gistfile1.c

#include "msp430g2231.h"
 
 

void main(void) {
   	WDTCTL = WDTPW + WDTHOLD;
	P1DIR |= BIT5;
	P1OUT = 0;
	
	TACCR0 = 1000;
	TACCTL0 = CCIE; // enable interrupt
	TACTL = TASSEL_2 | ID_0 | MC_1 | TACLR; // timer settings
	
	
	_enable_interrupt();
	
	
	while (1) {
		
	}
	
}
 
int value = 0;
 
#pragma vector = TIMERA0_VECTOR
__interrupt void CCR0_ISR(void) {
    
	if (value == 0) P1OUT |= BIT5; else P1OUT &= ~BIT5;
	value = ~value;
    
} // CCR0_ISR