Skip to content
/ drlut Public

Online DSP Lookup Table Generator. (AKA: Sine wave LUT calculator)

License

Notifications You must be signed in to change notification settings

ppelikan/drlut

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

42 Commits
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

Dr LUT - Lookup Table Generator Dr LUT icon

An online tool written in C/C++ that generates waveforms and exports them as arrays.

Online version: https://ppelikan.github.io/drlut

Features:

  • live editing of waveform formula (C/C++ compatible syntax)
  • available waveform presets:
    • zeros, sin, cos, tan, ctan, sawtooth, triangle, square, white noise, gauss, hamming, hann, bartlett, flat top, sigmoid, step
  • available output array formats:
    • signed: int8, int16, int32, float (double)
    • unsigned: uint8, uint16, uint32
  • configurable amplitude and y-axis offset
  • selectable int range behaviour:
    • overflow or saturation
  • selectable array output format:
    • hexadecimal or decimal

Building

Portable version (use this for debuging):

Tool installation:

sudo apt-get install gcc make libglfw3-dev libgles2-mesa-dev
git clone https://github.com/ocornut/imgui.git
git clone https://github.com/epezent/implot.git

Building:

cd drlut
make portable
./build/portable/app_executable

Web WASM Emscripten version (for release deployment):

Tool installation:

sudo apt-get install cmake python3
git clone https://github.com/emscripten-core/emsdk.git
cd emsdk
git pull
./emsdk install latest
./emsdk activate latest

Building:

cd drlut
source 'path_to_your_emscripten_installation/emsdk/emsdk_env.sh'
make web
make serve

Contributing

If you found a bug or have a new feature request, you are welcome to open a new issue. If you want to help, you can also submit your proposed code via pull request. Please note that I might respond with delay.


Known issues, todo:

  • add array size computation in bytes/kbytes/megabytes and widget to display it
  • fix broken comments for formulas containing \n characters (buildLut() function)
  • NaN and INF warning should be shown if detected (before type casting)
  • change generated header files to source files, or to .c&.h pairs
  • add include stdint (or math for float_t)
  • use submodules instead of current solution (ext directory)