With version 4.20, STMicroelectronics has pushed TouchGFX further into the territory of "Application Processor UI paradigms on a Cortex-M budget." At first glance, it looks like a standard point release: partial frame buffers, new widgets, and animation easing. But digging into the HAL (Hardware Abstraction Layer) changes reveals a more interesting narrative about where embedded GUI is heading.
This post is written from the perspective of an embedded GUI architect or senior firmware engineer, focusing on the and performance nuances rather than just a feature list. Title: Deconstructing TouchGFX 4.20: The Balance between Abstraction and Bare-Metal Reality touchgfx 4.20