通過計算設置周期。

#include

void main( void )

{

// Stop watchdog timer to prevent time out reset

WDTCTL = WDTPW + WDTHOLD; //WDTCTL = 0X5A80;關狗

CCTL0 = CCIE; //使能CCR0中斷

CCR0 = 4095; //設置周期為0.5s

TACTL = TASSEL_2 + ID_2 + MC_1; //時鐘源的選擇，分頻，模式

P2DIR = 0XFF;

// P2OUT = 0XFF;

_EINT();

LPM0;

}

#pragma vector = TIMERA0_VECTOR

__interrupt void Timer_A()

{

P2OUT = ~P2OUT;

// CCR0 += 50000;

}