/*
 Created on :   29 Sep 2017
 Author:        Maciej Ryba
 */

#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>

#include "LCD/lcd44780.h"

uint16_t pomiar(uint8_t kanal);
uint32_t map(uint16_t x, uint16_t in_min, uint16_t in_max, uint16_t out_min, uint16_t out_max);

int main()
{
    lcd_init();

    uint16_t volt;
    uint32_t procent;

    /* Konfiguracja ADC */
    ADMUX |= (1<<REFS0); //| (1<<REFS1);            // Vref = Vcc
    ADCSRA |= (1<<ADPS0) | (1<<ADPS0) | (1<<ADPS0); // preskaler 128
    ADCSRA |= (1<<ADEN);                            // ADC enable
    /*                  */


    for(;;)
    {
        volt = pomiar(0);
        //lcd_cls();
        lcd_locate(0,0);
        lcd_int(volt);

        procent = map(volt, 0, 1023, 0, 100);
        lcd_locate(1,0);
        lcd_int(procent);
        //_delay_ms(25);
    }

}

uint16_t pomiar(uint8_t kanal)
{
    ADMUX = (ADMUX & 0xF8) | kanal; // wybrany kanal ADC

    ADCSRA |= (1<<ADSC); // start pomiaru

    return ADCW; // pomiar z rejestrów ADCH i ADCL
}

uint32_t map(uint16_t x, uint16_t in_min, uint16_t in_max, uint16_t out_min, uint16_t out_max)
{
  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}