Proper Scientific Calculator

.

Introduction

This is an attempt to create a better, well documented, well designed open source mathematical expression parser and a scientific calculator.

There are very nice projects out there, but what we're trying to do here is to create a embedded framework of libraries to be used in embedded systems where size is important.

This math engine (we will call it euler from now on) we implemented in this project is capable of doing basic arithmetic to very complex matrices and calculus operations. But since it is planned to put it in a microcontroller its not as powerful as wolfram's products or GNU Octave or Matlab etc. This project aims to make the most powerful math parser that can be fitted in a main stream microcontroller, such as STM32 MCUs.

Euler is designed to be standalone, portable, simple but yet powerful. It can run on anything that has an FPU (a version without FPU coming soon).

Euler uses re2c lexer and lemon parser generator for parsing, and implements some of GNU Scientific Library code. It uses C language and as long as it lasts it will continue to use C (nerd alert!)

Features

• Basic Arithmetic (+, -, *, /, ^, !, %)
• Boolean Arithmetic (&, |, ~, (+))
• Binary Relations (<, >, &&, ||, ==)
• Builtin Constants (e, pi, ...)
• User defined functions
• Builtin functions (cos, sin, tan, sum, prod, ...)
• Differentiation and Integration (Numerical and symbolic)
• Algebraic Simplification

Currently Supported Platforms

• Linux
• STM32F746NG

But one can easily implement their own architecture. For more details please refer to the Wiki Page.

Getting Started on Linux

To see the capabilities, euler can be run on most of the linux distributions with a simple make command.

First clone the repo to your machine.

  git clone https://github.com/arifbalik/proper_calculator.git

Then enter the directory and call make as follows;

  cd proper_calculator
  make clean && make ARCH=linux && ./build/linux

After this command, euler welcome message will show up and program will wait for an input.

Syntax of euler and more on building and implementing a custom project can be found on the Wiki Page.

Contributors

• Arif Balik