4 ## This file is part of the sigrok-meter project.
6 ## Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
7 ## Copyright (C) 2014 Jens Steinhauser <jens.steinhauser@gmail.com>
9 ## This program is free software; you can redistribute it and/or modify
10 ## it under the terms of the GNU General Public License as published by
11 ## the Free Software Foundation; either version 2 of the License, or
12 ## (at your option) any later version.
14 ## This program is distributed in the hope that it will be useful,
15 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ## GNU General Public License for more details.
19 ## You should have received a copy of the GNU General Public License
20 ## along with this program; if not, write to the Free Software
21 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28 import sigrok.core as sr
32 default_drivers = [('demo', {'analog_channels': 4})]
33 default_loglevel = sr.LogLevel.WARN
36 parser = argparse.ArgumentParser(
37 description='Simple sigrok GUI for multimeters and dataloggers.',
38 epilog=textwrap.dedent('''\
39 The DRIVER string is the same as for sigrok-cli(1).
43 %(prog)s --driver tecpel-dmm-8061-ser:conn=/dev/ttyUSB0
45 %(prog)s --driver uni-t-ut61e:conn=1a86.e008
47 formatter_class=argparse.RawDescriptionHelpFormatter)
49 parser.add_argument('-d', '--driver',
51 help='The driver to use')
52 parser.add_argument('-l', '--loglevel',
54 help='Set loglevel (5 is most verbose)')
55 parser.add_argument('--pyside',
58 help='Force use of PySide (default is to use PyQt4)')
59 args = parser.parse_args()
62 'drivers': default_drivers,
63 'loglevel': default_loglevel,
68 result['drivers'] = []
70 m = re.match('(?P<name>[^:]+)(?P<opts>(:[^:=]+=[^:=]+)*)', d)
72 sys.exit('error parsing option "{}"'.format(d))
74 opts = m.group('opts').split(':')[1:]
75 opts = [tuple(kv.split('=')) for kv in opts]
78 result['drivers'].append((m.group('name'), opts))
80 if args.loglevel != None:
82 result['loglevel'] = sr.LogLevel.get(args.loglevel)
84 sys.exit('error: invalid log level')
88 if __name__ == '__main__':
89 # The command line parsing and import of the Qt modules is done here,
90 # so that the modules are imported before the classes below derive
91 # from classes therein. The rest of the main function is at the bottom.
96 from PySide import QtCore, QtGui
99 # Use version 2 API in all cases, because that's what PySide uses.
101 sip.setapi('QVariant', 2)
102 sip.setapi('QDate', 2)
103 sip.setapi('QDateTime', 2)
104 sip.setapi('QString', 2)
105 sip.setapi('QTextStream', 2)
106 sip.setapi('QTime', 2)
107 sip.setapi('QUrl', 2)
108 sip.setapi('QVariant', 2)
110 from PyQt4 import QtCore, QtGui
112 # Add PySide compatible names.
113 QtCore.Signal = QtCore.pyqtSignal
114 QtCore.Slot = QtCore.pyqtSlot
116 sys.stderr.write('import of PyQt4 failed, using PySide\n')
117 from PySide import QtCore, QtGui
119 class SamplingThread(QtCore.QObject):
120 '''A class that handles the reception of sigrok packets in the background.'''
122 class Worker(QtCore.QObject):
123 '''Helper class that does the actual work in another thread.'''
125 '''Signal emitted when new data arrived.'''
126 measured = QtCore.Signal(object, object)
128 '''Signal emmited in case of an error.'''
129 error = QtCore.Signal(str)
131 def __init__(self, drivers, loglevel):
132 super(self.__class__, self).__init__()
134 self.sampling = False
135 self.drivers = drivers
137 self.context = sr.Context_create()
138 self.context.log_level = loglevel
140 self.sr_pkg_version = self.context.package_version
141 self.sr_lib_version = self.context.lib_version
144 def start_sampling(self):
146 for name, options in self.drivers:
148 dr = self.context.drivers[name]
149 devices.append(dr.scan(**options)[0])
152 'Unable to get device for driver "{}".'.format(name))
155 self.session = self.context.create_session()
157 self.session.add_device(dev)
159 self.session.add_datafeed_callback(self.callback)
164 # If sampling is 'True' here, it means that 'stop_sampling()' was
165 # not called, therefore 'session.run()' ended too early, indicating
168 self.error.emit('An error occured during the acquisition.')
170 def stop_sampling(self):
172 self.sampling = False
175 def callback(self, device, packet):
176 if packet.type == sr.PacketType.ANALOG:
177 self.measured.emit(device, packet.payload)
179 # wait a short time so that in any case we don't flood the GUI
180 # with new data (for example if the demo device is used)
181 self.thread().msleep(100)
183 # signal used to start the worker across threads
184 _start_signal = QtCore.Signal()
186 def __init__(self, drivers, loglevel):
187 super(self.__class__, self).__init__()
189 self.worker = self.Worker(drivers, loglevel)
190 self.thread = QtCore.QThread()
191 self.worker.moveToThread(self.thread)
193 self._start_signal.connect(self.worker.start_sampling)
195 # expose the signals of the worker
196 self.measured = self.worker.measured
197 self.error = self.worker.error
202 '''Starts sampling'''
203 self._start_signal.emit()
206 '''Stops sampling and the background thread.'''
207 self.worker.stop_sampling()
209 # the timeout is needed when the demo device is used, because it
210 # produces so much outstanding data that quitting takes a long time
211 self.thread.wait(500)
213 def sr_pkg_version(self):
214 '''Returns the version number of the libsigrok package.'''
215 return self.worker.sr_pkg_version
217 def sr_lib_version(self):
218 '''Returns the version number fo the libsigrok library.'''
219 return self.worker.sr_lib_version
221 class MeasurementDataModel(QtGui.QStandardItemModel):
222 '''Model to hold the measured values.'''
224 '''Role used to identify and find the item.'''
225 _idRole = QtCore.Qt.UserRole + 1
227 '''Role used to store the device vendor and model.'''
228 descRole = QtCore.Qt.UserRole + 2
230 def __init__(self, parent):
231 super(self.__class__, self).__init__(parent)
233 # Use the description text to sort the items for now, because the
234 # _idRole holds tuples, and using them to sort doesn't work.
235 self.setSortRole(MeasurementDataModel.descRole)
237 # Used in 'format_mag()' to check against.
238 self.inf = float('inf')
240 def format_unit(self, u):
244 sr.Unit.OHM: u'\u03A9',
247 sr.Unit.CELSIUS: u'\u00B0C',
248 sr.Unit.FAHRENHEIT: u'\u00B0F',
250 sr.Unit.PERCENTAGE: '%',
253 sr.Unit.SIEMENS: 'S',
254 sr.Unit.DECIBEL_MW: 'dBu',
255 sr.Unit.DECIBEL_VOLT: 'dBV',
257 sr.Unit.DECIBEL_SPL: 'dB',
258 # sr.Unit.CONCENTRATION
259 sr.Unit.REVOLUTIONS_PER_MINUTE: 'rpm',
260 sr.Unit.VOLT_AMPERE: 'VA',
262 sr.Unit.WATT_HOUR: 'Wh',
263 sr.Unit.METER_SECOND: 'm/s',
264 sr.Unit.HECTOPASCAL: 'hPa',
265 sr.Unit.HUMIDITY_293K: '%rF',
266 sr.Unit.DEGREE: u'\u00B0',
270 return units.get(u, '')
272 def format_mqflags(self, mqflags):
273 if sr.QuantityFlag.AC in mqflags:
275 elif sr.QuantityFlag.DC in mqflags:
280 def format_mag(self, mag):
283 return '{:f}'.format(mag)
285 def getItem(self, device, channel):
286 '''Returns the item for the device + channel combination from the model,
287 or creates a new item if no existing one matches.'''
289 # unique identifier for the device + channel
290 # TODO: isn't there something better?
294 device.serial_number(),
295 device.connection_id(),
299 # find the correct item in the model
300 for row in range(self.rowCount()):
301 item = self.item(row)
302 rid = item.data(MeasurementDataModel._idRole)
303 rid = tuple(rid) # PySide returns a list
307 # nothing found, create a new item
308 desc = '{} {}, channel "{}"'.format(
309 device.vendor, device.model, channel.name)
311 item = QtGui.QStandardItem()
312 item.setData(uid, MeasurementDataModel._idRole)
313 item.setData(desc, MeasurementDataModel.descRole)
318 @QtCore.Slot(object, object)
319 def update(self, device, payload):
320 '''Updates the data for the device (+channel) with the most recent
321 measurement from the given payload.'''
323 if not len(payload.channels):
326 # TODO: find a device with multiple channels in one packet
327 channel = payload.channels[0]
329 item = self.getItem(device, channel)
331 # the most recent value
332 mag = payload.data[0][-1]
334 unit_str = self.format_unit(payload.unit)
335 mqflags_str = self.format_mqflags(payload.mq_flags)
336 mag_str = self.format_mag(mag)
337 disp = ' '.join([mag_str, unit_str, mqflags_str])
338 item.setData(disp, QtCore.Qt.DisplayRole)
340 class MultimeterDelegate(QtGui.QStyledItemDelegate):
341 '''Delegate to show the data items from a MeasurementDataModel.'''
343 def __init__(self, parent, font):
344 '''Initializes the delegate.
346 :param font: Font used for the description text, the value is drawn
347 with a slightly bigger and bold variant of the font.
350 super(self.__class__, self).__init__(parent)
353 self._bfont = QtGui.QFont(self._nfont)
355 self._bfont.setBold(True)
356 if self._bfont.pixelSize() != -1:
357 self._bfont.setPixelSize(self._bfont.pixelSize() * 1.8)
359 self._bfont.setPointSizeF(self._bfont.pointSizeF() * 1.8)
361 fi = QtGui.QFontInfo(self._nfont)
362 self._nfontheight = fi.pixelSize()
364 fm = QtGui.QFontMetrics(self._bfont)
365 r = fm.boundingRect('-XX.XXXXXX X XX')
366 self._size = QtCore.QSize(r.width() * 1.2, r.height() * 3.5)
368 def sizeHint(self, option=None, index=None):
371 def paint(self, painter, options, index):
372 value = index.data(QtCore.Qt.DisplayRole)
373 desc = index.data(MeasurementDataModel.descRole)
375 # description in the top left corner
376 painter.setFont(self._nfont)
377 p = options.rect.topLeft()
378 p += QtCore.QPoint(self._nfontheight, 2 * self._nfontheight)
379 painter.drawText(p, desc)
381 # value in the center
382 painter.setFont(self._bfont)
383 r = options.rect.adjusted(self._nfontheight, 2.5 * self._nfontheight,
385 painter.drawText(r, QtCore.Qt.AlignCenter, value)
387 class EmptyMessageListView(QtGui.QListView):
388 '''List view that shows a message if the model im empty.'''
390 def __init__(self, message, parent=None):
391 super(self.__class__, self).__init__(parent)
393 self._message = message
395 def paintEvent(self, event):
397 if m and m.rowCount():
398 super(self.__class__, self).paintEvent(event)
401 painter = QtGui.QPainter(self.viewport())
402 painter.drawText(self.rect(), QtCore.Qt.AlignCenter, self._message)
404 class SigrokMeter(QtGui.QMainWindow):
405 '''The main window of the application.'''
407 def __init__(self, thread):
408 super(SigrokMeter, self).__init__()
410 self.delegate = MultimeterDelegate(self, self.font())
411 self.model = MeasurementDataModel(self)
412 self.model.rowsInserted.connect(self.modelRowsInserted)
417 self.thread.measured.connect(self.model.update)
418 self.thread.error.connect(self.error)
422 self.setWindowTitle('sigrok-meter')
423 # resizing the listView below will increase this again
426 p = os.path.abspath(os.path.dirname(__file__))
427 p = os.path.join(p, 'sigrok-logo-notext.png')
428 self.setWindowIcon(QtGui.QIcon(p))
430 actionQuit = QtGui.QAction(self)
431 actionQuit.setText('&Quit')
432 actionQuit.setIcon(QtGui.QIcon.fromTheme('application-exit'))
433 actionQuit.setShortcut('Ctrl+Q')
434 actionQuit.triggered.connect(self.close)
436 actionAbout = QtGui.QAction(self)
437 actionAbout.setText('&About')
438 actionAbout.setIcon(QtGui.QIcon.fromTheme('help-about'))
439 actionAbout.triggered.connect(self.show_about)
441 menubar = self.menuBar()
442 menuFile = menubar.addMenu('&File')
443 menuFile.addAction(actionQuit)
444 menuHelp = menubar.addMenu('&Help')
445 menuHelp.addAction(actionAbout)
447 self.listView = EmptyMessageListView('waiting for data...')
448 self.listView.setFrameShape(QtGui.QFrame.NoFrame)
449 self.listView.viewport().setBackgroundRole(QtGui.QPalette.Window)
450 self.listView.viewport().setAutoFillBackground(True)
451 self.listView.setMinimumWidth(260)
452 self.listView.setSelectionMode(QtGui.QAbstractItemView.NoSelection)
453 self.listView.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
454 self.listView.setVerticalScrollMode(QtGui.QAbstractItemView.ScrollPerPixel)
455 self.listView.setItemDelegate(self.delegate)
456 self.listView.setModel(self.model)
457 self.listView.setUniformItemSizes(True)
458 self.listView.setMinimumSize(self.delegate.sizeHint())
460 self.setCentralWidget(self.listView)
461 self.centralWidget().setContentsMargins(0, 0, 0, 0)
464 def show_about(self):
465 text = textwrap.dedent('''\
467 <b>sigrok-meter</b><br/>
469 Using libsigrok {} (lib version {}).<br/>
470 <a href='http://www.sigrok.org'>
471 http://www.sigrok.org</a><br/>
473 This program comes with ABSOLUTELY NO WARRANTY;<br/>
475 <a href='http://www.gnu.org/licenses/gpl.html'>
476 http://www.gnu.org/licenses/gpl.html</a>
478 '''.format(self.thread.sr_pkg_version(), self.thread.sr_lib_version()))
480 QtGui.QMessageBox.about(self, 'About sigrok-meter', text)
483 def error(self, msg):
484 '''Error handler for the sampling thread.'''
485 QtGui.QMessageBox.critical(self, 'Error', msg)
488 @QtCore.Slot(object, int, int)
489 def modelRowsInserted(self, parent, start, end):
490 '''Resizes the list view to the size of the content.'''
492 rows = self.model.rowCount()
493 dh = self.delegate.sizeHint().height()
494 self.listView.setMinimumHeight(dh * rows)
496 if __name__ == '__main__':
497 thread = SamplingThread(args['drivers'], args['loglevel'])
499 app = QtGui.QApplication([])
500 s = SigrokMeter(thread)