int main(void)
{
    //WDTCTL = WDTPW | WDTHOLD;
    WDTCTL = WDTPW+WDTCNTCL+WDTSSEL0+WDTIS2;//复位时间 1s
    SYS_Init();
SYSCFG0 =  FRWPPW|DFWP;
restart++;
SYSCFG0 = FRWPPW|PFWP | DFWP;
      
    while(1)
    {
     TA0R = Timer0Cunt;
//使能Timer0//////////  
  TA0CCR0 = 16384;
     TA0CTL = TASSEL_1 | MC__UP;             // ACLK, UP mode
     TA0CCTL0 |= CCIE;                        // TACCR0 interrupt enabled
//////////////////////
     tmp_count++;
  Comm_Process();  //通讯处理
  Error_Check();
  MeterDateWrite();
//关闭Timer0//////////
  TA0CCTL0 = 0;
  TA0CTL = 0;
  TA0CCR0 =0;
//////////////////////
  Timer0Cunt = TA0R;
        WDTCTL = WDTPW | WDTHOLD;  
     __bis_SR_register(LPM4_bits|GIE);     // Enter LPM
        __no_operation();                     // For debugger
    }
}
#pragma vector=PORT2_VECTOR
__interrupt void Port_2 (void)
{
Pluse_Cont();
WDTCTL = WDTPW+WDTCNTCL+WDTSSEL0+WDTIS2;//复位时间 1s
__bic_SR_register_on_exit(LPM4_bits); // Exit LPM0 on reti
}
#pragma vector=USCI_A0_VECTOR
__interrupt void USCI_A0_ISR(void)
{
UART_Rece();
WDTCTL = WDTPW+WDTCNTCL+WDTSSEL0+WDTIS2;//复位时间 1s
__bic_SR_register_on_exit(LPM4_bits); // Exit LPM0 on reti
}

#pragma vector = TIMER0_A0_VECTOR
__interrupt void Timer_A (void)
{
tmp_count1++;
    WDTCTL = WDTPW+WDTCNTCL+WDTSSEL1+WDTIS2;
}

求大神知道怎么降低功耗  
此帖出自小平头技术问答