/* main.c
*
*
* Created: 9/24/2019 2:15:19 PM
* Author: wfarmer, dlenfesty
*/

// CLKDIV8 was set on our processor
#define F_CPU 1200000UL
#define ON_TIME 9 // On time for pulses, accounting for overhead
#define END_TIME 87.5 // Off time at the end of the pulse train (tuned for overhead + clock drift)
#define NUM_PULSES 15

#include <avr/io.h>
#include <util/delay.h>

int main(void) {
  DDRB |= (1 << DDB3);

  // Set PB5 low
  PORTB &= ~(1 << PORTB3);

  // Main loop
  while (1) {
    // Loop for all pulses, high then low, excluding 15th low pulse, which is 100us
    for (uint8_t i = 0; i < (NUM_PULSES * 2) - 1; i++) {
      // Toggle PB5
      PORTB ^= (1 << PORTB3);
      _delay_us(ON_TIME);
    }

    // Last low pulse
    PORTB &= ~(1 << PORTB3);
    _delay_us(END_TIME);
  }
}