36 lines
923 B
C
36 lines
923 B
C
#ifndef _analog_h_included__
|
|
#define _analog_h_included__
|
|
|
|
#include <stdint.h>
|
|
|
|
void analogReference(uint8_t mode);
|
|
int16_t analogRead(uint8_t pin);
|
|
int16_t adc_read(uint8_t mux);
|
|
|
|
#define ADC_REF_POWER (1<<REFS0)
|
|
#define ADC_REF_INTERNAL ((1<<REFS1) | (1<<REFS0))
|
|
#define ADC_REF_EXTERNAL (0)
|
|
|
|
// These prescaler values are for high speed mode, ADHSM = 1
|
|
#if F_CPU == 16000000L
|
|
#define ADC_PRESCALER ((1<<ADPS2) | (1<<ADPS1))
|
|
#elif F_CPU == 8000000L
|
|
#define ADC_PRESCALER ((1<<ADPS2) | (1<<ADPS0))
|
|
#elif F_CPU == 4000000L
|
|
#define ADC_PRESCALER ((1<<ADPS2))
|
|
#elif F_CPU == 2000000L
|
|
#define ADC_PRESCALER ((1<<ADPS1) | (1<<ADPS0))
|
|
#elif F_CPU == 1000000L
|
|
#define ADC_PRESCALER ((1<<ADPS1))
|
|
#else
|
|
#define ADC_PRESCALER ((1<<ADPS0))
|
|
#endif
|
|
|
|
// some avr-libc versions do not properly define ADHSM
|
|
#if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__)
|
|
#if !defined(ADHSM)
|
|
#define ADHSM (7)
|
|
#endif
|
|
#endif
|
|
|
|
#endif
|