Arm

Unaligned access refers to memory access where the data being accessed is not aligned to the natural alignment of the processor. For example, a 32-bit integer or float on an ARMv7 processor is naturally aligned to a 4-byte boundary. Accessing a 32-bit integer at an address not divisible by 4 would be considered unaligned access….

The ARM Cortex-M0 is an ultra-low power 32-bit microcontroller core designed for embedded and IoT applications. It is part of ARM’s Cortex-M series of cores, which are optimized for low-cost and low-power embedded systems. The Cortex-M0 supports the ARMv6-M architecture, which includes some key features that enable efficient unaligned memory accesses. What is Unaligned Memory…

The SVC (Supervisor Call) instruction is an important part of the ARM instruction set architecture. It allows applications running in user mode to request privileged operations that require kernel access. The SVC instruction is used to perform system calls and other critical low-level functions needed by applications. What is the SVC Instruction? The SVC instruction…

The ARM Cortex-M series of processors are 32-bit RISC CPUs designed for embedded and IoT applications. They are known for their low power consumption, good performance, and relative simplicity compared to more complex architectures. One key aspect of the Cortex-M stack is its alignment requirements. In computer architecture, alignment refers to the positioning of data…

Context switching refers to the process of storing and restoring the state of a CPU so that execution can be resumed from the same point at a later time. This allows multiple processes to share a single CPU resource by multitasking between them. Context switching is an essential part of any multi-tasking operating system. The…

The ARM Cortex-M7 is a high-performance processor core designed for advanced embedded applications. It features a 3-stage pipeline, floating point unit, and optional MMU for efficient execution of complex tasks. The boot process of the Cortex-M7 initializes critical hardware components and transfers execution to the application code. Reset Sequence When power is first applied to…

Reverse engineering ARM binaries involves taking apart and analyzing ARM executable files to understand how they work. This allows researchers and developers to dig into closed-source ARM software, find vulnerabilities, modify behavior, or recreate functionality. The key steps in reverse engineering ARM binaries include: 1. Obtaining the ARM Binary The first step is to acquire…

The UART (Universal Asynchronous Receiver/Transmitter) is a widely used serial communication interface found in many microcontrollers and integrated circuits. But is UART considered a bus? The short answer is no, UART is not technically a bus. Here’s a more detailed explanation: A bus is a communication system that transfers data between components inside a computer…

The short answer is yes, UART is generally considered to be the same as serial communication. UART stands for Universal Asynchronous Receiver/Transmitter and it is a hardware protocol that allows serial communication between devices. What is UART? UART is a hardware protocol that handles asynchronous serial communication. It provides the following main functions: Some key…

UART (Universal Asynchronous Receiver/Transmitter) and I2C (Inter-Integrated Circuit) are two common communication protocols used in embedded systems and IoT devices. The main differences between UART and I2C are: What is UART? UART stands for Universal Asynchronous Receiver/Transmitter. It is a commonly used serial communication protocol that allows full duplex asynchronous communication between two devices. Some…