Author: Graham Kruk

The ARM exception return is a key mechanism that allows ARM processors to handle exceptions and interrupts efficiently. When an exception or interrupt occurs, the processor needs to save its current state, handle the exception, and then return to where it left off. The exception return handles the return step, restoring the previous state so

The ARM Cortex-M processors contain a number of special purpose registers that are used to configure and control critical system operations. One important set of SP registers are related to managing the stack pointer and stack operations. Understanding these SP registers is key to effectively utilizing the Cortex-M stack. Main Stack Pointer Register (MSP) The

The stack pointer is one of the key registers in the ARM Cortex-M0 processor. It points to the top of the stack, which is a region of memory used to store temporary data during function calls and interrupts. Understanding how the stack pointer works is essential for programming and debugging Cortex-M0 based microcontrollers. What is

The ARM Cortex-M0 is a 32-bit RISC processor core designed for microcontroller applications. It is one of the simplest and most energy-efficient processors in the Cortex-M family. Understanding the boot sequence of Cortex-M0 microcontrollers is important for developers working on embedded and IoT projects using these devices. On reset or power-on, the Cortex-M0 microcontroller begins

ARM Cortex-M processors contain a number of key registers that are essential for programming and interacting with the core. These registers control critical functions like interrupts, exceptions, power modes, and core peripherals. Understanding the role of each register is important for effectively utilizing the Cortex-M processor. Program Status Register The program status register (PSR) contains

The ARM Cortex-M3 is a 32-bit reduced instruction set computing (RISC) processor designed for embedded applications. It features the ARMv7-M architecture and Thumb-2 instruction set which provides a balance between high performance, low cost, and low power consumption. Instruction Set Overview The Cortex-M3 instruction set is based on the Thumb-2 technology which combines variable length

The ARMv7-M architecture is a 32-bit ARM processor architecture that is optimized for microcontroller applications. It includes the Thumb-2 instruction set, which is a superset of the original 16-bit Thumb instruction set. The Thumb-2 instruction set provides both high code density through 16-bit Thumb instructions and high performance through 32-bit ARM instructions. This article provides

An application binary interface (ABI) defines how application programs can interact with the operating system or other programs on a computer system. It specifies the low-level binary interface between an application and the operating system or between applications. An ABI ensures binary compatibility so that an application built for one system can run on another

The ARM Embedded Application Binary Interface (EABI) is a standard that defines how executable code interacts with the system software and hardware on ARM-based processors. It specifies details like calling conventions, register usage, stack organization, and data type representations to enable compatibility between different compilers, operating systems, and applications running on ARM devices. Background In

The ARM Cortex M0 is a 32-bit processor core designed for microcontroller applications. It is one of the smallest and lowest power ARM processor cores available, making it well-suited for IoT and wearable devices. Understanding the instruction execution times for the Cortex M0 is important for optimizing performance in time-critical applications. In general, most instructions