M5Stack Faces Integer Calculator

I am Takao Akaki@mongonta555.

Product Infomation

My project is a calculator with a function that can calculate and analyze the entered formulas and automatically accumulate the answers. The history of the calculation formula is memorized up to 99 lines and can be edited later.

This application is designed for M5Stack Faces Calculator Module.

How to Use

• M : Mode Change(Calc Mode⇔Scroll Mode)
• AC : AllClear

（１）Calc mode Enter the formula and press “=” to execute the calculation. The formula and answer are copied to the table area.

• +/- : BackSpace
• % : Clear PromptLine
• = : Execute Calculation

（２）Scroll mode

This mode allows you to scroll the table area. Move to 8, 2, 4, 6, and press 5 to copy the data in the line surrounded by the red line to the prompt and edit it.

• 8 : Up
• 2 : Down
• 4 : Left
• 6 : Right
• 5 : Select Line(Copy data to Prompt Line and Change to Calc Mode)

How to Install

This Application is Designed for M5Stack LovyanLauncher. You can copy Faces_Calc.bin on Github to SD card and launch it from LovyanLauncher.

Library Required for Compile

Faces_Calc uses Tiny Expr to analyze mathematical formulas. Copy tinyexpr.h and tinyexpr.cpp from GitHub to the same folder as Faces_Calc.ino.

※ Set the compilation warning to "None" when compiling.