#include <msp430g2553.h>

// 74HC Pins
#define DATA BIT0 //DS 1.0
#define CLOCK BIT4 // SH_CP 1.4
#define LATCH BIT5 // ST_CP 1.5

//4017 Pins
#define CLOCKCP	BIT6	// Clock 1.2
#define RESET	BIT3	// Reset 1.3


//Declaration des prototypes de fonctions
void delay(unsigned int ms);
void pushRegister(int val);
void pinWrite(unsigned int bit, unsigned char val);


void main(void) {
	WDTCTL = WDTPW + WDTHOLD;				//stop watchdog
	P1DIR |= (DATA + CLOCK + LATCH + CLOCKCP + RESET);	//mise en sortie

	P1OUT |= RESET;		//on reset le 4017
	P1OUT &= ~RESET;

	for(;;) {

		pushRegister(0b11111100);		
		pushRegister(0b11111000);
		pushRegister(0b11110000);
		pushRegister(0b11100000);
		pushRegister(0b11000000);
		pushRegister(0b10000000);
		pushRegister(0b00000000);
		pushRegister(0b11111111);
		P1OUT |= RESET;
		P1OUT &= ~RESET;
	}

}

void delay(unsigned int ms) {
	while(ms--) {
		__delay_cycles(1000);
	}
}

void pushRegister(int val) {

	P1OUT &= ~LATCH;

	int i;

	for(i=0; i<8; i++) {
		pinWrite(DATA, (val & (1 << i)));
		P1OUT |= CLOCK;		//clock 74HC
		P1OUT &= ~CLOCK;
	}

	P1OUT |= LATCH;
	P1OUT &= ~LATCH;
	
	for(i=0; i<8; i++) {
		pinWrite(DATA, 0);
		P1OUT |= CLOCK;		//clock 74hc
		P1OUT &= ~CLOCK;
	}

	P1OUT |= LATCH;
	P1OUT |= CLOCKCP;		//clock 4017
	P1OUT &= ~CLOCKCP;


}

void pinWrite(unsigned int bit, unsigned char val) {
	if(val) P1OUT |= bit;
	else P1OUT &= ~bit;
}