mirror of
https://github.com/Keychron/qmk_firmware.git
synced 2024-12-26 19:18:03 +06:00
23839b8c6d
* Clarify the license for files we have signoff on * Update against the currently signed off files * Remove unused and not clearly licensed headers * Replace an #endif I accidentally removed while resolving merge conflicts
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* 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
|