#include <avr/io.h>
#include <util/delay.h>
#include <avr/pgmspace.h>
#include "main.h"
#include "1wire.h"
#include "gtext.h"
#include "sed1335.h"
#include "ds18b20.h"
#include "dac8571.h"

#include "display.h"

volatile struct timers timers;

unsigned char getkey(void){
	static unsigned char old;
	unsigned char key;
	DDRA = 0;
	PORTA = 0xff;
	DDRC |= _BV(PC7);
	_delay_ms(2);
	key = ~PINA;
	DDRC &= ~_BV(PC7);
	PORTA = 0;
	DDRA = 0xff;
	if(key == old) return 0;
	old = key;
	return key;
}

void main(void){
	unsigned char i=0;
/*	unsigned char state = STATE_DEFAULT;
	unsigned char oldstate = state;*/
	unsigned int dac1 = 0, dac2 = 32768;
	
	
	OCR2A = 250; // 16ms
	TCCR2A = _BV(WGM21);
	TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20);
	TIMSK2 = _BV(OCIE2A);
	sei();

	PORTC &= _BV(PC7);
	DDRB |= _BV(PB2);
	
	GLCD_Initialize();
	GLCD_Clear();
	for(;;){
		_delay_ms(1);
		if(i = getkey()){
			cursor(0,0);
			disp_num(i);
			clearline();
		}
		dac8571_set(++dac1, VOLT_DAC);
		dac8571_set(++dac2, CURR_DAC);
/*		gettemp();
		control();
		state = state_processors[state](state);
		if(oldstate != state){
			GLCD_Clear();
			settings_update = 1;
		}
		oldstate = state; 
		send_595(&led, 1);*/
	}
}

ISR(TIMER2_COMPA_vect){ // 16ms
	unsigned int *volatile ctimer;
	unsigned char i;
	
	for(i=0; i<sizeof(timers)/sizeof(unsigned int); i++){
		ctimer = ((unsigned int *)&timers) + i;
		if(*ctimer)
			(*ctimer)--;
	}
}