adc.h

/*
ADC Library 0x05

copyright (c) Davide Gironi, 2013

Released under GPLv3.
Please refer to LICENSE file for licensing information.
*/


#ifndef ADC_H
#define ADC_H

//setup values
#define ADC_REF 1 //adc reference voltage (see adc_init function for reference)
#define ADC_PRESCALER 128 //adc prescaler (2, 4, 8, 16, 32, 64, 128)
#define ADC_JUSTIFY 'R' //adc justify ('L' or 'R')
#define ADC_TRIGGERON 0 //adc trigger (1 on - 0 off)
#define ADC_REFRES 1024 //reference resolution used for conversions

//bandgap reference voltage * 1000, refers to datasheet
#if defined (__AVR_ATmega168__) || defined (__AVR_ATmega168P__) || defined (__AVR_ATmega328__) || defined (__AVR_ATmega328P__)
#define ADC_BANDGAPVOLTAGE 1100L
#elif defined (__AVR_ATmega8__)
#define ADC_BANDGAPVOLTAGE 1300L
#endif

//functions
extern void adc_setchannel(uint8_t channel);
extern uint16_t adc_read(uint8_t channel);
extern uint16_t adc_readsel(void);
extern void adc_init(void);
extern double acd_getrealvref(void);
extern long adc_getresistence(uint16_t adcread, uint16_t adcbalanceresistor);
extern double adc_getvoltage(uint16_t adcread, double adcvref);
extern unsigned int adc_emafilter(unsigned int newvalue, unsigned int value);

#endif