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logsim

Executables can be downloaded from https://github.com/WeixuanZ/logsim/releases/latest.

This program is also available in Simplified Chinese. If different from your system language, you can launch logsim in Chinese using

LANG=zh_CN.utf8 ./logsim

本程序支持简体中文，如果你的系统语言并不是中文，可用上述指令运行logsim

Logic Description Language

In Extended Backus Naur Form (EBNF)

circuit = devices , connections , [ monitor ] ;
devices = "DEVICES" , ":" , device_definition , { device_definition } ;
connections = "CONNECTIONS" , ":" , connection , { connection } ;
monitor = "MONITORS" , ":" , [ monitor_statement ] ;

device_definition = device_name , { "," , device_name } , "=" , device_type , ";" ;

letter = "A" | "B" | "C" | "D" | "E" | "F" | "G"
       | "H" | "I" | "J" | "K" | "L" | "M" | "N"
       | "O" | "P" | "Q" | "R" | "S" | "T" | "U"
       | "V" | "W" | "X" | "Y" | "Z" | "a" | "b"
       | "c" | "d" | "e" | "f" | "g" | "h" | "i"
       | "j" | "k" | "l" | "m" | "n" | "o" | "p"
       | "q" | "r" | "s" | "t" | "u" | "v" | "w"
       | "x" | "y" | "z" ;
digit_excluding_zero = "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
digit = "0" | digit excluding zero ;

device_name = ( letter | "_" ) , { letter | digit | "_" } ;

device_type = ( "CLOCK", parameter )
            | ( "SWITCH", "<" , ( "0" | "1" ) , ">" )
            | ( ( "AND" | "NAND" | "OR" | "NOR" ), parameter )
            | "NOT"
            | "XOR"
            | "D_TYPE" ;
parameter = "<" , digit , { digit } , ">" ;

connection = pin , "-" , pin , ";" ;
pin = ( in_pin | out_pin ) ;
in_pin = ( device_name , "." , "I" , digit_excluding_zero , [ digit ] )
       | ( device_name , "." , ( "DATA" | "CLK" | "SET" | "CLEAR" ) ) ;
out_pin = device_name | ( device_name , "." , ( "Q" | "QBAR" ) ) ;

monitor_statement = pin , { "," , pin } , ";" ;

Examples are available in tests/.

Development

Install pre-commit using pip and install the hooks using

pre-commit install

This will enable auto-formatting and linting before committing.

Run tests using

make test

Check test coverage using

make coverage

Installing Dependencies

macOS

Create and activate a virtual environment, then use

pip install -r requirements.txt

Linux

There are no pre-built wheels for wxpython on pip. For Ubuntu 20.04, can install the dependencies using

apt-get update && apt-get install --no-install-recommends -y python3.9 python3.9-dev python3-pip python3-opengl python3-wxgtk4.0 freeglut3-dev

Alternatively, can build at pip install

apt update && apt install --no-install-recommends -y make gcc libgtk-3-dev freeglut3 freeglut3-dev
pip install -r requirements.txt

Conda can also be used.

Building Documentation

This project uses Numpy style docstrings, the documentation is built with Sphinx. Each push to master will trigger a build and deploy Action to https://weixuanz.github.io/logsim/.

To build locally, use

make docs

Building Executable

Executables can be built with pyinstaller using

make build

For details of dependencies required for building, please have a look at the build GitHub Action config.