Author: Holly Lindsey

The Cortex-M3 processor has advanced memory access capabilities through the use of caches and shared memory regions. However, these features also impose certain constraints that need to be understood when developing applications. Careful memory architecture design is required to avoid hazards from overlapped or out-of-order memory accesses. Instruction and Data Caches The Cortex-M3 instruction and

When writing assembly code for ARM Cortex chips using Thumb instruction set, the BX and BLX instructions allow you to switch between Arm and Thumb states. Using them correctly is crucial for ensuring proper program execution flow. This comprehensive guide will provide developers with a deep understanding of how to utilize BX and BLX properly

When programming for the Cortex-M3 processor, it is important to keep the processor in Thumb mode rather than ARM mode. Thumb mode uses 16-bit Thumb instructions which take up less memory space than 32-bit ARM instructions. Staying in Thumb mode ensures your code remains compact and efficient. Here are some techniques to keep the Cortex-M3

The Current Program Status Register (CPSR) in Arm Cortex-M is a 32-bit register that contains condition code flags, interrupt disable bits, current processor mode bits, and other status and control information. The CPSR allows the processor to keep track of the current execution state of a program and controls how instructions are executed. It plays

The ARM architecture refers to a family of reduced instruction set computing (RISC) processors that are widely used in embedded systems and mobile devices. The ARM processors are known for their power efficiency and performance capabilities. Over the years, ARM has introduced several microarchitecture versions with improvements and new features. The major ARM processor families

The Cortex-M3 processor has a number of interrupts and exceptions that allow it to respond to events and handle errors gracefully. Interrupts are signals generated by hardware peripherals or software that cause the processor to suspend execution of the current program and run an Interrupt Service Routine (ISR) to handle the event. Exceptions are errors

Context switching on Cortex-M microcontrollers requires manually saving and restoring register contents when switching between tasks. This involves stacking key registers onto the process stack during a context switch so their values can be preserved for the next time the task executes. Care must be taken to save all necessary registers in the correct order.

When an interrupt occurs on a Cortex-M processor, the processor pushes registers onto the stack to save the current state before jumping to the interrupt handler. Understanding the stack frame layout during interrupts is important for debugging and optimizing interrupt performance. What Happens When an Interrupt Occurs On a Cortex-M processor, when an interrupt occurs:

A round-robin scheduler is a scheduling algorithm that sequentially cycles through a list of tasks, giving each task a slice of time to execute before moving on to the next task. Implementing a round-robin scheduler on Cortex-M microcontrollers can provide predictable multitasking capabilities for real-time embedded applications. Overview of Round-Robin Scheduling The key features of