(Carmine Noviello): Highly recommended by the embedded community as the best structured guide to understanding the official ST Hardware Abstraction Layer (HAL). You can find the digital version directly on Leanpub .
(Joseph Yiu): A fantastic companion piece to understand the hardware architecture that powers STM32 chips. Mastering STM32
If you are diving into learning this ecosystem, keep these community-vetted tips in mind: keep these community-vetted tips in mind: