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63 lines
2.1 KiB
Python
63 lines
2.1 KiB
Python
import esphome.codegen as cg
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import esphome.config_validation as cv
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from esphome import pins
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from esphome.const import CONF_FREQUENCY, CONF_ID, CONF_SCAN, CONF_SCL, CONF_SDA, CONF_ADDRESS, \
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CONF_I2C_ID
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from esphome.core import coroutine, coroutine_with_priority
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i2c_ns = cg.esphome_ns.namespace('i2c')
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I2CComponent = i2c_ns.class_('I2CComponent', cg.Component)
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I2CDevice = i2c_ns.class_('I2CDevice')
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MULTI_CONF = True
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CONFIG_SCHEMA = cv.Schema({
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cv.GenerateID(): cv.declare_id(I2CComponent),
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cv.Optional(CONF_SDA, default='SDA'): pins.input_pin,
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cv.Optional(CONF_SCL, default='SCL'): pins.input_pin,
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cv.Optional(CONF_FREQUENCY, default='50kHz'):
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cv.All(cv.frequency, cv.Range(min=0, min_included=False)),
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cv.Optional(CONF_SCAN, default=True): cv.boolean,
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}).extend(cv.COMPONENT_SCHEMA)
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@coroutine_with_priority(1.0)
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def to_code(config):
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cg.add_global(i2c_ns.using)
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var = cg.new_Pvariable(config[CONF_ID])
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yield cg.register_component(var, config)
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cg.add(var.set_sda_pin(config[CONF_SDA]))
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cg.add(var.set_scl_pin(config[CONF_SCL]))
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cg.add(var.set_frequency(int(config[CONF_FREQUENCY])))
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cg.add(var.set_scan(config[CONF_SCAN]))
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cg.add_library('Wire', None)
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def i2c_device_schema(default_address):
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"""Create a schema for a i2c device.
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:param default_address: The default address of the i2c device, can be None to represent
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a required option.
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:return: The i2c device schema, `extend` this in your config schema.
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"""
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schema = {
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cv.GenerateID(CONF_I2C_ID): cv.use_id(I2CComponent),
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}
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if default_address is None:
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schema[cv.Required(CONF_ADDRESS)] = cv.i2c_address
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else:
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schema[cv.Optional(CONF_ADDRESS, default=default_address)] = cv.i2c_address
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return cv.Schema(schema)
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@coroutine
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def register_i2c_device(var, config):
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"""Register an i2c device with the given config.
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Sets the i2c bus to use and the i2c address.
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This is a coroutine, you need to await it with a 'yield' expression!
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"""
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parent = yield cg.get_variable(config[CONF_I2C_ID])
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cg.add(var.set_i2c_parent(parent))
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cg.add(var.set_i2c_address(config[CONF_ADDRESS]))
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