improved logging

python_app/generator_sweep/pwm.py

@@ -3,8 +3,11 @@
 from __future__ import annotations
 
 from dataclasses import dataclass, field
+import logging
 from pathlib import Path
 
+logger = logging.getLogger(__name__)
+
 
 _PWM_CHANNEL_BY_PIN = {
     12: 0,
@@ -53,12 +56,14 @@ class HardwarePwmGate:
             self._pwm = HardwarePWM(pwm_channel=channel, hz=self.frequency_hz, chip=0)
         except Exception as exc:
             config_hint = _boot_config_hint()
+            logger.exception("Failed to initialize hardware PWM on GPIO%d (channel %d)", self.pin, channel)
             raise RuntimeError(
                 "Failed to initialize Raspberry Pi hardware PWM. "
                 f"Enable the PWM overlay in {config_hint} by adding "
                 "'dtoverlay=pwm-2chan', then reboot the Raspberry Pi."
             ) from exc
         self._running = False
+        logger.info("Hardware PWM opened on GPIO%d at %d Hz", self.pin, self.frequency_hz)
 
     def enable(self) -> None:
         """Start PWM output when not already running."""
@@ -81,6 +86,8 @@ class HardwarePwmGate:
     def close(self) -> None:
         """Stop PWM and release runtime state."""
         self.disable()
+        if self._pwm is not None:
+            logger.info("Hardware PWM closed on GPIO%d", self.pin)
         self._pwm = None