单片机MSP430G2553--常规按键中断程序.txt

#include <msp430.h> 

void delay_ms(int Time);

/**
 * main.c
 */
int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // stop watchdog timer
P1SEL &= ~(BIT2 | BIT3 | BIT5 | BIT6);  //~0x4C // P1.2/P1.3/P1.5/P1.6 as GPIO
P1SEL2 &= ~(BIT2 | BIT3 | BIT5 | BIT6); //~0x4C // P1.2/P1.3/P1.5/P1.6 as GPIO
P1DIR &= ~(BIT2 | BIT3);    //P1.2/P1.3 as INPUT
P1DIR |= (BIT5 | BIT6);     //P1.5/P1.6 as OUTPUT
P1REN |= (BIT2 | BIT3);     //P1.2/P1.3上下拉使能
P1OUT |= (BIT2 | BIT3);     //P1.2/P1.3上拉
P1OUT &= ~(BIT5 | BIT6);    //P1.5/P1.6对应的LED熄灭
P1IE |= (BIT2 | BIT3);      //P1.2/P1.3中断使能
P1IES |= (BIT2 | BIT3);     //P1.2/P1.3下降沿有效
P1IFG &= ~(BIT2 | BIT3);    //清除P1.2/P1.3中断标志位
_enable_interrupts();       //开全局中断
while(1)
    ;
// return 0;
}

#pragma vector = PORT1_VECTOR
__interrupt void PORT1_ISR(void)
{
    if(P1IFG & BIT2)            //判断中断源为P1.2