/* Copyright 2015 Jack Humbert * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #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