40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
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import serial
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import queue
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import threading
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class InductionHeater:
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"""Interface to the MHS5200A function generator driving the LC tank"""
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def __init__(self, port, induction_min, induction_max):
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self.port = port
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self.induction_min = induction_min
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self.induction_max = induction_max
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self.queue = queue.Queue(1)
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def start(self):
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self.serial = serial.Serial(self.port, 57600)
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self.thread = threading.Thread(target=self.thread_target)
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self.thread.start()
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def thread_target(self):
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while True:
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amount = self.queue.get()
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if amount is None:
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break
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amount = max(min(amount, 0.5), -0.5)
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freq = ((self.induction_min + self.induction_max)/2
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+ amount*(self.induction_max - self.induction_min))
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command = ":s1f{:010d}\n".format(int(freq*1e2))
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self.serial.write(command.encode())
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self.serial.readline()
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def set(self, amount):
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self.queue.put(amount, block=False)
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def stop(self):
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self.queue.put(None, block=True)
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self.thread.join()
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self.serial.close()
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