MSP430G2452按键(P1.3)操控P1.0(LED)灯亮灭C言语程序，P1.3为带上拉电阻的输入状况，P1.0为输出状况，当P1.3按下，P1.0口LED灯则亮，松开按键，LED灯则平息，无限循环的下去！程序如下：
#include “msp430g2452.h”
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
P1DIR = 0x01; // P1.0 output, else input
P1OUT = 0x08; // P1.3 set, else reset
P1REN |= 0x08; // P1.3 pullup
while (1) // Test P1.3
{
if(0x08 & P1IN)
{
P1OUT |= 0x01; // if P1.3 set, set P1.0
}
else P1OUT &= ~0x01; // else reset
}
}
