untitled1.c

msp430f449功能模块的程序

//用8MHZ晶体作时钟源实现秒闪
#include<msp430x44x.h>
int data;
void main(void)
{
WDTCTL=WDTPW+WDTHOLD;//停止看门狗
FLL_CTL1 &=~XT2OFF; // Turn on XT2 开启8M晶体XT2OFF
FLL_CTL1 =SELS;// Select SMCLK source as XT2CLK 选择子系统时钟
TACTL=TASSEL1+TACLR+MC0+ID_3;//设置定时器
CCTL0=CCIE;
CCR0=10000;
P3DIR|=BIT7;
_EINT();
while(1);
}
#pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A(void)
{
data=data++;
  if( data==50 )
  {
     data=0;
     P3OUT ^= BIT7;//产生闪烁
  
  }   
}