Arm

The ARM Cortex M3 is a 32-bit processor, which means it primarily operates on 32-bit data. However, it does have some limited support for 64-bit data types and operations. In this article, we’ll look at the 64-bit capabilities of the Cortex M3 and how to use them. 64-bit integer types The Cortex M3 supports two…

The ARM Cortex M3 processor has limited built-in support for floating point operations. While the Cortex M3 CPU core itself does not contain floating point hardware, the processor includes an optional coprocessor interface that allows a floating point coprocessor to be added. This provides Cortex M3 based microcontrollers with the ability to perform floating point…

Mutexes are a critical tool for ensuring thread safety in multi-threaded applications on ARM Cortex M3 microcontrollers. A mutex provides mutual exclusion, allowing only one thread to access a shared resource or section of code at a time. This prevents data corruption and race conditions when multiple threads read and write the same data concurrently….

The ARM Cortex M3 processor implements atomic 32-bit writes, meaning writes of 32-bit values are guaranteed to complete without interruption. This ensures data integrity when writing to memory-mapped peripherals or shared memory locations. Introduction to Atomicity Atomicity refers to whether an operation can be interrupted midway through its execution. An atomic operation will either complete…

The ARM Cortex-M3 is a 32-bit processor core designed for embedded and IoT applications. It is part of ARM’s Cortex-M series of cores, which are optimized for microcontroller and deeply embedded applications requiring low cost and power consumption. Key Features and Benefits of the Cortex-M3 Some of the key features and benefits of the Cortex-M3…

The Cortex-M3 processor from ARM has several operational modes that provide different levels of access and functionality. At the highest level, the Cortex-M3 has two main modes – Thread Mode and Handler Mode. Within Thread Mode, there are additionally Privileged and Unprivileged modes. Understanding these various operational modes is key to utilizing the capabilities of…

ARM processors support a variety of addressing modes that allow accessing operand data in flexible ways. The addressing modes determine how the processor calculates the effective address of an instruction’s operand. Choosing the right addressing mode can help optimize code size, performance, and efficiency. Register Addressing In register addressing mode, the operand value is located…

ARM Cortex-M processors utilize branch instructions to alter the flow of a program by jumping to a new location in code. Branching allows for non-linear program execution, which is essential for implementing loops, conditional statements, and function calls. Types of Branch Instructions There are several types of branch instructions available in the ARM Thumb and…

Post-indexed addressing modes in Arm Cortex M refer to addressing modes where the address is calculated first before being used, and then the address register is updated after. This allows efficient accessing of data structures like arrays or buffers where you want to increment the address after each access. The key benefit is that the…

The Arm Cortex-M processors support several pre-indexed addressing modes that allow efficient access to arrays and structured data. These addressing modes automatically increment or decrement an index register as part of the address calculation, reducing code size and increasing performance when accessing sequential data structures or arrays. Overview of Pre-Indexed Addressing In pre-indexed addressing modes,…