MSP430F149学习之路——时钟2

代码一：

/**************************
功能：LED每隔1秒闪烁一次
****************************/
#include <msp430x14x.h>
void main()
{
  P6DIR = 0XFF;
  P6OUT = 0X00;
  TACCR0 = 4095;
  TACCTL0 = CCIE;
  TACTL = TASSEL_1 + ID_3 + MC_1;
  
  _EINT();
  LPM3;
}
#pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A(void)
{
  P6OUT ^= 0XFF;
}

 代码二：

#include <msp430x14x.h>

int flag=0,time=0;
void int_clk();    //初始化时钟
void int_timer();  //设置定时器A
void main()
{
  WDTCTL = WDTPW +WDTHOLD;
  P6DIR  = 0XFF;
  P6OUT  = 0XFF;
  int_clk();
  int_timer();
  _EINT();
  
  for(;;)
  {
    while(flag)
    {
      flag=0;
      time++;
      if(time==100)
      {
        P6OUT ^= 0XFF;
        time = 0;
      }
    }
  }
}

void int_clk()
{
  BCSCTL1 &= ~XT2OFF;
  BCSCTL2 |= SELM_1 + SELS;
  do
  {
    IFG1 &= ~OFIFG;
    for(int i=100;i>0;i--)
      _NOP();
  }while((IFG1 & OFIFG)!=0);
  IFG1 &= ~OFIFG;
}

void int_timer()
{
  TACTL |= TASSEL_2 + ID_3 + MC_1;
  TACCTL0 = CCIE;
  TACCR0 = 9999;      //10ms
}
#pragma vector = TIMERA0_VECTOR
__interrupt void Timer_A(void)
{
  flag = 1;
}