A nostalgic narrative explains how low‑level hardware control led to the invention of system calls, kernel/user modes, and ultimately the operating system concept, illustrating the transition from direct hardware manipulation to abstracted library functions.
This article dissects Android's NFC implementation, detailing the layered architecture from the high‑level app down to the kernel driver, explaining each source‑code component, the initialization sequence, and how events travel through JNI, HAL, and the transport‑mapping layer to enable NFC functionality.
This comprehensive guide explores the fundamentals of embedded real‑time operating systems, covering instruction set architecture, hardware‑software ecosystems, multi‑task scheduling algorithms, inter‑process communication primitives, software timers, and concrete RISC‑V and Cortex‑M porting implementations with Rust and assembly examples.
Since the early 2000s, embedded software engineers combined hardware expertise with low‑level C and assembly coding, but the shift to complex 32‑bit architectures, IoT demands, and high‑level development tools is eroding the need for deep hardware knowledge, prompting a debate over the future role of traditional embedded developers.
This article explains how Linux kernel abstracts diverse GPIO hardware through a layered software framework, covering hardware variations, pin control, GPIO subsystem design, and practical considerations for embedded engineers handling new boards and drivers.
