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55 lines
1.5 KiB
55 lines
1.5 KiB
import os
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from functools import lru_cache
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from typing import Optional, List
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def gpio_init(pin: int, output: bool) -> None:
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try:
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with open(f"/sys/class/gpio/gpio{pin}/direction", 'wb') as f:
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f.write(b"out" if output else b"in")
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except Exception as e:
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print(f"Failed to set gpio {pin} direction: {e}")
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def gpio_set(pin: int, high: bool) -> None:
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try:
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with open(f"/sys/class/gpio/gpio{pin}/value", 'wb') as f:
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f.write(b"1" if high else b"0")
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except Exception as e:
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print(f"Failed to set gpio {pin} value: {e}")
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def gpio_read(pin: int) -> Optional[bool]:
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val = None
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try:
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with open(f"/sys/class/gpio/gpio{pin}/value", 'rb') as f:
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val = bool(int(f.read().strip()))
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except Exception as e:
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print(f"Failed to set gpio {pin} value: {e}")
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return val
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def gpio_export(pin: int) -> None:
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if os.path.isdir(f"/sys/class/gpio/gpio{pin}"):
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return
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try:
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with open("/sys/class/gpio/export", 'w') as f:
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f.write(str(pin))
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except Exception:
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print(f"Failed to export gpio {pin}")
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@lru_cache(maxsize=None)
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def get_irq_action(irq: int) -> List[str]:
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try:
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with open(f"/sys/kernel/irq/{irq}/actions") as f:
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actions = f.read().strip().split(',')
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return actions
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except FileNotFoundError:
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return []
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def get_irqs_for_action(action: str) -> List[str]:
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ret = []
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with open("/proc/interrupts") as f:
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for l in f.readlines():
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irq = l.split(':')[0].strip()
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if irq.isdigit() and action in get_irq_action(irq):
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ret.append(irq)
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return ret
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