Cortex-M/EFM322013. 5. 1. 19:30

EFM32 Timer 테스트 - 타이머 인터럽트로 1초 만들기

EFM32 Timer 테스트 - 타이머 인터럽트로 1초 만들기

 


 

EFM32 Timer 초기화 함수


 void InitTimer0(void)

 {

// Enable clock for TIMER0 module

CMU_ClockEnable(cmuClock_TIMER0, true);



//Select TIMER0 parameters

TIMER_Init_TypeDef timerInit =

{

.enable     = true,

.debugRun   = true,

.prescale   = timerPrescale1024,

.clkSel     = timerClkSelHFPerClk,

.fallAction = timerInputActionNone,

.riseAction = timerInputActionNone,

.mode       = timerModeUp,

.dmaClrAct  = false,

.quadModeX4 = false,

.oneShot    = false,

.sync       = false,

};


// Enable overflow interrupt

TIMER_IntEnable(TIMER0, TIMER_IF_OF);


// Enable TIMER0 interrupt vector in NVIC

NVIC_EnableIRQ(TIMER0_IRQn);


// Set TIMER Top value - Top Value / (28MHz / 1024 (prescaler))

// For 1 Seconds Top Value= 27344

TIMER_TopSet(TIMER0, 27344);


/* Configure TIMER */

TIMER_Init(TIMER0, &timerInit);

}





EFM32 타이머 인터럽트 핸들러

void TIMER0_IRQHandler(void)

{

//Clear flag for TIMER0 overflow interrupt

TIMER_IntClear(TIMER0, TIMER_IF_OF);


Led1Toggle();

}


Posted by nexp

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