#include <in430.h>
#include <intrinsics.h>
#include <msp430f1611.h>
#include <stdint.h>

#define DEBOUNCE_VALUE 20  // approx 20ms
#define BUT_A 0x04
#define BUT_B 0x02
#define TXD BIT2
#define RXD BIT1

#define PERIOD 64
#define MIN_BRIGHTNESS 0
#define MAX_BRIGHTNESS 7

volatile uint8_t buttonStates = 0;

volatile uint8_t buttonADebounce = 0;
volatile uint8_t buttonBDebounce = 0;

volatile uint8_t brightness = MIN_BRIGHTNESS;
volatile uint8_t digit = 0;
volatile uint8_t string[8] = {0,1,2,3,9,5,6,8};
volatile uint8_t brightnessMap[MAX_BRIGHTNESS] = {PERIOD-1, PERIOD*4/5, PERIOD*3/5, PERIOD/2, PERIOD/4, PERIOD/8, PERIOD/16};

volatile uint8_t shouldRefresh = 0;

void init();
void handleDisplay();


int main(void) {
    WDTCTL = WDTPW | WDTHOLD;	// Stop watchdog timer
    BCSCTL2 = SELM_3 | SELS;
    init();
    P2OUT = 0xFE;
    while(1) {  }
}


inline void init() {
	TBCCR0 = 80; // approx 100 us
    //TBCCTL0 = CCIE; // enable ints
    TBCTL = TBSSEL_1 + MC_1 + ID_0; //wybieramy ACLK (32768Hz), tryb UP
    TBR = 0; // clear counting reg

    TACCR0 = PERIOD; // 1kHz
    TACCR1 = brightnessMap[brightness];
    TACCTL0 = CCIE; // enable ints
    TACCTL1 = CCIE; // enable ints
    TACTL = TASSEL_1 + MC_1 + ID_0; //wybieramy ACLK (32768Hz), tryb UP
    TAR = 0; // clear counting reg

    P2DIR = 0xFF; // digit select
    P1DIR = 0xFF; // value

	P3SEL |= RXD | TXD; // P1.1 = RXD, P1.2=TXD
    P3DIR = 0x00;

    U0CTL |= SWRST;
    U0CTL |= CHAR; // 8-bit characterUTCTL0 |= SSEL1;
    ME1 |= UTXE0 | URXE0; // Enabled USART0 TXD RXD
    IE1 |= URXIE0 | UTXIE0; //Wlaczenie przerwan dla modulu pobierajacego dane
    // Ustawienia dla 115200
    U0BR0 = 0x40;
    U0BR1 = 0x00;
    U0MCTL = 0x4A;
    U0CTL &= ~SWRST; // Wylaczenie software reset

	_EINT();
}

const char stringtosent[] = { "Hello World\r\n" };
unsigned int i; //Counter

#pragma vector=USART0TX_VECTOR
__interrupt void USCI0TX_ISR(void)
{
	U0TXBUF = stringtosent[i++]; // TX next character
	if (i == sizeof stringtosent - 1) // TX over?
		IE1 &= ~UTXE0; // Disable USCI_A0 TX interrupt
}

#pragma vector=USART0RX_VECTOR
__interrupt void USCI0RX_ISR(void)
{
	if (U0RXBUF == 'a') // 'a' received?
	{
		i = 0;
		IE1 |= UTXE0; // Enable USCI_A0 TX interrupt
		U0TXBUF = stringtosent[i++];
	}
}

#pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A0 (void)
{
	P2OUT = 0xFF;
	P1OUT = (string[7-digit] & 0x0F) | 0xF0;
    P2OUT = ~(1 << digit);
	digit = (digit+1) & 0x07;
}

#pragma vector=TIMERA1_VECTOR
__interrupt void Timer_A1 (void)
{
	switch(TAIV) {
	case 0x00:
		break;
	case 0x02:
		P2OUT = 0xFF;
		break;
	default:
		break;
	}
}

#pragma vector=TIMERB0_VECTOR
__interrupt void Timer_B0 (void)
{
	__bic_SR_register_on_exit(CPUOFF);
}