Arm

Calculating the millions of instructions per second (MIPS) rating for an algorithm running on an ARM processor can provide useful insights into its performance and efficiency. The key steps are understanding the algorithm’s operations, determining the number of clock cycles for each operation on the target ARM chip, and factoring in the processor’s clock speed….

Implementing a loop position independent in ARM Cortex-M0+ requires utilizing the relative branch instructions available in the Thumb-2 instruction set. The key is to use PC-relative addressing rather than absolute jumps so that the target addresses do not need to change when the loop’s position in memory changes. Overview of Cortex-M0+ Branch Instructions The Cortex-M0+…

The Cortex Microcontroller Software Interface Standard (CMSIS) DSP library provides a wide range of digital signal processing functions that are optimized for ARM Cortex-M processor-based microcontrollers. Using the CMSIS DSP library in Keil projects can help improve performance and reduce development time compared to coding the DSP algorithms from scratch. What is the CMSIS DSP…

Yes, CMSIS stands for Cortex Microcontroller Software Interface Standard and it is a vendor-independent hardware abstraction layer for microcontrollers based on Arm Cortex processors. So CMSIS is essentially a library that provides a standard way to access the hardware features of Cortex-M processor-based microcontrollers from various Arm chip vendors. What is CMSIS? CMSIS defines interfaces…

The program counter and link register are two important registers used in ARM processors to handle program execution. While they serve complementary purposes, there are key differences between the two. What is a Program Counter? The program counter, commonly abbreviated as PC, is a processor register that contains the address of the next instruction to…

The ARM Cortex-M series of processors are extremely popular in embedded devices and IoT applications. They provide a good balance of performance, power efficiency and cost. Linux on the other hand is the most popular open-source operating system. Learning how to use the ARM Cortex-M processors with Linux allows developers to leverage the benefits of…

The ARM Cortex-M series of microcontrollers are extremely popular in embedded systems due to their low cost, low power consumption, and good performance. Using a Real-Time Operating System (RTOS) allows you to better structure your application software and take advantage of features like multithreading and inter-task communication. Here is a step-by-step guide on how to…

The ARM Cortex-M0 is an ultra low power 32-bit RISC CPU core designed for microcontroller applications. It is the smallest and most energy-efficient Cortex-M processor from ARM. The M0 core is optimized to provide an efficient solution for applications requiring minimal power consumption, with high performance and small code size. The power consumption of the…

Yes, ARM Cortex-M processors are capable of performing division operations in hardware. While earlier Cortex-M0 and Cortex-M0+ processors lacked a hardware divider, Cortex-M3 and newer Cortex-M processors include integer division instructions that can divide 32-bit values efficiently using a single cycle hardware divider unit. Hardware division support in Cortex-M processors The Cortex-M processor series is…

Interrupt latency and jitter are important performance metrics to consider when using Cortex-M processors. Interrupt latency refers to the time delay between the assertion of an interrupt request and the start of the interrupt handler execution. Jitter refers to the variation in interrupt latency from one interrupt to the next. Minimizing interrupt latency and jitter…