util.py

   1 ##
   2 ## This file is part of the sigrok-meter project.
   3 ##
   4 ## Copyright (C) 2015 Jens Steinhauser <jens.steinhauser@gmail.com>
   5 ##
   6 ## This program is free software; you can redistribute it and/or modify
   7 ## it under the terms of the GNU General Public License as published by
   8 ## the Free Software Foundation; either version 2 of the License, or
   9 ## (at your option) any later version.
  10 ##
  11 ## This program is distributed in the hope that it will be useful,
  12 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 ## GNU General Public License for more details.
  15 ##
  16 ## You should have received a copy of the GNU General Public License
  17 ## along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 ##
  19
  20 import sigrok.core as sr
  21
  22 def format_unit(u):
  23     units = {
  24         sr.Unit.VOLT:                   'V',
  25         sr.Unit.AMPERE:                 'A',
  26         sr.Unit.OHM:                   u'\u03A9',
  27         sr.Unit.FARAD:                  'F',
  28         sr.Unit.KELVIN:                 'K',
  29         sr.Unit.CELSIUS:               u'\u00B0C',
  30         sr.Unit.FAHRENHEIT:            u'\u00B0F',
  31         sr.Unit.HERTZ:                  'Hz',
  32         sr.Unit.PERCENTAGE:             '%',
  33       # sr.Unit.BOOLEAN
  34         sr.Unit.SECOND:                 's',
  35         sr.Unit.SIEMENS:                'S',
  36         sr.Unit.DECIBEL_MW:             'dBm',
  37         sr.Unit.DECIBEL_VOLT:           'dBV',
  38       # sr.Unit.UNITLESS
  39         sr.Unit.DECIBEL_SPL:            'dB',
  40       # sr.Unit.CONCENTRATION
  41         sr.Unit.REVOLUTIONS_PER_MINUTE: 'rpm',
  42         sr.Unit.VOLT_AMPERE:            'VA',
  43         sr.Unit.WATT:                   'W',
  44         sr.Unit.WATT_HOUR:              'Wh',
  45         sr.Unit.METER_SECOND:           'm/s',
  46         sr.Unit.HECTOPASCAL:            'hPa',
  47         sr.Unit.HUMIDITY_293K:          '%rF',
  48         sr.Unit.DEGREE:                u'\u00B0',
  49         sr.Unit.HENRY:                  'H'
  50     }
  51
  52     return units.get(u, '')
  53
  54 def quantity_from_unit(u):
  55     quantities = {
  56         sr.Unit.VOLT:                   'Voltage',
  57         sr.Unit.AMPERE:                 'Current',
  58         sr.Unit.OHM:                    'Resistance',
  59         sr.Unit.FARAD:                  'Capacity',
  60         sr.Unit.KELVIN:                 'Temperature',
  61         sr.Unit.CELSIUS:                'Temperature',
  62         sr.Unit.FAHRENHEIT:             'Temperature',
  63         sr.Unit.HERTZ:                  'Frequency',
  64         sr.Unit.PERCENTAGE:             'Duty Cycle',
  65         sr.Unit.BOOLEAN:                'Continuity',
  66         sr.Unit.SECOND:                 'Time',
  67         sr.Unit.SIEMENS:                'Conductance',
  68         sr.Unit.DECIBEL_MW:             'Power Ratio',
  69         sr.Unit.DECIBEL_VOLT:           'Voltage Ratio',
  70         sr.Unit.UNITLESS:               'Unitless Quantity',
  71         sr.Unit.DECIBEL_SPL:            'Sound Pressure',
  72         sr.Unit.CONCENTRATION:          'Concentration',
  73         sr.Unit.REVOLUTIONS_PER_MINUTE: 'Revolutions',
  74         sr.Unit.VOLT_AMPERE:            'Apparent Power',
  75         sr.Unit.WATT:                   'Power',
  76         sr.Unit.WATT_HOUR:              'Energy',
  77         sr.Unit.METER_SECOND:           'Velocity',
  78         sr.Unit.HECTOPASCAL:            'Pressure',
  79         sr.Unit.HUMIDITY_293K:          'Humidity',
  80         sr.Unit.DEGREE:                 'Angle',
  81         sr.Unit.HENRY:                  'Inductance'
  82     }
  83
  84     return quantities.get(u, '')