23 lines
463 B
23 lines
463 B
2 months ago
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import os
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import time
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import struct
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from openpilot.system.hardware.hw import Paths
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WATCHDOG_FN = f"{Paths.shm_path()}/wd_"
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_LAST_KICK = 0.0
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def kick_watchdog():
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global _LAST_KICK
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current_time = time.monotonic()
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if current_time - _LAST_KICK < 1.0:
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return
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try:
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with open(f"{WATCHDOG_FN}{os.getpid()}", 'wb') as f:
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f.write(struct.pack('<Q', int(current_time * 1e9)))
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f.flush()
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_LAST_KICK = current_time
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except OSError:
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pass
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