MSP430F249_TimerA定时器

火辣西米秀

MSP430F249_TimerA定时器 [复制链接]

#include "MSP430X24X.h"
int Count;
void main(void)
{
        // Stop watchdog timer to prevent time out reset
        WDTCTL = WDTPW + WDTHOLD;       //关狗
  
        P4DIR = BIT0|BIT1|BIT2|BIT3;    //设置为输出
        P4SEL = 0;
        
        P1IE |= 0x08;                             // P1.3 interrupt enabled
        P1IES |= 0x08;                            // P1.3 Hi/lo edge
        P1IFG &= ~0x08;                           // P1.3 IFG cleared

        //__bis_SR_register(LPM4_bits + GIE);       // Enter LPM4 w/interrupt
        
        CCTL0 = CCIE;                             // CCR0 interrupt enabled
        CCR0 = 10;
        TACTL = TASSEL_2 + MC_2;                  // SMCLK, contmode

        _BIS_SR(LPM0_bits + GIE);                 // Enter LPM0 w/ interrupt
        
        while(1)
        {
              if( 10 < Count )
              {
                  Count = 0;
                  
                  P4OUT ^= 0x0F;              //电平翻转
              }
        }
        
}

// Port 1 interrupt service routine
#pragma vector=PORT1_VECTOR
__interrupt void Port_1(void)
{
    P4OUT ^= 0x0F;              //电平翻转   
    P1IFG &= ~0x08;             // P1.3 IFG cleared,注意清标志位，否则会一直进入中断
}
// Timer A0 interrupt service routine
#pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A (void)
{
    //P4OUT ^= 0x0F;              //电平翻转   
    Count++;
    if( 10 < Count )
    {
         __bic_SR_register_on_exit(LPM0_bits);        // Exit LPM0
    }
}