#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include "USART.h"

/*
OBJECTIVE:

pulse the infrared transmitter (prefferably with a code of 'clc') at a given rate.
if the pulse is recieved, transmit, or pass off, a run command for Python to pickup via serial.

*/
/*
PIN LAYOUT
Transmitter on PC5
Reciever on PB0
*/


void fireT(){
    // fires the transmitter
    PORTC ^= (1 << PC5);
    _delay_ms(750);  // wait
}


ISR(INT0_vect) {         /* Run every time there is a change on button */
    printString("run\n");
    fireI();
  }


void initInterrupt0(void) {
  EIMSK |= (1 << INT0);                                 /* enable INT0 */
  EICRA |= (1 << ISC00);                /* trigger when button changes */
  sei();                          /* set (global) interrupt enable bit */
}


void initMCU(void){
    // initialize the board setup for proper operation
    DDRB = 0x00; // Ensures configuration of register B for input
    DDRC = 0xff; // configures register C for output
}


void fireI(){
    // fires the transmitter
    PORTC ^= (1 << PC3);
    _delay_ms(500);  // wait
}



int main(void){
    // main function to execute objeective listed above
    initMCU(); //init
    initInterrupt0();
    initUSART();
    while(1){
        // test cycle fire function
        fireT();
    }

    return 0;
}