shoot.c

/* 
 * shoot.c -- ARDUINO UNO code
 * v1.0
 * Created: May 12, 2017 09:45:27 AM
 * Author: Francesco Urbani
 * demo aruino uno: https://youtu.be/ytz441CO3a4
 * 
 *
 *	note:
 *	plug the IR pcb into pin [1, 3] of 
 *	the arduino uno and upload the code.
 *	there is no control whatsoever, so the camera will 
 *	shoot as long as the IR beams reach the receiver of the DSLR.
 *
 */



#define F_CPU           16000000UL  // 16 MHz
#include <avr/sleep.h>
#include <avr/io.h>
#include <util/delay.h>

#define HPERIOD         0.01524     // 15.24 us
#define NPULSES         16
#define INSTANT         7.33        // 7.77 ms
#define DELAYED         5.36        // 5.36 ms

#define VCC             0b00000100  // PD2
#define GND	            0b00000010  // PD1
#define IRLED           0b00001000  // PD3

#define ARDUINOLED      0b00100000  // PB5


void setup(void)
{
	/* setup IOs */
	DDRD |= IRLED;          /* set IRLED as output */
	DDRD |= (VCC | GND);    /* set VCC and GND i.e. digital pins 1 and 2 as output */
	PORTD |= VCC;           /* set VCC high */
	PORTD &= ~GND;          /* set GND low */

	DDRB |= ARDUINOLED;     /* set arduino led (pin 13) as output */

	/* Reduce power consumption */
	ADCSRA &= ~_BV(ADEN);   /* Disable ADC */
	ACSR &= ~_BV(ACD);      /* Disable the analog comparator */
}



void flashIRLED(void)
{
	for(uint8_t i=0; i<NPULSES; i++) {
		PORTD |= IRLED;
		_delay_ms(HPERIOD);
		PORTD &= ~IRLED;
		_delay_ms(HPERIOD);
	}
	return;
}


void 
flashArduinoLED()
{
	PORTB |= ARDUINOLED;
	_delay_ms(20);
	PORTB &= ~ARDUINOLED;
	return;
}


void
shoot(void)
{
	flashIRLED();
	_delay_ms(INSTANT);
	flashIRLED();
	return;
}


int
main(void)
{
	setup();
	while (1)
	{
		shoot();
		flashArduinoLED();

		_delay_ms(2020);
	}

	return 0;
}