Menu Driver - Overview

Purpose

The menu driver is a page-based UI framework for an embedded display (ILI9341).

It defines:

• how UI is structured into pages
• how state is stored per page
• how navigation works
• how rendering is organized

Architecture Position

[ Application Logic ]        ↓[ Menu Driver ]        ↓[ ILI9341 Driver ]        ↓[ SPI / Hardware ]

It does not:

• own the main loop
• schedule tasks
• interpret input fully

It does:

• define UI structure
• manage page lifecycle
• coordinate rendering

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1.3 Design Model

Everything revolves around:

“A UI is a collection of pages with lifecycle and state.”

Each page has:

• state
• init/update/render/destruct
• parent relationship