#define F_CPU 8000000UL

#include <avr/io.h>
#include <stdio.h>
#include <inttypes.h>
#include <stdint.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <util/atomic.h>

#define BAUDRATE 9600

#define NTCBETA 3600

#define ONTEMP 4.0	// °C
#define OFFTEMP 2.0	// °C

#define ONTIME 60	// sec
#define OFFTIME 180	// sec

// attiny48
// pins
// 	1 : PB5 reset, ADC0
// 	2 : PB3 ADC3 / COMPRESSOR
// 	3 : PB4 ADC2 / CAP
// 	4 :     gnd
// 	5 : PB0 Mosi, AREF
// 	6 : PB1 Miso / TX
// 	7 : PB2 SCK, ADC1 / NTC
// 	8 :     VCC

#define COMPPIN PINB
#define COMPDDR DDRB
#define COMPPORT PORTB
#define COMPBIT 3

#define CAPPIN PINB
#define CAPDDR DDRB
#define CAPPORT PORTB
#define CAPBIT 4

#define NTCPIN PINB
#define NTCPORT PORTB
#define NTCDDR DDRB
#define NTCMUX 1
#define NTCBIT 2

#define UARTTXPIN PINB
#define UARTTXPORT PORTB
#define UARTTXDDR DDRB
#define UARTTXBIT 1

//
//
//
//


volatile uint32_t secs = 0;
volatile uint32_t cycles = 0;
volatile uint8_t status = 0;
volatile uint16_t tstatus = 0;

void usart_bitdelay() {
	_delay_us(1000000/BAUDRATE); // 1e6 us / baudrate
}

void usart_putchar(char data) {
	// 0 start, LSB...MSB, 1 stop
	uint8_t i;

	// start bit, 0
	UARTTXPORT &= ~(1 << UARTTXBIT);
	usart_bitdelay();

	// 8 data bits
	for (i = 0; i < 7; i++) {
		if (data && 0x01) {
			// 1
			UARTTXPORT |= (1 << UARTTXBIT);
		} else
			// 0
			UARTTXPORT &= ~(1 << UARTTXBIT);
		}
		data = (data >> 1);
		usart_bitdelay();
	}


	// stop bit, 1
	UARTTXPORT |= (1 << UARTTXBIT);
	usart_bitdelay();
}

static FILE mystdout = FDEV_SETUP_STREAM(usart_putchar, NULL, _FDEV_SETUP_WRITE);



void getTemp() {
	nop();
}

void printData() {
	uint32_t lsecs;
	uint16_t lhours;
	uint8_t  lmins;

	uint8_t lstatus;
	uint16_t ltstatus;

	double ltemp;

	ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
		lsecs = secs;
		lstatus = status;
		ltstatus = tstatus;
	};

	lhours = lsecs / 3600;
	lsecs = lsecs - (lhours * 3600);

	lmins = lsecs / 60;
	lsecs = lsecs - (lmins * 60);
		
	// xx_hour : xx_min : xx_sec _ _ Temp: +/- xx.x °C _ _ Status: [_on|off|_LO|] _ _ Since: xxxxx sec \n
	printf_P("%05d:%02d:%02d   ", lhours, lmins, lsecs);
	printf_P("Temperature: % 05.1f °C   ", ltemp);
	printf_P("Status: %s   ", lstatus);
	printf_P("Since: %5d secs\n", ltstatus);
}

int main(void) {

	// set compressor pin to output, set to low
	COMPDDR |= (1<<COMPPIN);
	COMPPORT &= ~(1<<COMPPIN);

	// set capacitor pin to input with pullup
	
	
	// set adc
	
	// set timer
	
	// set uart
	
	// wait for cap to be empty
	
	//
	printData();

	return(0);
}