Introduction
SimplHDL is a plugin-based command-line application for simplifying FPGA and ASIC development regardless of EDA tools and flows.
The goal is to embrase structured and reusable designs by creating a generic project model that can be used in any hdl development flow regardless of project structure and EDA tool requirements.
The plugin based architecture allows for SimplHDL to be migrated into any existing project, replacing ad-hoc simulation and implementation scripts while providing a intuitive command-line interface for HDL design and verification engineers.
I wide vararity of languages, standards and tools are supported.
HDL languages
- Verilog / System Verilog
- VHDL
- Chisel
- SystemRDL
- IPXact
- Vivado IP containers (.xci, .xcix)
- Quartus IP containers (.ip)
Methodologies
- UVM
- OSVMM
- UVVM
- Cocotb
- pyuvm
EDA Tools
- Vivado
- Quartus
- Modelsim
- Questasim
- Xsim
- Vcs
- Riviera Pro
- Xcelium (coming)
- Verilator (coming)
- Icarus (coming)
- GHDL (coming)
Getting Started
SimplHDL currently works on Linux and Windows WSL. It is written in Python and can be installed with pip. To run SimplHDL Python 3.8 or later is required. The tools for the flows you wish to run also need to be installed and set up correctly in the shell environment. SimplHDL can be installed on your system's Python installation, but it is highly recommended to install and run SimplHDL in a Python virtual environment or a Conda environment.
Example
To quickly try out SimplHDL follow these steps. In this example, we will use Vivado and QuestaSim. The prerequisites are that SimplHDL install installed and Vivado and QuestaSim are correctly set up in your shell environment.
- Clone Git repository from GitHub
git clone https://github.com/SimplHDL/simplhdl.git
- install SimplHDL from source
pip install ./simplhdl
- Run simulation
cd simplhdl/examples/hdl/alu/sim
simpl questasim
- Run simulation interactively in Gui.
cd simplhdl/examples/hdl/alu/sim
simpl questasim --gui
- Run implementation
cd ../syn
simpl vivado
- Run implementation interactively in Gui.
simpl vivado --gui
In this example, the project specification is written in Yaml. This format is only meant as a demonstration. To integrate SimplHDL into your project, you have to write a parser plugin for your specific project specification format. See the documentation and plugin examples for more information.
Links
- Homepage:
- Source: https://github.com/SimplHDL/simplhdl
- Tracker: https://github.com/SimplHDL/simplhdl/issues
Metadata
Release files for simplhdl 0.13.4
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| simplhdl-0.13.4.tar.gz | 77.5 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| simplhdl-0.13.4-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 184.8 kB
Release files / simplhdl-0.13.4.tar.gz
| Download URL | simplhdl-0.13.4.tar.gz |
|---|---|
| Size | 77.5 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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|
BLAKE2b-256 checksum How to use checksums |
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| Upload date | |
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Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
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Provenance
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Signed by GitHub Actions, verified by PyPI on Sep 17, 2026.
Transparency logRelease files / simplhdl-0.13.4-py3-none-any.whl
| Download URL | simplhdl-0.13.4-py3-none-any.whl |
|---|---|
| Size | 107.3 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
18cc7894bf44e463ce02ea2c808b67d96d35e924035cd9f54547659981419588
|
|
BLAKE2b-256 checksum How to use checksums |
59469fd0eb41b4d1c394ee86838f4ba21af7ac3675cd0128a201ee19b50bf409
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Sep 17, 2026.
Transparency log
