ZigBee学习之33—osal_start_system()

1、#1楼主：【原创】ZigBee学习之33osal_start_system()文章发表于：2010-02-12 17:34 osal_start_system(); /运行系统【OSAL.c】/此函数是任务系统的主循环函数，他将轮询所有任务事件然后调用相关的任务处理函数，没有任务时将进入休眠状态。void osal_start_system( void )#if !defined ( ZBIT )/虽然搞不清楚这个ZBIT什么东西，不过应该是没有定义的，如果定义了的话所有函数只会顺序跑下来，跑完这个函数整个系统就结束了，没有意义，这里看到这个无限循环应该就是整个系统的运行方式了 for(;)

2、#endif uint8 idx = 0; Hal_ProcessPoll(); / This replaces MT_SerialPoll() and osal_check_timer()./OSAL调用此函数来推送UART，TIMER。【hal_drivers.c】void Hal_ProcessPoll ()/选取定时器 HalTimerTick();/检查定时器的计数溢出【hal_timer.c】void HalTimerTick (void) if (!halTimerRecordHW_TIMER_1.intEnable) halProcessTimer1 ();/处理TIMER1事

3、件void halProcessTimer1 (void) if (halTimerRecordhalTimerRemap(HAL_TIMER_3).channelMode = HAL_TIMER_CH_MODE_OUTPUT_COMPARE)/处理通道模式为输出比较时的情况 if (T1CTL & T1CTL_CH0IF)/检查通道0中断标志看是否达到设定的中断要求 T1CTL &= (T1CTL_CH0IF);/清除中断标志 halTimerSendCallBack (HAL_TIMER_3, HAL_TIMER_CHANNEL_A, HAL_TIMER_CH_MODE_O

4、UTPUT_COMPARE);/给回调函数发送回应void halTimerSendCallBack (uint8 timerId, uint8 channel, uint8 channelMode) uint8 hwtimerid; hwtimerid = halTimerRemap (timerId); if (halTimerRecordhwtimerid.callBackFunc) (halTimerRecordhwtimerid.callBackFunc) (timerId, channel, channelMode); if (T1CTL & T1CTL_CH1IF) T1

5、CTL &= (T1CTL_CH1IF); halTimerSendCallBack (HAL_TIMER_3, HAL_TIMER_CHANNEL_B, HAL_TIMER_CH_MODE_OUTPUT_COMPARE); if (T1CTL & T1CTL_CH2IF) T1CTL &= (T1CTL_CH2IF); halTimerSendCallBack (HAL_TIMER_3, HAL_TIMER_CHANNEL_C, HAL_TIMER_CH_MODE_OUTPUT_COMPARE); else if (halTimerRecordhalTimerRema

6、p(HAL_TIMER_3).channelMode = HAL_TIMER_CH_MODE_OVERFLOW) if (T1CTL & T1CTL_OVFIF) T1CTL &= (T1CTL_OVFIF); halTimerSendCallBack (HAL_TIMER_3, HAL_TIMER_CHANNEL_SINGLE, HAL_TIMER_CH_MODE_OVERFLOW); if (!halTimerRecordHW_TIMER_3.intEnable) halProcessTimer3 (); if (!halTimerRecordHW_TIMER_4.intE

7、nable) halProcessTimer4 (); /* UART的选取*/#if (defined HAL_UART) && (HAL_UART = TRUE) HalUARTPoll();/【hal_uart.c】typedef struct uint8 *rxBuf; uint8 rxHead; uint8 rxTail; uint8 rxMax; uint8 rxCnt; uint8 rxTick; uint8 rxHigh; uint8 *txBuf;#if HAL_UART_BIG_TX_BUF uint16 txHead; uint16 txTail; uin

8、t16 txMax; uint16 txCnt;#else uint8 txHead; uint8 txTail; uint8 txMax; uint8 txCnt;#endif uint8 txTick; uint8 flag; halUARTCBack_t rxCB; uartCfg_t;/UART数据结构，这个数据结构在文档中没有提到，估计是串口缓存区的配置串口需要掌握的是HalUARTOpen函数和halUARTCfg_t数据结构#endif do if (tasksEventsidx) /轮询检查任务 break; while (+idx < tasksCnt); if (id

9、x < tasksCnt) uint16 events; halIntState_t intState; HAL_ENTER_CRITICAL_SECTION(intState); events = tasksEventsidx; tasksEventsidx = 0; / Clear the Events for this task. HAL_EXIT_CRITICAL_SECTION(intState); events = (tasksArridx)( idx, events );/根据事件的类型执行相关的任务处理函数 HAL_ENTER_CRITICAL_SECTION(intState); tasksEventsidx |= events; / Add back unprocessed events to the current task. HAL_EXIT_CRITICAL_SECTION(intState); #if defined( Power_SAVING ) else / Comp