MSP430单片机IO面面观

P2IFG&=0x00;

_EINT(); //开总中断允许

LPM4; //（LOW POWER MODE）进入低功耗模式4,此时单片机功耗最低

}

//***************************************************************

//P1口中断服务程序

#pragma vector=PORT1_VECTOR

__interrupt void p1int(void)

{

if((P1IFG&0xf0)==0x10) P1OUT=0xf1;

else if((P1IFG&0xf0)==0x20) P1OUT=0xf2;

else if((P1IFG&0xf0)==0x40) P1OUT=0xf4;

else if((P1IFG&0xf0)==0x80) P1OUT=0xf8;

P1IFG &= 0x00;

}

#pragma vector=PORT2_VECTOR

__interrupt void p2_port(void)

{

if((P2IFG&0x0f)==0x01) P2OUT=0x04;

else if((P2IFG&0x0f)==0x02) P2OUT=0x08;

P2IFG &= 0x00;

}