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18b8ca2633
Added/updated the shebang line on all python examples with: Also chmod +x a few of the python examples. Signed-off-by: Noel Eck <noel.eck@intel.com>
88 lines
3.0 KiB
Python
Executable File
88 lines
3.0 KiB
Python
Executable File
#!/usr/bin/env python
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# Author: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
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# Copyright (c) 2016 Intel Corporation.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# This example demonstrates how to use one of the ADS1115 ADCs on the
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# DFRobot Joule Shield with devices that output a small differential
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# voltage (e.g. geophones, piezoelectric bands or pads, thermocouples).
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from __future__ import print_function
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from threading import Timer
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from time import sleep
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from upm import pyupm_ads1x15 as upm
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def stop():
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global running
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running = False
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def main():
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global running
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running = True
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fileName = './ads1115.data' # Output filename
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id = 0 # Sample number
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# Initialize and configure the ADS1115 for the SM-24 Geophone
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# There are two ADS1115 chips on the DFRobot Joule Shield on the same I2C bus
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# - 0x48 gives access to pins A0 - A3
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# - 0x49 gives access to pins A4 - A7
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ads1115 = upm.ADS1115(0, 0x48)
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# Put the ADC into differential mode for pins A0 and A1,
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# the SM-24 Geophone is connected to these pins
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ads1115.getSample(upm.ADS1X15.DIFF_0_1)
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# Set the gain based on expected VIN range to -/+ 2.048 V
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# Can be adjusted based on application to as low as -/+ 0.256 V, see API
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# documentation for details
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ads1115.setGain(upm.ADS1X15.GAIN_TWO)
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# Set the sample rate to 860 samples per second (max) and turn on continuous
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# sampling
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ads1115.setSPS(upm.ADS1115.SPS_860)
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ads1115.setContinuous(True)
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# Open the output file
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try:
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f = open(fileName, 'w')
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except OSError as e:
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print('Cannot open output file:', e)
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return
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# Setup a timer to stop logging after 10 seconds
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t = Timer(10, stop)
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t.start()
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# Read sensor and write to file every 1 ms
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while running:
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f.write(str(id) + ' %.7f' % ads1115.getLastSample() + '\n')
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id += 1
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sleep(0.001)
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# Close and exit
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f.close()
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print('Wrote', id, 'samples to file:', fileName)
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return
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if __name__ == '__main__':
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main()
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