MSP430_Stuff/clock_test/main.c

#include <msp430g2553.h>

void main (void)
{
	WDTCTL = WDTPW + WDTHOLD;

	P1DIR = 0x41;
	P1OUT = 0x01;

	BCSCTL3 |= LFXT1S_2;
	IFG1 &= ~OFIFG;
	__bis_SR_register(SCG1 + SCG0);
	BCSCTL2 |= SELM_3 + DIVM_3;

	while (1)
	{
		P1OUT = 0x41;
		__delay_cycles(100);
                P1OUT = 0x00;
		__delay_cycles(100);
                P1OUT = 0x40;
		__delay_cycles(100);
		P1OUT = 0x00;
		__delay_cycles(1000);
	}
}