Pressing shift or alpha during Python program execution will make the calculator slowing down

[yannis300307]

Describe the bug

When we press shift or alpha during the execution of a Python program, the calculator will slow down.

Screenshots

https://github.com/numworks/epsilon/assets/52321382/58e402bb-61fb-461a-930d-9173e2eaffa1

To Reproduce

Steps to reproduce the behavior:

1. Go to the 'Python' app
2. Start a program wich takes a long time to perform like 'mandelbrot'
3. Press 'shift' or 'alpha' during the execution
4. See error

Expected behavior

I don't really know why this bug is happening.

Environment

• Epsilon version : 20.4.0
• The platform(s) on which the problem happens: actual device

[EmilieNumworks]

This is a consequence of our keyboard matrix design. When you press shift or alpha, we cannot rely anymore on hardware interruptions on the corresponding column pins to detect new key events. This forces us to scan regularly the keyboard slowing down the whole run loop.

[EmilieNumworks]

Duplicate of #1971