45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
import time,json
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from datetime import datetime
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import RPi.GPIO as GPIO
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configfile="config.json"
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cf=open(configfile,"r")
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log_conf=json.load(cf)
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cf.close()
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parameter={"device":socket.gethostname(),"mean_count":5,"ring_length":10,"wait":0.5,"sigma":2,"cycle":10}
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for n in parameter:
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if n in log_conf:
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parameter[n]=log_conf[n]
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def tube_impulse_callback(channel): # threaded callback -- falling edge detected
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global counter # make counter global to be able to increment it
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counter+=1
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print "ping"
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bgeiger=False
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if "geiger" in log_conf:
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bgeiger=True
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GPIO.setmode(GPIO.BOARD) # use RaspPi board layout pin numbering
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GPIO.setup(32, GPIO.IN, pull_up_down=GPIO.PUD_UP)
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counter = 0
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# when a falling edge is detected on port 12, regardless of whatever
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# else is happening in the program, the tube_impulse_callback will be run
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GPIO.add_event_detect(32, GPIO.FALLING, callback=tube_impulse_callback)
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if bgeiger:
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try:
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while True:
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currentMinute = datetime.now().minute
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while datetime.now().minute == currentMinute: # this minute..
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time.sleep(1) # .. wait while add_event_detect detects pulses
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print str(counter)+" cpm"
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counter=0 # reset counter
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except KeyboardInterrupt:
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GPIO.cleanup() # clean up GPIO on CTRL+C exit
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except:
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GPIO.cleanup() # clean up GPIO on normal exit
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