#include <avr/interrupt.h>
#include <avr/sleep.h>
#include <dio.h>

/*
#include <simavr/avr/avr_mcu_section.h>
AVR_MCU(F_CPU, "attiny85");

const struct avr_mmcu_vcd_trace_t _mytrace[] _MMCU_ = {
	{ AVR_MCU_VCD_SYMBOL("GTCCR"), .what = (void *)&GTCCR, },
	{ AVR_MCU_VCD_SYMBOL("TCCR0A"), .what = (void *)&TCCR0A, },
	{ AVR_MCU_VCD_SYMBOL("TCCR0B"), .what = (void *)&TCCR0B, },
	{ AVR_MCU_VCD_SYMBOL("PORTB"), .what = (void *)&PORTB, },
	{ AVR_MCU_VCD_SYMBOL("TCNT0"), .what = (void *)&TCNT0, },
};
*/

#define FPS                 10
#define FPS_MS              1000 / FPS
#define MULT                5

/*
typedef struct {
    uint8_t value;
    int8_t inc;
} counter_t;

void counter_update(counter_t *self) {
    int16_t value = self->value;
    value += self->inc;

    if (value >= 255) {
        self->value = 255;
        self->inc = -1;
    } else if (value <= 0) {
        self->value = 0;
        self->inc = 1;
    } else {
        self->value = value;
    }
}
*/

int main(void) {
    DDRB = 0xff;
    PORTB = 0;

    TCCR0A = _BV(COM0A1) | _BV(COM0B1) | _BV(WGM01) | _BV(WGM00);
    TCCR0B = _BV(CS00);

    uint8_t brightness = 1;

    GTCCR = 0;

    while(1) {
        OCR0A = brightness;
        OCR0B = brightness;

        _delay_ms(100);

        brightness += 1;
    }

    return 0;
}