#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