In this blog post, I present a tutorial to build a voice activated Oxford dictionary using Amazon Alexa. You can talk to the dictionary and ask for definitions, example usage, synonyms or antonyms of any English word present in the Oxford dictionary. After reading this post, you should be able to build yourself and enjoy this voice controlled dictionary or even give it as a gift to your kids!

ARM Cortex-M core provides a number of features to support an RTOS. One of these features is the SVC instruction. Let’s understand how SVC works in ARM Cortex-M. This blog post demonstrates usage of SVC with an assembly code without using any RTOS.

Let’s explore a simple use of the SysTick timer provided in ARM Cortex-M devices. Though the primary intention of the SysTick timer is to be used as a periodic interrupt to invoke kernel in an operating system, it can also be used as a simple peripheral timer. This post also introduces you to exception handling mechanism of ARM Cortex-M core.

If you are like me, you always have the urge to understand ARM Cortex-M architecture in more details. You want to write a small code in assembly language to reach closer to the hardware. But you struggle to find a good how-to-guide for assembly programming. Most of the examples you find are written in higher level languages like C/C++. Don’t give up yet. Read on this post which will help you take the first step in learning ARM assembly programming.