Refactor radar system

python_app/hardware_full/switch_drivers/h7992_driver.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 from dataclasses import dataclass, field
+from contextlib import suppress
 
 from python_app.hardware_full.switch_drivers.gpio_uapi import GpioOutputLines
 
@@ -29,12 +30,6 @@ class H7992Driver:
     _is_open: bool = field(init=False, default=False, repr=False)
     _current_position: int = field(init=False, default=0, repr=False)
 
-    def __post_init__(self) -> None:
-        """Initialize runtime state."""
-        self._lines: GpioOutputLines | None = None
-        self._is_open = False
-        self._current_position = 0
-
     def open(self) -> None:
         """Open GPIO lines and switch to default position."""
         if self._is_open:
@@ -46,16 +41,21 @@ class H7992Driver:
             offsets=(self.pin_a, self.pin_b),
             consumer=f"radar_{self.name}",
         )
-        self._lines.open()
-        self._is_open = True
-        self.switch_to(self.default_position)
+        try:
+            self._lines.open()
+            self._is_open = True
+            self.switch_to(self.default_position)
+        except Exception:
+            with suppress(Exception):
+                self.close()
+            raise
 
     def close(self) -> None:
         """Close GPIO lines."""
-        if self._lines is not None:
-            self._lines.close()
-            self._lines = None
+        lines, self._lines = self._lines, None
         self._is_open = False
+        if lines is not None:
+            lines.close()
 
     def position_count(self) -> int:
         """Return number of supported positions."""