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esphome-dev/esphome/components/pcf8574/__init__.py
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Python

import esphome.codegen as cg
import esphome.config_validation as cv
from esphome import pins
from esphome.components import i2c
from esphome.const import CONF_ID, CONF_NUMBER, CONF_MODE, CONF_INVERTED
DEPENDENCIES = ["i2c"]
MULTI_CONF = True
pcf8574_ns = cg.esphome_ns.namespace("pcf8574")
PCF8574GPIOMode = pcf8574_ns.enum("PCF8574GPIOMode")
PCF8674_GPIO_MODES = {
"INPUT": PCF8574GPIOMode.PCF8574_INPUT,
"OUTPUT": PCF8574GPIOMode.PCF8574_OUTPUT,
}
PCF8574Component = pcf8574_ns.class_("PCF8574Component", cg.Component, i2c.I2CDevice)
PCF8574GPIOPin = pcf8574_ns.class_("PCF8574GPIOPin", cg.GPIOPin)
CONF_PCF8574 = "pcf8574"
CONF_PCF8575 = "pcf8575"
CONFIG_SCHEMA = (
cv.Schema(
{
cv.Required(CONF_ID): cv.declare_id(PCF8574Component),
cv.Optional(CONF_PCF8575, default=False): cv.boolean,
}
)
.extend(cv.COMPONENT_SCHEMA)
.extend(i2c.i2c_device_schema(0x21))
)
def to_code(config):
var = cg.new_Pvariable(config[CONF_ID])
yield cg.register_component(var, config)
yield i2c.register_i2c_device(var, config)
cg.add(var.set_pcf8575(config[CONF_PCF8575]))
def validate_pcf8574_gpio_mode(value):
value = cv.string(value)
if value.upper() == "INPUT_PULLUP":
raise cv.Invalid(
"INPUT_PULLUP mode has been removed in 1.14 and been combined into "
"INPUT mode (they were the same thing). Please use INPUT instead."
)
return cv.enum(PCF8674_GPIO_MODES, upper=True)(value)
PCF8574_OUTPUT_PIN_SCHEMA = cv.Schema(
{
cv.Required(CONF_PCF8574): cv.use_id(PCF8574Component),
cv.Required(CONF_NUMBER): cv.int_,
cv.Optional(CONF_MODE, default="OUTPUT"): validate_pcf8574_gpio_mode,
cv.Optional(CONF_INVERTED, default=False): cv.boolean,
}
)
PCF8574_INPUT_PIN_SCHEMA = cv.Schema(
{
cv.Required(CONF_PCF8574): cv.use_id(PCF8574Component),
cv.Required(CONF_NUMBER): cv.int_,
cv.Optional(CONF_MODE, default="INPUT"): validate_pcf8574_gpio_mode,
cv.Optional(CONF_INVERTED, default=False): cv.boolean,
}
)
@pins.PIN_SCHEMA_REGISTRY.register(
"pcf8574", (PCF8574_OUTPUT_PIN_SCHEMA, PCF8574_INPUT_PIN_SCHEMA)
)
def pcf8574_pin_to_code(config):
parent = yield cg.get_variable(config[CONF_PCF8574])
yield PCF8574GPIOPin.new(
parent, config[CONF_NUMBER], config[CONF_MODE], config[CONF_INVERTED]
)