arduino-esp32/cores/esp32/esp32-hal-adc.h

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/*
Arduino.h - Main include file for the Arduino SDK
Copyright (c) 2005-2013 Arduino Team. All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef MAIN_ESP32_HAL_ADC_H_
#define MAIN_ESP32_HAL_ADC_H_
#ifdef __cplusplus
extern "C" {
#endif
#include "esp32-hal.h"
typedef enum {
ADC_0db,
ADC_2_5db,
ADC_6db,
ADC_11db
} adc_attenuation_t;
/*
* Get ADC value for pin
* */
uint16_t analogRead(uint8_t pin);
/*
* Sets the sample bits
* Default is 12bit (0 - 4095)
* Range is 9 - 12
* */
void analogSetWidth(uint8_t bits);
/*
* Set number of cycles per sample
* Default is 8 and seems to do well
* Range is 1 - 255
* */
void analogSetCycles(uint8_t cycles);
/*
* Set number of samples in the range.
* Default is 1
* Range is 1 - 255
* This setting splits the range into
* "samples" pieces, which could look
* like the sensitivity has been multiplied
* that many times
* */
void analogSetSamples(uint8_t samples);
/*
* Set the divider for the ADC clock.
* Default is 1
* Range is 1 - 255
* */
void analogSetClockDiv(uint8_t clockDiv);
/*
* Set the attenuation for all channels
* Default is 11db
* */
void analogSetAttenuation(adc_attenuation_t attenuation);
/*
* Set the attenuation for particular pin
* Default is 11db
* */
void analogSetPinAttenuation(uint8_t pin, adc_attenuation_t attenuation);
/*
* Get value for HALL sensor (without LNA)
* connected to pins 36(SVP) and 39(SVN)
* */
int hallRead();
#ifdef __cplusplus
}
#endif
#endif /* MAIN_ESP32_HAL_ADC_H_ */