diff options
Diffstat (limited to 'drivers/avr/analog.h')
| -rw-r--r-- | drivers/avr/analog.h | 37 |
1 files changed, 16 insertions, 21 deletions
diff --git a/drivers/avr/analog.h b/drivers/avr/analog.h index 1b773d82ce..058882450d 100644 --- a/drivers/avr/analog.h +++ b/drivers/avr/analog.h @@ -14,45 +14,40 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ -#ifndef _analog_h_included__ -#define _analog_h_included__ +#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_POWER (1 << REFS0) -#define ADC_REF_INTERNAL ((1 << REFS1) | (1 << REFS0)) -#define ADC_REF_EXTERNAL (0) +#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 -# define ADC_PRESCALER ((1 << ADPS2) | (1 << ADPS1)) +#if F_CPU == 16000000L || F_CPU == 12000000L +# define ADC_PRESCALER (_BV(ADPS2) | _BV(ADPS1)) // /64 #elif F_CPU == 8000000L -# define ADC_PRESCALER ((1 << ADPS2) | (1 << ADPS0)) +# define ADC_PRESCALER (_BV(ADPS2) | _BV(ADPS0)) // /32 #elif F_CPU == 4000000L -# define ADC_PRESCALER ((1 << ADPS2)) +# define ADC_PRESCALER (_BV(ADPS2)) // /16 #elif F_CPU == 2000000L -# define ADC_PRESCALER ((1 << ADPS1) | (1 << ADPS0)) +# define ADC_PRESCALER (_BV(ADPS1) | _BV(ADPS0)) // /8 #elif F_CPU == 1000000L -# define ADC_PRESCALER ((1 << ADPS1)) +# define ADC_PRESCALER _BV(ADPS1) // /4 #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 - +# define ADC_PRESCALER _BV(ADPS0) // /2 #endif |