27 lines
654 B
Python
27 lines
654 B
Python
import threading
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from dataclasses import dataclass
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def hex2b(s: str) -> bytes:
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return bytes(int(x, 16) for x in s.split())
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@dataclass
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class SerialConfig:
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port: str
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baudrate: int = 9600
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class SerialBridge:
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def __init__(self, cfg: SerialConfig):
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self.cfg = cfg
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self._lock = threading.Lock()
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def busy(self):
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return self._lock.locked()
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def send_and_read_once(self, payload: bytes):
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if not self._lock.acquire(blocking=False):
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return {"busy": True, "error": "BUSY"}
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try:
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return {"ok": True, "request": payload.hex()}
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finally:
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self._lock.release()
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