89 lines
3.4 KiB
Python
89 lines
3.4 KiB
Python
import threading, queue, time, csv, os
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CHUNK = 2000
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OUTDIR = "logs"
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os.makedirs(OUTDIR, exist_ok=True)
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class DeviceController:
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def __init__(self, dev):
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self.dev = dev
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self.cmdq = queue.Queue()
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self.stop_evt = threading.Event()
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self.running = False
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self.writer_q = queue.Queue(maxsize=50)
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self.reader_t = threading.Thread(target=self.reader_loop, daemon=True)
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self.writer_t = threading.Thread(target=self.writer_loop, daemon=True)
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def start(self):
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if not self.reader_t.is_alive(): self.reader_t.start()
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if not self.writer_t.is_alive(): self.writer_t.start()
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self.cmdq.put(("start", None))
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def stop(self):
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self.cmdq.put(("stop", None))
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def set_mode(self, ch, mode):
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self.cmdq.put(("mode", (ch, mode)))
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def shutdown(self):
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self.stop()
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self.stop_evt.set()
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self.reader_t.join()
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self.writer_t.join()
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def reader_loop(self):
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while not self.stop_evt.is_set():
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# Befehle abarbeiten (non-blocking)
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try:
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cmd, arg = self.cmdq.get_nowait()
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if cmd == "start" and not self.running:
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# kontinuierlich laufen lassen (0 == unendlich)
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self.dev.run(0) # ← per-Gerät-Start
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self.running = True
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elif cmd == "stop" and self.running:
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self.dev.cancel() # ← per-Gerät-Stop (sofort)
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# optional sauber aus: self.dev.off()
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self.dev.flush(-1, True) # Read-Queue leeren
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self.running = False
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elif cmd == "mode":
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ch, mode = arg # ch: 0 (A) / 1 (B)
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self.set_mode(ch, mode)
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except queue.Empty:
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pass
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if self.running:
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# blockierend n Samples holen
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try:
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data = self.dev.read([], CHUNK, -1, False) # pysmu mappt auf [ [VA,IA,VB,IB], ... ]
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# In einfachem CSV-Beispiel loggen wir nur Spannungen A/B:
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# data ist Liste von 4-Float-Arrays
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vsA = [row[0] for row in data]
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vsB = [row[2] for row in data]
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self.writer_q.put((time.time(), vsA, vsB))
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except Exception:
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# bei Überlauf o.ä. kurz atmen und weiter
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time.sleep(0.001)
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else:
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time.sleep(0.01)
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def writer_loop(self):
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ts0 = None
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fn = os.path.join(OUTDIR, f"{time.strftime('%Y%m%d_%H%M%S')}_{self.dev.serial}.csv")
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with open(fn, "w", newline="") as f:
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w = csv.writer(f)
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w.writerow(["t_rel_s", "ch", "value"])
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sample_idx = 0
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while not (self.stop_evt.is_set() and self.writer_q.empty()):
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try:
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ts, va, vb = self.writer_q.get(timeout=0.2)
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except Exception:
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continue
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if ts0 is None: ts0 = ts
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for i, v in enumerate(va):
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t_rel = (sample_idx + i) * 1e-5 # 100 kS/s → 10 µs
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w.writerow([t_rel, "A", v])
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for i, v in enumerate(vb):
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t_rel = (sample_idx + i) * 1e-5
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w.writerow([t_rel, "B", v])
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sample_idx += len(va)
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print(f"[{self.dev.serial}] Datei geschlossen.") |