MSP430 LED Blink

led_blink.c

#include <msp430.h> 


/**
 * main.c
 */
int main(void)
{
	WDTCTL = WDTPW | WDTHOLD;	// stop watchdog timer

	// Disable the GPIO power-on default high-impedance mode to activate
	// previously configured port settings
	PM5CTL0 &= ~LOCKLPM5;
	// Configure GPIO
	P1DIR = 0;                                // Sets all to input that button S2
	P1DIR |= BIT0;                            // Set P1.0 to output direction LED2
	P4DIR |= BIT6;                            // Set P4.6 to output direction LED1
	P1REN |= BIT1;                            // activate pullup resistors for buttons S2
	P1OUT |= BIT1;
	for(;;){
	    volatile unsigned int i;

	    if(!(P1IN & 0x02)){
	        P1OUT ^=0x01; // Toggle LED 1
	        P4OUT &=~BIT6;//0xBF;
	    }
	    else{
	        P4OUT ^=0x40; // Toggle LED 2
	        P1OUT &=~BIT1;//0xFE;
	    }
	    i=10000;
	    do{
	        --i;
	    }
	    while(i != 0);

	}
}