28 lines
895 B
Python
28 lines
895 B
Python
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#!/usr/bin/python
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import time, signal, sys
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from Adafruit_ADS1x15 import ADS1x15
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def signal_handler(signal, frame):
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#print 'You pressed Ctrl+C!'
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sys.exit(0)
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signal.signal(signal.SIGINT, signal_handler)
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#print 'Press Ctrl+C to exit'
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ADS1015 = 0x00 # 12-bit ADC
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ADS1115 = 0x01 # 16-bit ADC
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# Initialise the ADC using the default mode (use default I2C address)
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# Set this to ADS1015 or ADS1115 depending on the ADC you are using!
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adc = ADS1x15(ic=ADS1115)
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# Read channels 2 and 3 in single-ended mode, at +/-4.096V and 250sps
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volts2 = adc.readADCSingleEnded(2, 4096, 250)/1000.0
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volts3 = adc.readADCSingleEnded(3, 4096, 250)/1000.0
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# Now do a differential reading of channels 2 and 3
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voltsdiff = adc.readADCDifferential23(4096, 250)/1000.0
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# Display the two different reading for comparison purposes
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print ("%.8f %.8f %.8f %.8f" % (volts2, volts3, volts3-volts2, -voltsdiff))
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