jens
f3b3e1c091
git-svn-id: http://moon:8086/svn/projects/HendiControl@266 fda53097-d464-4ada-af97-ba876c37ca34
96 lines
2.0 KiB
Python
96 lines
2.0 KiB
Python
#!/usr/bin/python3
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import time
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import numpy as np
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from matplotlib.pyplot import figure, clf, plot, xlabel, ylabel, xlim, ylim, title, grid, axes, show, subplot
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import signal
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import threading
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#from tempSensorSim import TempSensorSim
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from max31865 import Max31865
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class TempLogger():
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def __init__(self, sensor, filename="temp.log"):
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self.filename = filename
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self.sensor = sensor
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self.temps = np.empty(0)
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self.times = np.empty(0)
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self.time = 0
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self.abort = False
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self.thread = None
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self.sema = threading.Semaphore(0)
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def start(self, dt, duration):
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try:
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if self.thread == None:
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self.thread = threading.Thread(target=self.run, args=(dt, duration,))
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self.thread.start()
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except:
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self.sema.release()
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def stop(self):
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if self.thread:
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self.abort = True
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self.thread.join()
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self.thread = None
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def run(self, *args):
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dt = args[0]
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duration = args[1]
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fp = open(self.filename, 'w')
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while self.time < duration:
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temp = self.sensor.temperature()
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print ("Current temperature is {:0.2f} °C".format(temp))
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self.times = np.append(self.times, self.time)
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self.temps = np.append(self.temps, temp)
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fp.write("{:0.2f} {:0.2f}\n".format(self.time, temp))
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self.time += dt
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time.sleep(dt)
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if self.abort:
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break
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fp.close()
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self.sema.release()
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def wait(self):
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if self.thread:
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self.sema.acquire()
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pass
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def result(self):
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return self.times, self.temps
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if __name__ == '__main__':
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def tempPlot(result):
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figure(1)
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plot(result[0]/60, result[1], 'b-', linewidth=1)
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ylabel('°C/min')
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xlabel('t/min')
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show()
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def handler(signum, frame):
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print('Signal handler called with signal', signum)
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if signum == signal.SIGINT:
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logger.stop()
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if signum == signal.SIGHUP:
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tempPlot(logger.result())
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signal.signal(signal.SIGINT, handler)
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signal.signal(signal.SIGHUP, handler)
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sensor = Max31865()
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# sensor = TempSensorSim("FakeTemp")
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logger = TempLogger(sensor)
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logger.start(1.0, 30*60)
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logger.wait()
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tempPlot(logger.result())
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print("End of program")
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