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Changelog

v0.8.2 (2023-09-08)

Bugfixes

  • Fine-tuning of Matplotlib font size for different screens, scalings and resolutions

v0.8.1 (2023-09-08)

Bugfixes

  • Correct scaling of 'UI detail' icon for high resolution screens
  • Increase Matplotlib font size for high resolution screens

Improvements

  • Nicer icons for 'UI detail' and 'Grid'

v0.8.0 (2023-08-09)

Bugfixes

  • Several tabs: Various crashes related to file imports
  • 'H(f'): Fix deprecation error w.r.t. matplotlib, causing a crash when using inset plot in the H(f) tab (#234)
  • 'Specs': Fix wrong / erroneous behaviour of 'Lock frequencies' button
  • 'Specs': Sampling frequency, unit and display mode are now exported and imported to /from filters.
  • 'FFT': Replace deprecated Slepian window by DPSS
  • Several tabs: Fixed some strange behaviours and crashes with complex data / plots
  • Several tabs: Fix deprecation error w.r.t. to 'ragged arrays' in numpy which made filter import / export unusable. The format of the npz file had to be changed, so old filter designs can no longer be read with this version.

New features

  • Github action workflows for creating Flatpak installation files, as Github release and on Flathub (thanks to @Martin Marmsoler). This now works for tagged (pre)releases and 'latest' releases from the main branch.

  • 'y[n]': Stimulus can be loaded from wav and csv files, additionally response / quantized response can be saved in those formats.

  • 'y[n]': Plotting can be disabled, as plotting of large data sets takes the most time by far compared to calculating the response.

  • 'y[n]': Frequency input fields are highlighted in red when the value is outside the first Nyquist zone. The value is used anyway but will be aliased.

  • 'y[n]': Improve overall UI

  • 'y[n]': Show interpolated waveform x(t) for discrete time stimuli (mainly for didactic purposes)

  • 'y[n]: Periodic sinc is now correctly called 'diric' and properly defined.

  • 'H(f)': Allow plotting magnitude, real and imaginary part of H(F) at the same time

  • 'H(f)': Add legend

  • Make the display of polar coordinates in the P/Z input tab more compact

  • 'Specs': Frequency input fields are highlighted in red when the value is outside the first Nyquist zone. The value is passed to filter design routines anyway where it usually raises an error.

  • All tabs: Allow hiding the control options for maximum plotting area via a new button in the toolbar

  • All tabs: Lots of little UI and tooltip improvements

v0.7.1 (2022-10-05)

Bugfixes

  • Fix crash in 'y[n]' tab when no file is loaded
  • Remove some superfluous files in pip package

v0.7 (2022-10-04)

Bugfixes

  • Fix lot of bugs and redundancies in the fixpoint simulation routines
  • When the filter is complex-valued, set data type to 'complex' for the response signal in y[n] (was 'float' so only the real part was displayed)
  • Fix crash when entering a complex coefficient in a previously real-valued filter
  • Default file filters for QFileDialog objects could not be set in some cases, producing warning messages in the console
  • Remove module import and version display for module nmigen to avoid message "KeyError: 'V_NMG'"

New features

  • Show number of pos. and neg. overflows in quantizers
  • Implement IIR DF1 fixpoint filter
  • Export SOS filter coefficients in CMSIS DSP format (via the CSV export options in the coefficient tab)
  • New stimulus Randint process
  • Add sequence length parameter to MLS process, remove PRBS (which was a Randint process with values 0 and 1)

Maintenance

  • move CSV_option_box to separate module 'csv_option_box.py'

v0.6.1 (2022-03-28)

Bugfixes

  • Fix crash with matplotlib 3.1 due to missing Axes3D import
  • Fix crash with scipy 1.8.0 by providing local copy of validate_sos() (#214)

New features

  • Keyboard modifier <ALT> hides the plot title when saving a figure or copying it to the clipboard
  • Add new stimulus "PWM"
  • Verified functionality with Python 3.10

v0.6.0 (2021-12-23)

Bug fixes

  • Recalculate frequency specs in 'k' in the y[n] widget when self.N has been changed

  • Renamed file iir_df1.py to iir_df1.py_bak to prevent it from being analyzed by python setup.py install. The myhdl keyword async creates an error with python 3.7 and up.

  • Update frequency specs when the frequency unit has been changed (regression)

  • Angles now can be entered in the Input P/Z tab by preceding "<" instead of the angle character

  • It is now possible to set the filter type ('FIR' or 'IIR') in the Coeffs tab. Changing the filter type now highlights the save button.

  • Complex flag is reset in fixpoint simulation when switching back from complex to real stimuli

  • Improved legend in the y[n] / Y(f) tab (markers were missing, tab alignment didn't work)

  • Improve group delay algorithms for IIR, allow selection between algorithms. Equalize length of f and tau_g in differentiation algorithm (selecting 'Diff' crashed pyfda for dual sided spectra)

New features accessible from the UI

  • Improved FFT window widget for displaying the window in time and frequency domain, it can be invoked from the y[n] tab and the Firwin filter design subwidget with much improved selection of window function for spectral analysis (y[n] tab) and Firwin filter design

    • Window function can be changed from combo boxes in the main widget and in the FFT widget
    • improved tooltipps
    • optional combobox for window parameters (used e.g. for Blackmanharris window)

  • Lots of improvements in y[n] tab:

    • UI overhaul

    • Simulation is now frame based simulation to interrupt simulation of long sequences and audio I/O in the future. Progress bar works, though.

    • Add widgets T1 and T2 for time and TW1 and TW2 for delays in y[n] and use them for impulse shaped stimuli

    • New stimuli 'Gauss' and 'Rect impulse'

    • New stimulus 'Exp' (complex exponentials)

    • New noise types "Maximum Length Sequence" and "Brownian"

    • Tooltips for combo box items

    • Replace check boxes by checkable push bottons for a cleaner UI

    • Group stimuli for a better overview

    • Display magnitude and phase in frequency tab

  • Allow turning off automatic grid alignment between mag. and phase in the H(f) tab

  • Allow changing the number of FFT data points via Info -> Settings

  • Plots can be copied to the clipboard in base64 encoded PNG format for easier embedding in e.g. HTML pages or Jupyter Noteboks. The <img> tag can be included as well. This is controlled with the modifiers <SHIFT> or <CTRL>.

  • New overlays 'Contours' and 'Filled Contours' for P/Z Plots

Code maintenance

  • Complete make-over of signalling for DRY using new method 'pyfda_qt_lib.emit()' to generate default dict keys 'id' and 'class' and providing an time-to-live mechanisms for signals

  • Fixpoint and floating point simulation is now frame based; in a future version this will allow to stop long running simulation and / or update the plot during simulation. Restructured and simplified fixpoint simulation flow.

  • Started using pyfixp for fixpoint simulations. nMigen / Amaranth interfaces are still implemented but filter is not enabled by default as frame based simulations are not implemented.

  • Fixpoint filters now live in their own subdirectories together with graphics and other related files.

  • Try to detect YOSYS executable and store path and version in dirs.YOSYS_EXE and dirs.YOSYS_VER

  • Started preparation of code for i18n

  • Renamed subdirectory "filter_designs" to "filter_widgets" for consistency with other widgets and updated required config file version from 3 to 4

  • Provide a simple IIR allpass design as an template for a simple filter widget

  • New command options when starting pyfda: -h for help, -i for infos on paths and files and -r for replacing the config files with copies of the templates

v0.5.3 (2020-12-08)

(There is no release v0.5.2)

Bug fixes

  • Use f_C widgets in elliptic manual filter design (entered values had not been used for the filter design)

New features

  • Added widget duty cycle for the rect pulse, enabling and disabling of widgets is now structured much cleaner

  • Absolute frequencies can be locked now, i.e. normalized frequencies change with the sampling frequency, absolute frequencies remain unchanged

v0.5.1 (2020-12-01)

Bug fixes

  • Stimulus FM modulation had a false definition. For sinusoidal modulation, it is identical to PM modulation. FM modulation is deleted, PM modulation is renamed to "PM / FM".

  • Various scaling errors for new frequency unit "k" have been fixed

  • Wrong time scaling for frequency unit "f_Ny"

  • Corrected calculation and display of single-sided spectra and H_id

New features

  • Added stimulus "sinc"

  • Added warning indicator for complex valued time signals where display of single-sided and H_id spectra may be wrong

v0.5.0 (2020-11-17)

New features

  • Added spectrogram view in the time tab of the transient response widget

  • Minor grid lines have been added, grid mode can be cycled through off / coarse (former grid mode) / fine (with minor grid)

  • Added links to corresponding documentation page on ReadTheDocs for plot widgets. Doc pages need to be updated though ...

  • Overhauled plotting of spectra in the y[n] tab

  • Cleaned up the UI of the y[n] tab

  • Real and imaginary parts of spectra in the y[n] tab now can be plotted

Bug fixes

  • Add fallback mode (cm fonts) again for matplotlib that had been removed due to matplotlib 3.3 incompatibilities. Fallback mode now supports both mechanisms of mpl 3.3 and older versions.

  • Fix error with complex-valued entries in newly created row in input_coeffs widget (ID: 26ba25f4f947)

  • Complex stimuli are now plotted as real and imaginary parts just like the response (a.o. ID: 5b20228c93a98a8c601b8ef172f0162dc97d52c1)

  • Fix scaling for spectra of complex-valued time signals (ID:8664401933c7b8e5e3137a1d255d0b6f2494450f)

  • Allow for complex amplitudes in the impz UI (ID 8664401933c7b8e5e3137a1d255d0b6f2494450f)

  • Fix missing taskbar icon under Windows (ID: fe60993a1c1e6ae9c2b6f2b9433ee8e94e55c7d5)

  • Lots of small fixes

v0.4.0 (2020-10-19)

New features

  • PR #183: Include license information for distribution of pyFDA as source code and in bundled form, redesign the whole "About" window, add CHANGELOG.md (this file) and move attributions to AUTHORS.md

  • Add cursor / annotations in plots (Issue #112) This is only available when mplcursors module is installed and for matplotlib >= 3.1.

  • PR #183: Replace simpleeval library by numexpr. This enables the creation of formula based stimuli, closing Issue #162 and part of Issue #44.

  • Add chirp stimulus in Impulse Response tab.

  • The top level module name for generated Verilog netlists (Fixpoint tab) is now derived from the specified file name. The module name is converted to lower cased and sanitized so that is only contains alpha-numeric characters and '_'. (Issue #176), "allow different module names for verilog export").

  • User and user log config files now can be replaced automatically if the config file version number is wrong (Issue #44)

  • Comment out filter ellip_zero in configuration template as it is too special for general usage. If needed, it can be commented back in the user config file.

  • Eliminate tab Files, its three buttons have been moved to the Specs and the Info tab

Bug fixes

  • Make compatible to matplotlib 3.3 by cleaning up hierarchy for NavigationToolbar in mpl_widgets.py (Issue #179, Issue #44) and get rid of mpl 3.3 related deprecation warnings. Disable zoom rectangle and pan when zoom is locked.

  • PR #182: Get rid of deprecation warnings "Creating an ndarray from ragged nested sequences" (Issue #180) by declaring explicitly np.array(some_ragged_list , dtype=object) or by handling the elements of ragged list indidually (chipmuenk)

  • PR #186, fixing Issue #184 "Filter type "Delay" can crash pyfda", syntax errors in the UI description have been fixed. As the filter class does not produce a proper delay, it is commented out in the configuratiion file for the time being (see Issue #184)

  • When the gain k has been changed in the P/Z input widget, highlight the save button.

  • Fix several small bugs and deprecation warnings in the Coeff input widget

  • Enforce correct sign for various input fields

v0.3 (2020-05)

New Features

  • display pop-up window for showing time and frequency properties of FFT windows for filter design and spectral analysis of transient signals.
  • overlay ideal frequency response in impulse response window and scale it with the number of FFT points for impulse responses. This allows a direct comparison of the fixpoint frequency response (calculated from the transient response) and the ideal response (calculated from the filter coefficients).
  • improve parameter entry and tooltipps for windowed FIR filter design
  • add more windows and use same widget for filter design and spectral analysis
  • new AM, FM, PM stimuli for transient response
  • first successful generation of a binary for Windows using pyinstall. "spec" - files are included for own experiments

Bug Fixes

  • only install PyQt5 when it cannot be imported to prevent double installation under conda.
  • don't try to import PyQt4 (pyfda isn't compatible anymore) as this gives strange error messages on some systems
  • stop installation when matplotlib version 3.1.0 is detected as it isn't compatible
  • fix crash with matplotlib version 3.2.1 due resulting from changed colormap list
  • fix crash when selecting Fixponpoint Tab for a filter design without fixpoint widget
  • fix error when trying to load *.npz files: numpy.load() requires allow_pickle = True since version 1.16.3 for security reasons
  • fix error when trying to load pickled files [ ERROR] [pyfda.input_widgets.input_files:187] Unexpected error: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
  • fixed buggy export of coefficients in Xilinx and Microsemi format
  • Changing the CSV option box parameters from 'file' to 'clipboard' or the other way round in input_coeffs or input_pz would not update the other tab
  • improve robustness when importing csv Files (still room for improvements)
  • suppress "divide by zero in log10" warnings
  • reduce number of debug logging messages, especially from matplotlib
  • eliminate false logging warnings and errors
  • refactor common libraries, all libraries now are within the folder "libs"
  • simplify clipboard instantiation
  • improve robustness by enforcing inputs <> 0 ('poszero', 'negzero') in input fields
  • rename pole/residue export format suffix to *.txt_rpk

Release 0.2 (2019-05)

New features

  • Rework of signal-slot connections

    • Clearer structure: only one RX / TX signal connection per widget
    • More flexibility: transport dicts or lists via the signals
    • Much improved modularity - new functionality can be easily added

  • Reorganization of configuration files

    • Specify module names instead of class names for widgets, class names are defined in the modules
    • More flexibility in defining user directories
    • List suitable fixpoint implementations for each filter design as well as the other way around

  • HDL synthesis (beta status, expect bugs)

    • Use migen to generate synthesizable Verilog netlists for basic filter topologies and do fixpoint simulation
    • When migen is missing on your system, pyFDA will start without the fixpoint tab but otherwise fully functional

  • Didactic improvements

    • Improved display of transient response and FFT of transient response
    • Display magnitude frequency response in the PZ plot to ease understanding the relationship

  • Documentation using Sphinx / ReadTheDocs

    Could be more and better ... but hey, it's a start!

Release 0.1 (2018-02-04)

Initial release