Arm

The ARM Cortex-M0 is a 32-bit RISC processor optimized for low-power embedded applications. Its assembly instruction set provides basic computational and data transfer capabilities through simple, fixed-length instructions. While more complex operations require sequences of these basic instructions, the Cortex-M0 ISA aims to maximize performance per clock cycle. Data Processing Instructions These allow basic arithmetic…

The stack pointer on the ARM Cortex-M0 microcontroller is one of the key registers used for managing the stack memory region. The Cortex-M0, along with the entire Cortex-M series of microcontrollers, utilizes a stack-based architecture for function calls and interrupt handling. Understanding how the stack pointer operates is essential for effectively using the Cortex-M0 in…

The Cortex-M0 SysTick timer is a simple countdown timer available in ARM Cortex-M0 and Cortex-M0+ processors. It provides a simple way to generate periodic interrupts for operating system ticks or software delays. The SysTick timer is integrated into the core of Cortex-M0 processors and does not require any external components or peripherals. SysTick Overview The…

The ARM Cortex-M0+ processor is a 32-bit reduced instruction set computing (RISC) processor designed for embedded and Internet of Things (IoT) applications. It is an ultra-low-power microcontroller CPU that is highly energy-efficient while still providing good performance for basic tasks. Overview The Cortex-M0+ is part of ARM’s Cortex-M series of embedded processors. It is their…

The ARM Floating Point Unit (FPU) provides hardware support for calculations using floating point numbers. The FPU instruction set allows ARM processors to perform mathematical operations efficiently on single precision and double precision floating point values. Overview of ARM FPU The ARM FPU is an optional extension to the ARM instruction set architecture. It provides…

The ARM Cortex-M0 is a 32-bit reduced instruction set computing (RISC) processor designed for microcontroller applications. It is one of the simplest and smallest processors in the Cortex-M series, aimed at low-cost and low-power embedded systems. The Cortex-M0 clock speed determines how fast instructions are executed and ultimately limits the performance of the microcontroller. Cortex-M0…

The ARM application binary interface (ABI) defines the low-level interface between an application and the ARM processor architecture. It determines how functions are called between an application and the operating system as well as how data is passed between the two. Understanding the ARM ABI is crucial for developing applications that are compatible and optimized…

ARM CPUs can be broadly divided into three profiles – Application profile, Real-time profile and Microcontroller profile. The Application profile is meant for high performance application processors like those used in smartphones. The Real-time profile is for real-time embedded systems that need deterministic timing behavior. The Microcontroller profile covers the microcontroller market and aims to…

Assembly language is a low-level programming language that directly corresponds to a computer’s underlying machine or assembly language. Unlike high-level languages like C/C++, assembly language consists of mnemonic codes that directly control a microprocessor’s components like registers, arithmetic logic unit, etc. Learning assembly language allows programmers to write optimized code by directly controlling the CPU’s…

The ARM Cortex-M3 is a 32-bit RISC processor core licensed by ARM Holdings. It is intended for microcontroller use, and has been implemented by many chip manufacturers in their microcontroller products. The Cortex-M3 processor has a 3-stage pipeline and uses the ARMv7-M architecture, which includes Thumb-2 technology for improved code density. This allows it to…