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esphome/esphome/components/adc/__init__.py
Jesse Hills fe1371f4dc [adc] Fix FILTER_SOURCE_FILES location (#10673)
2025-09-10 22:32:04 -05:00

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from esphome import pins
import esphome.codegen as cg
from esphome.components.esp32 import VARIANT_ESP32P4, get_esp32_variant
from esphome.components.esp32.const import (
VARIANT_ESP32,
VARIANT_ESP32C2,
VARIANT_ESP32C3,
VARIANT_ESP32C5,
VARIANT_ESP32C6,
VARIANT_ESP32H2,
VARIANT_ESP32S2,
VARIANT_ESP32S3,
)
import esphome.config_validation as cv
from esphome.const import CONF_ANALOG, CONF_INPUT, CONF_NUMBER, PLATFORM_ESP8266
from esphome.core import CORE
CODEOWNERS = ["@esphome/core"]
adc_ns = cg.esphome_ns.namespace("adc")
"""
From the below patch versions (and 5.2+) ADC_ATTEN_DB_11 is deprecated and replaced with ADC_ATTEN_DB_12.
4.4.7
5.0.5
5.1.3
5.2+
"""
ATTENUATION_MODES = {
"0db": cg.global_ns.ADC_ATTEN_DB_0,
"2.5db": cg.global_ns.ADC_ATTEN_DB_2_5,
"6db": cg.global_ns.ADC_ATTEN_DB_6,
"11db": adc_ns.ADC_ATTEN_DB_12_COMPAT,
"12db": adc_ns.ADC_ATTEN_DB_12_COMPAT,
"auto": "auto",
}
sampling_mode = adc_ns.enum("SamplingMode", is_class=True)
SAMPLING_MODES = {
"avg": sampling_mode.AVG,
"min": sampling_mode.MIN,
"max": sampling_mode.MAX,
}
adc_unit_t = cg.global_ns.enum("adc_unit_t", is_class=True)
adc_channel_t = cg.global_ns.enum("adc_channel_t", is_class=True)
# pin to adc1 channel mapping
# https://github.com/espressif/esp-idf/blob/v4.4.8/components/driver/include/driver/adc.h
ESP32_VARIANT_ADC1_PIN_TO_CHANNEL = {
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32/include/soc/adc_channel.h
VARIANT_ESP32: {
36: adc_channel_t.ADC_CHANNEL_0,
37: adc_channel_t.ADC_CHANNEL_1,
38: adc_channel_t.ADC_CHANNEL_2,
39: adc_channel_t.ADC_CHANNEL_3,
32: adc_channel_t.ADC_CHANNEL_4,
33: adc_channel_t.ADC_CHANNEL_5,
34: adc_channel_t.ADC_CHANNEL_6,
35: adc_channel_t.ADC_CHANNEL_7,
},
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c2/include/soc/adc_channel.h
VARIANT_ESP32C2: {
0: adc_channel_t.ADC_CHANNEL_0,
1: adc_channel_t.ADC_CHANNEL_1,
2: adc_channel_t.ADC_CHANNEL_2,
3: adc_channel_t.ADC_CHANNEL_3,
4: adc_channel_t.ADC_CHANNEL_4,
},
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c3/include/soc/adc_channel.h
VARIANT_ESP32C3: {
0: adc_channel_t.ADC_CHANNEL_0,
1: adc_channel_t.ADC_CHANNEL_1,
2: adc_channel_t.ADC_CHANNEL_2,
3: adc_channel_t.ADC_CHANNEL_3,
4: adc_channel_t.ADC_CHANNEL_4,
},
# ESP32-C5 ADC1 pin mapping - based on official ESP-IDF documentation
# https://docs.espressif.com/projects/esp-idf/en/latest/esp32c5/api-reference/peripherals/gpio.html
VARIANT_ESP32C5: {
1: adc_channel_t.ADC_CHANNEL_0,
2: adc_channel_t.ADC_CHANNEL_1,
3: adc_channel_t.ADC_CHANNEL_2,
4: adc_channel_t.ADC_CHANNEL_3,
5: adc_channel_t.ADC_CHANNEL_4,
6: adc_channel_t.ADC_CHANNEL_5,
},
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c6/include/soc/adc_channel.h
VARIANT_ESP32C6: {
0: adc_channel_t.ADC_CHANNEL_0,
1: adc_channel_t.ADC_CHANNEL_1,
2: adc_channel_t.ADC_CHANNEL_2,
3: adc_channel_t.ADC_CHANNEL_3,
4: adc_channel_t.ADC_CHANNEL_4,
5: adc_channel_t.ADC_CHANNEL_5,
6: adc_channel_t.ADC_CHANNEL_6,
},
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32h2/include/soc/adc_channel.h
VARIANT_ESP32H2: {
1: adc_channel_t.ADC_CHANNEL_0,
2: adc_channel_t.ADC_CHANNEL_1,
3: adc_channel_t.ADC_CHANNEL_2,
4: adc_channel_t.ADC_CHANNEL_3,
5: adc_channel_t.ADC_CHANNEL_4,
},
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32s2/include/soc/adc_channel.h
VARIANT_ESP32S2: {
1: adc_channel_t.ADC_CHANNEL_0,
2: adc_channel_t.ADC_CHANNEL_1,
3: adc_channel_t.ADC_CHANNEL_2,
4: adc_channel_t.ADC_CHANNEL_3,
5: adc_channel_t.ADC_CHANNEL_4,
6: adc_channel_t.ADC_CHANNEL_5,
7: adc_channel_t.ADC_CHANNEL_6,
8: adc_channel_t.ADC_CHANNEL_7,
9: adc_channel_t.ADC_CHANNEL_8,
10: adc_channel_t.ADC_CHANNEL_9,
},
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32s3/include/soc/adc_channel.h
VARIANT_ESP32S3: {
1: adc_channel_t.ADC_CHANNEL_0,
2: adc_channel_t.ADC_CHANNEL_1,
3: adc_channel_t.ADC_CHANNEL_2,
4: adc_channel_t.ADC_CHANNEL_3,
5: adc_channel_t.ADC_CHANNEL_4,
6: adc_channel_t.ADC_CHANNEL_5,
7: adc_channel_t.ADC_CHANNEL_6,
8: adc_channel_t.ADC_CHANNEL_7,
9: adc_channel_t.ADC_CHANNEL_8,
10: adc_channel_t.ADC_CHANNEL_9,
},
VARIANT_ESP32P4: {
16: adc_channel_t.ADC_CHANNEL_0,
17: adc_channel_t.ADC_CHANNEL_1,
18: adc_channel_t.ADC_CHANNEL_2,
19: adc_channel_t.ADC_CHANNEL_3,
20: adc_channel_t.ADC_CHANNEL_4,
21: adc_channel_t.ADC_CHANNEL_5,
22: adc_channel_t.ADC_CHANNEL_6,
23: adc_channel_t.ADC_CHANNEL_7,
},
}
# pin to adc2 channel mapping
# https://github.com/espressif/esp-idf/blob/v4.4.8/components/driver/include/driver/adc.h
ESP32_VARIANT_ADC2_PIN_TO_CHANNEL = {
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32/include/soc/adc_channel.h
VARIANT_ESP32: {
4: adc_channel_t.ADC_CHANNEL_0,
0: adc_channel_t.ADC_CHANNEL_1,
2: adc_channel_t.ADC_CHANNEL_2,
15: adc_channel_t.ADC_CHANNEL_3,
13: adc_channel_t.ADC_CHANNEL_4,
12: adc_channel_t.ADC_CHANNEL_5,
14: adc_channel_t.ADC_CHANNEL_6,
27: adc_channel_t.ADC_CHANNEL_7,
25: adc_channel_t.ADC_CHANNEL_8,
26: adc_channel_t.ADC_CHANNEL_9,
},
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c2/include/soc/adc_channel.h
VARIANT_ESP32C2: {
5: adc_channel_t.ADC_CHANNEL_0,
},
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c3/include/soc/adc_channel.h
VARIANT_ESP32C3: {
5: adc_channel_t.ADC_CHANNEL_0,
},
# ESP32-C5 has no ADC2 channels
VARIANT_ESP32C5: {}, # no ADC2
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32c6/include/soc/adc_channel.h
VARIANT_ESP32C6: {}, # no ADC2
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32h2/include/soc/adc_channel.h
VARIANT_ESP32H2: {}, # no ADC2
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32s2/include/soc/adc_channel.h
VARIANT_ESP32S2: {
11: adc_channel_t.ADC_CHANNEL_0,
12: adc_channel_t.ADC_CHANNEL_1,
13: adc_channel_t.ADC_CHANNEL_2,
14: adc_channel_t.ADC_CHANNEL_3,
15: adc_channel_t.ADC_CHANNEL_4,
16: adc_channel_t.ADC_CHANNEL_5,
17: adc_channel_t.ADC_CHANNEL_6,
18: adc_channel_t.ADC_CHANNEL_7,
19: adc_channel_t.ADC_CHANNEL_8,
20: adc_channel_t.ADC_CHANNEL_9,
},
# https://github.com/espressif/esp-idf/blob/master/components/soc/esp32s3/include/soc/adc_channel.h
VARIANT_ESP32S3: {
11: adc_channel_t.ADC_CHANNEL_0,
12: adc_channel_t.ADC_CHANNEL_1,
13: adc_channel_t.ADC_CHANNEL_2,
14: adc_channel_t.ADC_CHANNEL_3,
15: adc_channel_t.ADC_CHANNEL_4,
16: adc_channel_t.ADC_CHANNEL_5,
17: adc_channel_t.ADC_CHANNEL_6,
18: adc_channel_t.ADC_CHANNEL_7,
19: adc_channel_t.ADC_CHANNEL_8,
20: adc_channel_t.ADC_CHANNEL_9,
},
VARIANT_ESP32P4: {
49: adc_channel_t.ADC_CHANNEL_0,
50: adc_channel_t.ADC_CHANNEL_1,
51: adc_channel_t.ADC_CHANNEL_2,
52: adc_channel_t.ADC_CHANNEL_3,
53: adc_channel_t.ADC_CHANNEL_4,
54: adc_channel_t.ADC_CHANNEL_5,
},
}
def validate_adc_pin(value):
if str(value).upper() == "VCC":
if CORE.is_rp2040:
return pins.internal_gpio_input_pin_schema(29)
return cv.only_on([PLATFORM_ESP8266])("VCC")
if str(value).upper() == "TEMPERATURE":
return cv.only_on_rp2040("TEMPERATURE")
if CORE.is_esp32:
conf = pins.internal_gpio_input_pin_schema(value)
value = conf[CONF_NUMBER]
variant = get_esp32_variant()
if (
variant not in ESP32_VARIANT_ADC1_PIN_TO_CHANNEL
and variant not in ESP32_VARIANT_ADC2_PIN_TO_CHANNEL
):
raise cv.Invalid(f"This ESP32 variant ({variant}) is not supported")
if (
value not in ESP32_VARIANT_ADC1_PIN_TO_CHANNEL[variant]
and value not in ESP32_VARIANT_ADC2_PIN_TO_CHANNEL[variant]
):
raise cv.Invalid(f"{variant} doesn't support ADC on this pin")
return conf
if CORE.is_esp8266:
conf = pins.gpio_pin_schema(
{CONF_ANALOG: True, CONF_INPUT: True}, internal=True
)(value)
if conf[CONF_NUMBER] != 17: # A0
raise cv.Invalid("ESP8266: Only pin A0 (GPIO17) supports ADC")
return conf
if CORE.is_rp2040:
conf = pins.internal_gpio_input_pin_schema(value)
number = conf[CONF_NUMBER]
if number not in (26, 27, 28, 29):
raise cv.Invalid("RP2040: Only pins 26, 27, 28 and 29 support ADC")
return conf
if CORE.is_libretiny:
return pins.gpio_pin_schema(
{CONF_ANALOG: True, CONF_INPUT: True}, internal=True
)(value)
if CORE.is_nrf52:
return pins.gpio_pin_schema(
{CONF_ANALOG: True, CONF_INPUT: True}, internal=True
)(value)
raise NotImplementedError
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