/* 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/>. */ #pragma once #include <stdint.h> #include "quantum.h" #ifdef __cplusplus extern "C" { #endif void analogReference(uint8_t mode); int16_t analogRead(uint8_t pin); int16_t analogReadPin(pin_t pin); uint8_t pinToMux(pin_t pin); int16_t adc_read(uint8_t mux); #ifdef __cplusplus } #endif #define ADC_REF_EXTERNAL 0 // AREF, Internal Vref turned off #define ADC_REF_POWER _BV(REFS0) // AVCC with external capacitor on AREF pin #define ADC_REF_INTERNAL (_BV(REFS1) | _BV(REFS0)) // Internal 2.56V Voltage Reference with external capacitor on AREF pin (1.1V for 328P) // These prescaler values are for high speed mode, ADHSM = 1 #if F_CPU == 16000000L || F_CPU == 12000000L # define ADC_PRESCALER (_BV(ADPS2) | _BV(ADPS1)) // /64 #elif F_CPU == 8000000L # define ADC_PRESCALER (_BV(ADPS2) | _BV(ADPS0)) // /32 #elif F_CPU == 4000000L # define ADC_PRESCALER (_BV(ADPS2)) // /16 #elif F_CPU == 2000000L # define ADC_PRESCALER (_BV(ADPS1) | _BV(ADPS0)) // /8 #elif F_CPU == 1000000L # define ADC_PRESCALER _BV(ADPS1) // /4 #else # define ADC_PRESCALER _BV(ADPS0) // /2 #endif