始化后从这里开始
//触发第一个周期信息的发送,然后周而复始下去
osal_start_timerEx( SampleApp_TaskID,
SAMPLEAPP_SEND_PERIODIC_MSG_EVT,
SAMPLEAPP_SEND_PERIODIC_MSG_TIMEOUT );
}
else
{
// Device is no longer in the network
}
break; default:
break;
} // Release the memory 事件处理完了,释放消息占用的内存
osal_msg_deallocate( (uint8 *)MSGpkt ); // Next - if one is available 指针指向下一个放在缓冲区的待处理的事件,
//返回while ( MSGpkt )重新处理事件,直到缓冲区没有等待处理事件为止
MSGpkt = (afIncomingMSGPacket_t *)osal_msg_receive( SampleApp_TaskID );
} // return unprocessed events 返回未处理的事件
return (events ^ SYS_EVENT_MSG);
} // Send a message out - This event is generated by a timer
// (setup in SampleApp_Init()).
if ( events & SAMPLEAPP_SEND_PERIODIC_MSG_EVT )
{
// Send the periodic message 处理周期性事件,
//利用SampleApp_SendPeriodicMessage()处理完当前的周期性事件,然后启动定时器
//开启下一个周期性事情,这样一种循环下去,也即是上面说的周期性事件了,
//可以做为传感器定时采集、上传任务
SampleApp_SendPeriodicMessage();

// Setup to send message again in normal period (+ a little jitter)
osal_start_timerEx( SampleApp_TaskID, SAMPLEAPP_SEND_PERIODIC_MSG_EVT,
(SAMPLEAPP_SEND_PERIODIC_MSG_TIMEOUT + (osal_rand() & 0x00FF)) ); // return unprocessed events 返回未处理的事件
return (events ^ SAMPLEAPP_SEND_PERIODIC_MSG_EVT);
} // Discard unknown events
return ;
}

接收函数:

 //接收数据,参数为接收到的数据
void SampleApp_MessageMSGCB( afIncomingMSGPacket_t *pkt )
{
uint16 flashTime;
byte buf[]; switch ( pkt->clusterId ) //判断簇ID
{
case SAMPLEAPP_PERIODIC_CLUSTERID: //收到广播数据
osal_memset(buf, , );
osal_memcpy(buf, pkt->cmd.Data, ); //复制数据到缓冲区中 if(buf[] == 'D' && buf[] == '') //判断收到的数据是否为"D1"
{
HalLedBlink(HAL_LED_1, , , );//如果是则Led1间隔500ms闪烁
#if defined(ZDO_COORDINATOR) //协调器收到"D1"后,返回"D1"给终端,让终端Led1也闪烁
SampleApp_SendPeriodicMessage();
#endif
}
else
{
HalLedSet(HAL_LED_1, HAL_LED_MODE_ON);
}
break; case SAMPLEAPP_FLASH_CLUSTERID: //收到组播数据
flashTime = BUILD_UINT16(pkt->cmd.Data[], pkt->cmd.Data[] );
HalLedBlink( HAL_LED_4, , , (flashTime / ) );
break;
}
}

发送函数:

 //分析发送周期信息
void SampleApp_SendPeriodicMessage( void )
{
byte SendData[] = "D1"; // 调用AF_DataRequest将数据无线广播出去
if( AF_DataRequest( &SampleApp_Periodic_DstAddr,//发送目的地址+端点地址和传送模式
8 &SampleApp_epDesc,//源(答复或确认)终端的描述(比如操作系统中任务ID等)源EP
9 SAMPLEAPP_PERIODIC_CLUSTERID, //被Profile指定的有效的集群号
10 2, // 发送数据长度
11 SendData,// 发送数据缓冲区
12 &SampleApp_TransID, // 任务ID号
13 AF_DISCV_ROUTE, // 有效位掩码的发送选项
14 AF_DEFAULT_RADIUS ) == afStatus_SUCCESS ) //传送跳数,通常设置为AF_DEFAULT_RADIUS

{
}
else
{
HalLedSet(HAL_LED_1, HAL_LED_MODE_ON);
// Error occurred in request to send.
}
}

Zigbee系列文章:

[ZigBee] 1、 ZigBee简介

[ZigBee] 2、 ZigBee开发环境搭建

[ZigBee] 3、ZigBee基础实验——GPIO输出控制实验-控制Led亮灭

[ZigBee] 4、ZigBee基础实验——中断

[ZigBee] 5、ZigBee基础实验——图文与代码详解定时器1(16位定时器)(长文)

[ZigBee] 6、ZigBee基础实验——定时器3和定时器4(8 位定时器)

[ZigBee] 7、ZigBee之UART剖析(ONLY串口发送)

[ZigBee] 8、ZigBee之UART剖析·二(串口收发)

[ZigBee] 9、ZigBee之AD剖析——AD采集CC2530温度串口显示

[ZigBee] 10、ZigBee之睡眠定时器

[ZigBee] 11、ZigBee之睡眠定时器二

[ZigBee] 12、ZigBee之看门狗定时器——饿了就咬人的GOOD DOG

[ZigBee] 13、ZigBee基础阶段性回顾与加深理解——用定时器1产生PWM来控制LED亮度(七色灯)

[ZigBee] 14、Zigbee无线通信前奏——BasicRF 简单无线点对点传输协议

[ZigBee] 15、Zigbee协议栈应用(一)——Zigbee协议栈介绍及简单例子(长文,OSAL及Zigbee入门知识)

PS:如果您觉得还不错,点个赞,让更多人受益~

@beautifulzzzz 2016-08-01 continue~  
e-mail:beautifulzzzz@qq.com 
sina:http://weibo.com/beautifulzzzz?is_all=1