void init_port();
void init_pwm();

void setup() {
  init_port();
  init_pwm();
}

void loop() {
  // Main loop code goes here
}

void init_port() {
  DDRD |= (1 << PD5); // Set PD5 (OC1A) as an output
}

void init_pwm() {
  TCCR1A |= (1 << WGM10);  // Set WGM10 for 8-bit Fast PWM
  TCCR1A |= (1 << COM1A1); // Clear OC1A on compare match, set at BOTTOM
  TCCR1B |= (1 << WGM12);  // Complete Fast PWM mode configuration (WGM12)

  OCR1A = 127; // 50% duty cycle (127/255)

  TCCR1B |= (1 << CS11); // Set prescaler to 8 for moderate PWM frequency
}