Technical Dilemmas in Embedded UI Development: From Requirements to Bottlenecks [Essential for Embedded UI Development] In the development of IoT, industrial control, and portable smart devices, how to build efficient graphical UIs in no-std, OS-less environments? Traditional terminal UI libraries are limited by resource constraints and hardware compatibility, becoming a major development pain point. This…

This article details the “interrupt service routine variable not updating” issue in embedded ARM development, which stems from compiler optimization and missing volatile modifiers. It uses examples to explain errors caused by compiler “redundant load elimination”, illustrates how the volatile keyword prohibits register caching and maintains instruction order, and compares optimization differences at the ARM…