adc_arch.h

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/*
 * Copyright (C) 2022 Gunar Schorcht
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
#ifdef __cplusplus
extern "C" {
#endif
 
#include "periph/adc.h"
#include "periph/gpio.h"
 
#include "driver/adc.h"
#include "driver/adc_types_legacy.h"

typedef enum {
    ADC_ATTENUATION_0_DB = ADC_ATTEN_DB_0,    
    ADC_ATTENUATION_3_DB = ADC_ATTEN_DB_2_5,  
    ADC_ATTENUATION_6_DB = ADC_ATTEN_DB_6,    
    ADC_ATTENUATION_12_DB = ADC_ATTEN_DB_12,  
} adc_attenuation_t;

#define ADC_ATTENUATION_11_DB   ADC_ATTENUATION_12_DB

int adc_set_attenuation(adc_t line, adc_atten_t atten);

int adc_raw_to_voltage(adc_t line, int sample, int *voltage);
 
#if !DOXYGEN
__attribute__((__deprecated__))
int adc_line_vref_to_gpio(adc_t line, gpio_t gpio);
 
#if defined(CPU_FAM_ESP32)
__attribute__((__deprecated__))
static inline int adc_vref_to_gpio25(void)
{
    return adc_vref_to_gpio(ADC_UNIT_2, GPIO25);
}
#endif
#endif /* !DOXYGEN */
 
#ifdef __cplusplus
}
#endif