#include <msp430g2553.h>

#define TRIGGER 12000

#define DATA BIT0 //DS 1.0
#define CLOCK BIT4 // SH_CP 1.4
#define LATCH BIT5 // ST_CP 1.5
#define ENABLE BIT6 // OE 1.6
#define BUTTON BIT3 // BP 1.3
#define DIGIT1 BIT3
#define DIGIT2 BIT2
#define DIGIT3 BIT1
#define DIGIT4 BIT0

#define B0 0b11111100
#define B1 0b01100000
#define B2 0b11011010
#define B3 0b11110010
#define B4 0b01100110
#define B5 0b10110110
#define B6 0b10111110
#define B7 0b11100000
#define B8 0b11111110
#define B9 0b11110110


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

void configTimerA2(void);

void main(void) {
	WDTCTL = WDTPW + WDTHOLD;			//stop watchdog
	P1DIR |= (DATA + CLOCK + LATCH + ENABLE);	//mise en sortie
	P2DIR |= (DIGIT1 + DIGIT2 + DIGIT3 + DIGIT4);

	P1OUT |= ENABLE;		//activer le OE sur shift
	P2OUT &= ~DIGIT1;
	P2OUT &= ~DIGIT2;
	P2OUT &= ~DIGIT3;
	P2OUT &= ~DIGIT4;


	int i, m=0, c=0, d=0, u=0;
	for(;;) {
		P2OUT |= DIGIT1;
		switch(u) {
			case 0: { shiftOut(B0); break;}
			case 1: { shiftOut(B1); break;}
			case 2: { shiftOut(B2); break;}
			case 3: { shiftOut(B3); break;}
			case 4: { shiftOut(B4); break;}
			case 5: { shiftOut(B5); break;}
			case 6: { shiftOut(B6); break;}
			case 7: { shiftOut(B7); break;}
			case 8: { shiftOut(B8); break;}
			case 9: { shiftOut(B9); break;}
		}
		u++;
		if(u>9) {
			d++;
			u=0;
		}
		
		P2OUT &= ~DIGIT1;
		P2OUT |= DIGIT2;
                switch(d) {
	                case 0: { shiftOut(B0); break;}
			case 1: { shiftOut(B1); break;}
                        case 2: { shiftOut(B2); break;}
			case 3: { shiftOut(B3); break;}
			case 4: { shiftOut(B4); break;}
			case 5: { shiftOut(B5); break;}
			case 6: { shiftOut(B6); break;}
			case 7: { shiftOut(B7); break;}
			case 8: { shiftOut(B8); break;}
			case 9: { shiftOut(B9); break;}
		}
		
		if(d>9) {
			c++;
			d=0;
		}
		
		P2OUT &= ~DIGIT2;
		P2OUT |= DIGIT3;	

		switch(c) {
			case 0: { shiftOut(B0); break;}
			case 1: { shiftOut(B1); break;}
                        case 2: { shiftOut(B2); break;}
			case 3: { shiftOut(B3); break;}
			case 4: { shiftOut(B4); break;}
			case 5: { shiftOut(B5); break;}
			case 6: { shiftOut(B6); break;}
			case 7: { shiftOut(B7); break;}
			case 8: { shiftOut(B8); break;}
			case 9: { shiftOut(B9); break;}
		}
		P2OUT &= ~DIGIT3;
		P2OUT |= DIGIT4;	

		switch(m) {
			case 0: { shiftOut(B0); break;}
			case 1: { shiftOut(B1); break;}
                        case 2: { shiftOut(B2); break;}
			case 3: { shiftOut(B3); break;}
			case 4: { shiftOut(B4); break;}
			case 5: { shiftOut(B5); break;}
			case 6: { shiftOut(B6); break;}
			case 7: { shiftOut(B7); break;}
			case 8: { shiftOut(B8); break;}
			case 9: { shiftOut(B9); break;}
		}
		P2OUT &= ~DIGIT4;
	}




}
	

void configTimerA2(void) {
	CCTL0 = CCIE;
	CCR0 = 12000;
	TACTL = TASSEL_1 + MC_2; // TimerA control register = select ACLK2 + Continous mode
	_BIS_SR(GIE);
	
}


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

void shiftOut(unsigned char val) {

	P1OUT &= ~LATCH;

	int i;

	for(i=0; i<8; i++) {
		pinWrite(DATA, (val & (1 << i)));
		pulseClock();
	}

	P1OUT |= LATCH;
	P1OUT &= ~LATCH;

}

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

void pulseClock(void) {
	P1OUT |= CLOCK;
	P1OUT &= ~CLOCK;
}


#pragma vector=TIMERA0_VECTOR
      __interrupt void Timer_A(void) {

}