[嵌入式C] MCU

MCU筆記

2017/8/12 更新:

microproccesser bus rate = Oscillator / 2 

int main()

{

  LOCK();   //disable irq

  init_periphery(); //initialize.c 

     ->Step1.Set up elpi mode (clock)

     ->Step2.Setup GPIO 

     ->Step3.Setup lp timer  

     ->Step4.Setup I2C

     ->Step5.

          /* switch to very low power run mode */

            set_vlpr_mode();

            /* switch to very low power stop mode */

            set_vlps_mode();

configure_NVIC(); //initialize.c

     ->Step0.設定&註冊 irq 優先權

init_app_objects(); //initialize.c

     ->Step1. initialize button press dispatcher */

     ->Step2.initialize state object */

  

init_watchdog(); //initialize.c

  UNLOCK();  //enable irq

  while(true)

  {

    set_vlps_mode();

    const sEvent * evt = GetEvent(&_BtnObj.base.EvQueue);

    if(evt != 0) {

      /* dispatch event to btn object */

      SMDispatch((sSM*) &_BtnObj, evt);

    }

    evt = GetEvent(&_StateObj.base.EvQueue);

    if(evt != 0) {

      /* dispatch event to state object */

      SMDispatch((sSM*) &_StateObj, evt);

    }

    /* feed the watchdog */

    COP_DRV_Refresh(0);

  }

  return 0;

}