diff options
author | Nick Brassel <nick@tzarc.org> | 2021-08-29 08:20:25 +1000 |
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committer | Nick Brassel <nick@tzarc.org> | 2021-08-29 08:20:25 +1000 |
commit | f061ca497464fe85284906fb163a33eaee7a91ef (patch) | |
tree | 33ef1bfb529aed382e8526c607c4e18717f92571 /platforms/avr/drivers/analog.h | |
parent | ff65185dec6f97be1eb49f17cea526a0d0bbf3d6 (diff) | |
parent | 4bad375d7c09d949a9dcdd4feba147c9c7a67ec6 (diff) |
Breaking changes develop merge to master, 2021Q3 edition. (#14196)
Diffstat (limited to 'platforms/avr/drivers/analog.h')
-rw-r--r-- | platforms/avr/drivers/analog.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/platforms/avr/drivers/analog.h b/platforms/avr/drivers/analog.h new file mode 100644 index 0000000000..058882450d --- /dev/null +++ b/platforms/avr/drivers/analog.h @@ -0,0 +1,53 @@ +/* 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 |