74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
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import time
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import threading
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import RPi.GPIO as GPIO
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class TriggerManager:
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def __init__(self, pin: int, active_high: bool = True, pulse_ms: float = 5.0):
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if pin is None or int(pin) < 0:
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raise ValueError("Pin inválido")
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pulse_ms = float(pulse_ms)
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if pulse_ms <= 0:
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raise ValueError("pulse_ms deve ser maior que zero")
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self.pin = int(pin)
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self.active_high = bool(active_high)
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self.pulse_ms = pulse_ms
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self.initialized = False
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self._lock = threading.RLock()
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self._active_level = GPIO.HIGH if self.active_high else GPIO.LOW
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self._idle_level = GPIO.LOW if self.active_high else GPIO.HIGH
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def begin(self):
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with self._lock:
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if self.initialized:
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return True
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try:
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GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
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GPIO.setup(self.pin, GPIO.OUT)
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GPIO.output(self.pin, self._idle_level)
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except Exception as e:
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raise RuntimeError(f"Falha ao inicializar trigger GPIO {self.pin}: {e}") from e
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self.initialized = True
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return True
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def stop(self):
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with self._lock:
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if not self.initialized:
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return True
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try:
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GPIO.output(self.pin, self._idle_level)
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except Exception:
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pass
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try:
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GPIO.cleanup(self.pin)
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except Exception:
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pass
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self.initialized = False
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return True
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def pulse(self):
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with self._lock:
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if not self.initialized:
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raise RuntimeError("TriggerManager não inicializado")
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try:
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GPIO.output(self.pin, self._active_level)
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time.sleep(self.pulse_ms / 1000.0)
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except Exception as e:
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raise RuntimeError(f"Falha ao gerar pulso no GPIO {self.pin}: {e}") from e
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finally:
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try:
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GPIO.output(self.pin, self._idle_level)
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except Exception:
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pass
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return True
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