From: W. Trevor King Date: Mon, 14 Jun 2010 13:56:38 +0000 (-0400) Subject: Updated JPK driver for JPK's version 0.5 format and new driver architecture X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=3b1055628b5ffabafba71774d7688e6e2a54085a;p=hooke.git Updated JPK driver for JPK's version 0.5 format and new driver architecture --- diff --git a/hooke/driver/__init__.py b/hooke/driver/__init__.py index b1ba57f..15c05c1 100644 --- a/hooke/driver/__init__.py +++ b/hooke/driver/__init__.py @@ -32,7 +32,7 @@ DRIVER_MODULES = [ # ('csvdriver', True), # ('hdf5', True), # ('hemingclamp', True), -# ('jpk', True), + ('jpk', True), # ('mcs', True), # ('mfp1dexport', True), ('mfp3d', True), diff --git a/hooke/driver/jpk.py b/hooke/driver/jpk.py index 6f519ef..9cc82dd 100644 --- a/hooke/driver/jpk.py +++ b/hooke/driver/jpk.py @@ -17,140 +17,244 @@ # License along with Hooke. If not, see # . -import string -from .. import curve as lhc - -class DataChunk(list): - #Dummy class to provide ext and ret methods to the data list. - - def ext(self): - halflen=(len(self)/2) - return self[0:halflen] - - def ret(self): - halflen=(len(self)/2) - return self[halflen:] - -class jpkDriver(lhc.Driver): - - def __init__(self, filename): - self.filename=filename #self.filename can always be useful, and should be defined - self.filedata = open(filename,'r') #We open the file - self.filelines=self.filedata.readlines() - self.filedata.close() - '''These are two strings that can be used by Hooke commands/plugins to understand what they are looking at. They have no other - meaning. They have to be somehow defined however - commands often look for those variables. - - self.filetype should contain the name of the exact filetype defined by the driver (so that filetype-specific commands can know - if they're dealing with the correct filetype) - self.experiment should contain instead the type of data involved (for example, various drivers can be used for force-clamp experiments, - but hooke commands could like to know if we're looking at force clamp data, regardless of their origin, and not other - kinds of data) - - Of course, all other variables you like can be defined in the class. - ''' - self.filetype = 'jpk' - self.experiment = 'smfs' - - - - def __del__(self): - self.filedata.close() - - def is_me(self): - ''' - we define our magic heuristic for jpk files - ''' - myfile=file(self.filename) - headerlines=myfile.readlines()[0:3] - myfile.close() - if headerlines[0][0:11]=='# xPosition' and headerlines[1][0:11]=='# yPosition': - return True +"""Driver for JPK ForceRobot's velocity clamp data format. +""" + +import logging +import os.path +import pprint +import zipfile + +import numpy + +from .. import curve as curve +from .. import experiment as experiment +from . import Driver as Driver + + +class JPKDriver (Driver): + """Handle JPK ForceRobot's data format. + """ + def __init__(self): + super(JPKDriver, self).__init__(name='jpk') + + def is_me(self, path): + if zipfile.is_zipfile(path): # JPK file versions since at least 0.5 + f = h = None + try: + f = zipfile.ZipFile(path, 'r') + if 'header.properties' not in f.namelist(): + return False + h = f.open('header.properties') + if 'jpk-data-file' in h.read(): + return True + finally: + if h != None: + h.close() + if f != None: + f.close() else: - return False - - def close_all(self): - self.filedata.close() - - def _read_data_segment(self): - #routine that actually reads the data - - height_ms=[] - height_m=[] - height=[] - v_deflection=[] - h_deflection=[] - - self.springconstant=0 #if we don't meet any spring constant, use deflection... - - for line in self.filelines: - #we meet the segment defining the order of data columns - - if line[0:9]=='# columns': - splitline=line.split()[2:] - height_ms_index=splitline.index('smoothedStrainGaugeHeight') - height_m_index=splitline.index('strainGaugeHeight') - height_index=splitline.index('height') - v_deflection_index=splitline.index('vDeflection') - #h_deflection=splitline.index('hDeflection') - - if line[0:16]=='# springConstant': - self.springconstant=float(line.split()[2]) - - if line[0] != '#' and len(line.split())>1: - dataline=line.split() - height_ms.append(float(dataline[height_ms_index])) - height_m.append(float(dataline[height_m_index])) - height.append(float(dataline[height_index])) - v_deflection.append(float(dataline[v_deflection_index])) - #h_deflection.append(float(dataline[h_deflection_index])) - - if self.springconstant != 0: - force=[item*self.springconstant for item in v_deflection] - else: #we have measured no spring constant :( - force=v_deflection - - height_ms=DataChunk([item*-1 for item in height_ms]) - height_m=DataChunk([item*-1 for item in height_m]) - height=DataChunk([item*-1 for item in height]) - deflection=DataChunk(v_deflection) - force=DataChunk(force) - - return height_ms,height_m,height,deflection,force - - def deflection(self): - height_ms,height_m,height,deflection,force=self._read_data_segment() - deflection_ext=deflection.ext() - deflection_ret=deflection.ret() - deflection_ret.reverse() - return deflection_ext,deflection_ret - - def default_plots(self): - - height_ms,height_m,height,deflection,force=self._read_data_segment() - - height_ms_ext=height_ms.ext() - height_ms_ret=height_ms.ret() - force_ext=force.ext() - force_ret=force.ret() - #reverse the return data, to make it coherent with hooke standard - height_ms_ret.reverse() - force_ret.reverse() - - main_plot=lhc.PlotObject() - main_plot.add_set(height_ms_ext,force_ext) - main_plot.add_set(height_ms_ret,force_ret) - - - - if self.springconstant != 0: - main_plot.units=['meters','force'] + f = None + try: + f = open(path, 'r') + headlines = [] + for i in range(3): + headlines.append(f.readline()) + if headlines[0].startswith('# xPosition') \ + and headlines[1].startswith('# yPosition'): + return True + finally: + if f != None: + f.close() + return False + + def read(self, path): + if zipfile.is_zipfile(path): # JPK file versions since at least 0.5 + return self._read_zip(path) else: - main_plot.units=['meters','meters'] - - main_plot.normalize_vectors() - - main_plot.destination=0 - main_plot.title=self.filename - - return [main_plot] + return self._read_old(path) + + def _read_zip(self, path): + f = None + try: + f = zipfile.ZipFile(path, 'r') + f.path = path + info = self._zip_info(f) + approach = self._zip_segment(f, info, 0) + retract = self._zip_segment(f, info, 1) + assert approach.info['name'] == 'approach', approach.info['name'] + assert retract.info['name'] == 'retract', retract.info['name'] + return ([approach, retract], + self._zip_translate_params(info, retract.info['raw info'])) + finally: + if f != None: + f.close() + + def _zip_info(self, zipfile): + h = None + try: + h = zipfile.open('header.properties') + info = self._parse_params(h.readlines()) + return info + finally: + if h != None: + h.close() + + def _zip_segment(self, zipfile, info, index): + prop_file = zipfile.open(os.path.join( + 'segments', str(index), 'segment-header.properties')) + prop = self._parse_params(prop_file.readlines()) + prop_file.close() + expected_shape = (int(prop['force-segment-header']['num-points']),) + channels = [] + for chan in prop['channels']['list']: + chan_info = prop['channel'][chan] + channels.append(self._zip_channel(zipfile, index, chan, chan_info)) + if channels[-1].shape != expected_shape: + raise NotImplementedError( + 'Channel %d:%s in %s has strange shape %s != %s' + % (index, chan, zipfile.path, + channels[-1].shape, expected_shape)) + d = curve.Data( + shape=(len(channels[0]), len(channels)), + dtype=channels[0].dtype, + info=self._zip_translate_segment_params(prop)) + for i,chan in enumerate(channels): + d[:,i] = chan + return self._zip_scale_segment(d) + + def _zip_channel(self, zipfile, segment_index, channel_name, chan_info): + f = zipfile.open(os.path.join( + 'segments', str(segment_index), + chan_info['data']['file']['name']), 'r') + assert chan_info['data']['file']['format'] == 'raw', \ + 'Non-raw data format:\n%s' % pprint.pformat(chan_info) + assert chan_info['data']['type'] == 'float-data', \ + 'Non-float data format:\n%s' % pprint.pformat(chan_info) + data = numpy.frombuffer( + buffer(f.read()), + dtype=numpy.dtype(numpy.float32).newbyteorder('>'), + # Is JPK data always big endian? I can't find a config + # setting. The ForceRobot brochure + # http://www.jpk.com/forcerobot300-1.download.6d694150f14773dc76bc0c3a8a6dd0e8.pdf + # lists a PowerPC chip on page 4, under Control + # electronics, and PPCs are usually big endian. + # http://en.wikipedia.org/wiki/PowerPC#Endian_modes + ) + f.close() + return data + + def _zip_translate_params(self, params, chan_info): + info = { + 'raw info':params, + #'time':self._time_from_TODO(raw_info[]), + } + force_unit = chan_info['channel']['vDeflection']['conversion-set']['conversion']['force']['scaling']['unit']['unit'] + assert force_unit == 'N', force_unit + force_base = chan_info['channel']['vDeflection']['conversion-set']['conversion']['force']['base-calibration-slot'] + assert force_base == 'distance', force_base + dist_unit = chan_info['channel']['vDeflection']['conversion-set']['conversion']['distance']['scaling']['unit']['unit'] + assert dist_unit == 'm', dist_unit + force_mult = float( + chan_info['channel']['vDeflection']['conversion-set']['conversion']['force']['scaling']['multiplier']) + info['spring constant (N/m)'] = force_mult + return info + + def _zip_translate_segment_params(self, params): + info = { + 'raw info':params, + 'columns':list(params['channels']['list']), + 'name':params['force-segment-header']['name']['name'], + } + if info['name'] == 'extend-spm': + info['name'] = 'approach' + elif info['name'] == 'retract-spm': + info['name'] = 'retract' + else: + raise NotImplementedError( + 'Unrecognized segment type %s' % info['name']) + return info + + def _zip_scale_segment(self, segment): + data = curve.Data( + shape=segment.shape, + dtype=segment.dtype, + info={}) + data[:,:] = segment + segment.info['raw data'] = data + + # raw column indices + channels = segment.info['raw info']['channels']['list'] + z_col = channels.index('height') + d_col = channels.index('vDeflection') + + segment = self._zip_scale_channel(segment, z_col, 'calibrated') + segment = self._zip_scale_channel(segment, d_col, 'distance') + + assert segment.info['columns'][z_col] == 'height (m)', \ + segment.info['columns'][z_col] + assert segment.info['columns'][d_col] == 'vDeflection (m)', \ + segment.info['columns'][d_col] + + # scaled column indices same as raw column indices, + # because columns is a copy of channels.list + segment.info['columns'][z_col] = 'z piezo (m)' + segment.info['columns'][d_col] = 'deflection (m)' + return segment + + def _zip_scale_channel(self, segment, channel, conversion): + channel_name = segment.info['raw info']['channels']['list'][channel] + conversion_set = segment.info['raw info']['channel'][channel_name]['conversion-set'] + conversion_info = conversion_set['conversion'][conversion] + if conversion_info['base-calibration-slot'] \ + != conversion_set['conversions']['base']: + # Our conversion is stacked on a previous conversion. Do + # the previous conversion first. + segment = self._zip_scale_channel( + segment, channel, conversion_info['base-calibration-slot']) + if conversion_info['type'] == 'file': + if os.path.exists(conversion_info['file']): + raise NotImplementedError('No calibration files were available for testing') + else: + log = logging.getLogger('hooke') + log.warn( + 'Skipping %s -> %s calibration for %s channel. Calibration file %s not found' + % (conversion_info['base-calibration-slot'], + conversion, channel_name, conversion_info['file'])) + else: + assert conversion_info['type'] == 'simple', conversion_info['type'] + assert conversion_info['scaling']['type'] == 'linear', \ + conversion_info['scaling']['type'] + assert conversion_info['scaling']['style'] == 'offsetmultiplier', \ + conversion_info['scaling']['style'] + multiplier = float(conversion_info['scaling']['multiplier']) + offset = float(conversion_info['scaling']['offset']) + unit = conversion_info['scaling']['unit']['unit'] + segment[:,channel] = segment[:,channel] * multiplier + offset + segment.info['columns'][channel] = '%s (%s)' % (channel_name, unit) + return segment + + def _parse_params(self, lines): + info = {} + for line in lines: + line = line.strip() + if line.startswith('#'): + continue + else: + # e.g.: force-segment-header.type=xy-position-segment-header + fields = line.split('=', 1) + assert len(fields) == 2, line + setting = fields[0].split('.') + sub_info = info # drill down, e.g. info['force-s..']['type'] + for s in setting[:-1]: + if s not in sub_info: + sub_info[s] = {} + sub_info = sub_info[s] + if setting[-1] == 'list': # split a space-delimited list + sub_info[setting[-1]] = fields[1].split(' ') + else: + sub_info[setting[-1]] = fields[1] + return info + + def _read_old(self, path): + raise NotImplementedError('No old-style JPK files were available for testing, please send us yours: %s' % path) diff --git a/test/jpk_driver.py b/test/jpk_driver.py new file mode 100644 index 0000000..d3b80b6 --- /dev/null +++ b/test/jpk_driver.py @@ -0,0 +1,40 @@ +# Copyright (C) 2010 W. Trevor King +# +# This file is part of Hooke. +# +# Hooke is free software: you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation, either +# version 3 of the License, or (at your option) any later version. +# +# Hooke is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with Hooke. If not, see +# . + +""" +>>> import os.path +>>> from hooke.hooke import Hooke, HookeRunner +>>> h = Hooke() +>>> r = HookeRunner() +>>> playlist = os.path.join('test', 'data', 'vclamp_jpk', 'playlist') +>>> h = r.run_lines(h, ['load_playlist ' + playlist]) # doctest: +ELLIPSIS + +Success + +>>> h = r.run_lines(h, ['curve_info']) # doctest: +ELLIPSIS, +REPORT_UDIFF +name: 2009.04.23-15.15.47.jpk +path: test/data/vclamp_jpk/2009.04.23-15.15.47.jpk +experiment: None +driver: +filetype: None +note: +blocks: 2 +block sizes: [(4096, 6), (4096, 4)] +Success + +"""