When writing low-level embedded C code for ARM Cortex-M, understanding the ARM function call stack frame is essential for analyzing memory usage, optimizing performance, and debugging hard faults. This post dives deep into the ARM calling conventions, stack frame setup, and the distinction between caller-saved and callee-saved registers — all through practical examples. ARM Cortex-M

When integrating a Real-Time Clock (RTC) into embedded systems, especially in ultra-low-power or time-critical applications, some issues may not become apparent until after deployment. These issues can result in unexpected behavior, data loss, or inaccurate timekeeping. Below is a comprehensive list of real-world RTC challenges commonly faced by developers and product teams, particularly when working

An RTC (Real-Time Clock ) is a specialized timing component used to maintain accurate timekeeping. It is essential in applications where precise, scheduled operations are required. Beyond its use in clocks and watches, RTCs play a critical role in devices like smart meters, washing machines, medicine dispensers, data loggers, and other time-sensitive systems. STM32 comes

In embedded systems, sharing clock signals externally is often essential for synchronizing peripherals or other microcontrollers. Most of the popular Microcontrollers often need to share their internal clock signals with external components. The STM32H573 supports this via Microcontroller Clock Outputs (MCO) on two GPIO pins: PA8 (MCO1) and PC9 (MCO2). Whether you’re debugging clock issues or