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mirror of https://github.com/esphome/esphome.git synced 2025-03-28 05:28:14 +00:00

77 lines
2.3 KiB
Python

from esphome import pins
import esphome.codegen as cg
from esphome.components import i2c
from esphome.components.i2c import I2CBus
import esphome.config_validation as cv
from esphome.const import (
CONF_I2C_ID,
CONF_ID,
CONF_INPUT,
CONF_INVERTED,
CONF_MODE,
CONF_NUMBER,
CONF_OPEN_DRAIN,
CONF_OUTPUT,
)
CODEOWNERS = ["@jesterret", "@clydebarrow"]
DEPENDENCIES = ["i2c"]
MULTI_CONF = True
ch422g_ns = cg.esphome_ns.namespace("ch422g")
CH422GComponent = ch422g_ns.class_("CH422GComponent", cg.Component, i2c.I2CDevice)
CH422GGPIOPin = ch422g_ns.class_(
"CH422GGPIOPin", cg.GPIOPin, cg.Parented.template(CH422GComponent)
)
CONF_CH422G = "ch422g"
# Note that no address is configurable - each register in the CH422G has a dedicated i2c address
CONFIG_SCHEMA = cv.Schema(
{
cv.GenerateID(CONF_ID): cv.declare_id(CH422GComponent),
cv.GenerateID(CONF_I2C_ID): cv.use_id(I2CBus),
}
).extend(cv.COMPONENT_SCHEMA)
async def to_code(config):
var = cg.new_Pvariable(config[CONF_ID])
await cg.register_component(var, config)
# Can't use register_i2c_device because there is no CONF_ADDRESS
parent = await cg.get_variable(config[CONF_I2C_ID])
cg.add(var.set_i2c_bus(parent))
# This is used as a final validation step so that modes have been fully transformed.
def pin_mode_check(pin_config, _):
if pin_config[CONF_MODE][CONF_INPUT] and pin_config[CONF_NUMBER] >= 8:
raise cv.Invalid("CH422G only supports input on pins 0-7")
if pin_config[CONF_MODE][CONF_OPEN_DRAIN] and pin_config[CONF_NUMBER] < 8:
raise cv.Invalid("CH422G only supports open drain output on pins 8-11")
CH422G_PIN_SCHEMA = pins.gpio_base_schema(
CH422GGPIOPin,
cv.int_range(min=0, max=11),
modes=[CONF_INPUT, CONF_OUTPUT, CONF_OPEN_DRAIN],
).extend(
{
cv.Required(CONF_CH422G): cv.use_id(CH422GComponent),
}
)
@pins.PIN_SCHEMA_REGISTRY.register(CONF_CH422G, CH422G_PIN_SCHEMA, pin_mode_check)
async def ch422g_pin_to_code(config):
var = cg.new_Pvariable(config[CONF_ID])
parent = await cg.get_variable(config[CONF_CH422G])
cg.add(var.set_parent(parent))
num = config[CONF_NUMBER]
cg.add(var.set_pin(num))
cg.add(var.set_inverted(config[CONF_INVERTED]))
cg.add(var.set_flags(pins.gpio_flags_expr(config[CONF_MODE])))
return var