#include "msp430g2231.h"

unsigned serData = 0x00;

void shiftData(void);
void shiftOutInit(void);

void main(void) {
	WDTCTL = WDTPW + WDTHOLD;
	P1DIR = 0x07;
	P1OUT = 0x00;

	shiftOutInit();

	while(1) {
		shiftData();
		__delay_cycles(0xFFFF);
		__delay_cycles(0xFFFF);
	}
}

void shiftData(void) {
	serData = serData << 1;
		if(!(0x08 & P1IN)) serData |= 0x01;
}