#include <stdint.h>
#include <stdbool.h>
#include <msp430.h>

#define interrupt(x) void __attribute__((interrupt (x)))

uint8_t recvbyte, enable;
int8_t cmd;

void delay_ms(uint16_t ms) {
    while (ms--)
        __delay_cycles(1000);
}

/*void send(char data) {
    UCA0TXBUF = data;
    while (!(IFG2 & UCA0TXIFG)) ;
}*/

void set(bool on) {
    P2OUT |= BIT0 | (on ? BIT1 : BIT2);
    P1OUT |= BIT0;

    delay_ms(200);

    P2OUT = 0;
    P1OUT &= ~BIT0;

    delay_ms(1000);
}

int main() {
    WDTCTL = WDTPW | WDTHOLD;

    BCSCTL1 = CALBC1_1MHZ;
    DCOCTL = CALDCO_1MHZ;

    P1REN = BIT3;
    P1DIR = BIT0;
    P1OUT = BIT3;

    //UCA0CTL1 |= UCSSEL_2; // SMCLK clock

    // http://mspgcc.sourceforge.net/cgi-bin/msp-uart.pl?clock=1000000&baud=9600&submit=calculate
    //UCA0BR0 = 0x68;
    //UCA0BR1 = 0x00;
    //UCA0MCTL = 0x04;
    
    // http://mspgcc.sourceforge.net/cgi-bin/msp-uart.pl?clock=8000000&baud=115200&submit=calculate
    //UCA0BR0 = 0x45;
    //UCA0BR1 = 0x00;
    //UCA0MCTL = 0xAA;

    // UART
    //P1SEL = 0x02 | 0x04;
    //P1SEL2 = 0x02 | 0x04; // RXD on P1.1, TXD on P1.2

    //P1OUT = 0x00;
    //P1DIR |= BIT0 | BIT6;

    // Everything as GPIO
    P2SEL &= ~(BIT6 | BIT7);
    P2OUT = 0x00;
    P2DIR = 0xFF;

    //UCA0CTL1 &= ~UCSWRST; // Start UART

    //IE2 |= UCA0RXIE;

    __enable_interrupt();

    P1OUT |= BIT0;
    delay_ms(200);
    P1OUT &= ~BIT0;
    delay_ms(200);

    cmd = -1;

    while (true) {
        while (cmd == -1)
            delay_ms(100);

        if (cmd == 0)
            set(false);
        else if (cmd == 1)
            set(true);

        cmd = -1;
    }   
    
    while (true) {
        P2OUT |= BIT0 | BIT1;
        P1OUT |= BIT0;

        delay_ms(200);

        P2OUT = 0;
        P1OUT &= ~BIT0;

        delay_ms(1000);

        while (P1IN & BIT3) ;
    }

    return 0;
}

/*interrupt(USCIAB0RX_VECTOR) uart_rx_isr() { 
    recvbyte = UCA0RXBUF;

    if (!enable) {
        if (recvbyte == 0x81) {
            enable = true;
            __bic_status_register_on_exit(LPM3_bits);
        }

        return;
    }

    if (recvbyte == 0x82)
        enable = false;
}*/