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"""Implementation of KNX DPT 3 4-bit control."""
from __future__ import annotations
from collections.abc import Mapping
from dataclasses import dataclass
from typing import Any
from xknx.exceptions import ConversionError
from .dpt import DPTComplex, DPTComplexData
from .dpt_1 import Step, UpDown
from .payload import DPTArray, DPTBinary
@dataclass(slots=True)
class ControlDimming(DPTComplexData):
"""
Class for dimming control.
Range is subdivided into `2**(step_code-1)`; `step_code=0` indicates break.
"""
control: Step
step_code: int # 1..7 higher is more intervals -> slower; 0 stop
@classmethod
def from_dict(cls, data: Mapping[str, Any]) -> ControlDimming:
"""Init from a dictionary."""
try:
control = Step.parse(data["control"])
step_code = int(data["step_code"])
except (KeyError, TypeError, ValueError) as err:
raise ValueError(f"Invalid value for ControlDimming: {err}") from err
return cls(control=control, step_code=step_code)
def as_dict(self) -> dict[str, int | str]:
"""Create a JSON serializable dictionary."""
return {
"control": self.control.name.lower(),
"step_code": self.step_code,
}
class DPTControlDimming(DPTComplex[ControlDimming]):
"""
Abstraction for KNX 4-Bit dimming control.
DPT 3.007
"""
data_type = ControlDimming
payload_type = DPTBinary
payload_length = 4
dpt_main_number = 3
dpt_sub_number = 7
value_type = "control_dimming"
@classmethod
def from_knx(cls, payload: DPTArray | DPTBinary) -> ControlDimming:
"""Parse/deserialize from KNX/IP payload data."""
raw = cls.validate_payload(payload)[0]
return ControlDimming(
control=Step((raw & 0b1000) >> 3),
step_code=raw & 0b0111,
)
@classmethod
def _to_knx(cls, value: ControlDimming) -> DPTBinary:
"""Serialize to KNX/IP raw data."""
if not 0 <= value.step_code <= 7:
raise ConversionError("Invalid value for step_code: must be 0..7")
return DPTBinary(value.control.value << 3 | value.step_code)
@dataclass(slots=True)
class ControlBlinds(DPTComplexData):
"""
Class for blinds control.
Range is subdivided into `2**(step_code-1)`; `step_code=0` indicates break.
"""
control: UpDown
step_code: int # 1..7 higher is more intervals -> slower; 0 stop
@classmethod
def from_dict(cls, data: Mapping[str, Any]) -> ControlBlinds:
"""Init from a dictionary."""
try:
control = UpDown.parse(data["control"])
step_code = int(data["step_code"])
except (KeyError, TypeError, ValueError) as err:
raise ValueError(f"Invalid value for ControlBlinds: {err}") from err
return cls(control=control, step_code=step_code)
def as_dict(self) -> dict[str, int | str]:
"""Create a JSON serializable dictionary."""
return {
"control": self.control.name.lower(),
"step_code": self.step_code,
}
class DPTControlBlinds(DPTComplex[ControlBlinds]):
"""
Abstraction for KNX 4-Bit dimming control.
DPT 3.008
"""
data_type = ControlBlinds
payload_type = DPTBinary
payload_length = 4
dpt_main_number = 3
dpt_sub_number = 8
value_type = "control_blinds"
@classmethod
def from_knx(cls, payload: DPTArray | DPTBinary) -> ControlBlinds:
"""Parse/deserialize from KNX/IP payload data."""
raw = cls.validate_payload(payload)[0]
return ControlBlinds(
control=UpDown((raw & 0b1000) >> 3),
step_code=raw & 0b0111,
)
@classmethod
def _to_knx(cls, value: ControlBlinds) -> DPTBinary:
"""Serialize to KNX/IP raw data."""
if not 0 <= value.step_code <= 7:
raise ConversionError("Invalid value for step_code: must be 0..7")
return DPTBinary(value.control.value << 3 | value.step_code)
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