adc_arch.h

Go to the documentation of this file.

/*
 * SPDX-FileCopyrightText: 2022 Gunar Schorcht
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#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