Implement entry point for functional blocks

[CloudyPadmal]

When user turns on PSLab device, we should have two paths for them to move forward

• Normal mode
• Standalone mode

Implement a logical pathway to manage these two path entries depending on requirements.

• Normal mode: UART communication
• Standalone mode: read from SD card and set instruments

[CloudyPadmal]

Now we have a bootloader in PSLab firmware. If users have production ready .HEX files, using Unified Bootloader app, they can upgrade/change the current firmware instantly.

What if: if we have two hex files,

• one for normal mode
• one for standalone mode where it handles SDcard operations and data logging.

Because these two modes are not usually switched between very frequently, I can assume a user might be able to upload the correct firmware hex file using bootloader (which will take 5 seconds).

This will also simplify the firmware architecture.