#define BUTTON_CONFIG() (P1DIR &= ~BIT3, P1REN |= BIT3, P1OUT |= BIT3, P1IES |= BIT3);
#define BUTTON_ENABLE() (P1IFG &= ~BIT3, P1IE |= BIT3)
#define BUTTON_CONFIG() (P1DIR &= ~BIT3, P1REN |= BIT3, P1OUT |= BIT3, P1IES |= BIT3);
#define BUTTON_ENABLE() (P1IFG &= ~BIT3, P1IE |= BIT3)