Digital PLL's -- Part 1

Neil Robertson

1. Introduction Figure 1.1 is a block diagram of a digital PLL (DPLL).  The purpose of the DPLL is to lock the phase of a numerically controlled oscillator (NCO) to a reference signal.  The loop includes a phase detector to compute ...


Best Firmware Architecture Attributes

Dr. Tayyar GUZEL
1 comment

Architecture of a firmware (FW) in a way defines the life-cycle of your product. Often companies start with a simple-version of a product as a response to the time-to-market caveat of the business, make some cash out...


A few uses for an autonomous vehicle

Ed Nutter

From the time technology that we have come to know was invented, it has been used to gain an advantage militarily or to make life easier. Military usage seems to be a driving factor, but it is not the only factor. Guerilla tactics played...


Stability or insanity

Tim Wescott

I've just spent over two weeks getting ready to do my next video.  It was a combination of one of those vast underestimations one occasionally makes, combined with falling into a bit of an obsession.I am, at this point, not only wondering if...


Beyond the RTOS: A Better Way to Design Real-Time Embedded Software

Miro Samek

An RTOS (Real-Time Operating System) is the most universally accepted way of designing and implementing embedded software. It is the most sought after component of any system that outgrows the venerable "superloop". But it is also the design...


Data Types for Control & DSP

Tim Wescott

There's a lot of information out there on what data types to use for digital signal processing, but there's also a lot of confusion, so the topic bears repeating.I recently posted an entry on PID control. In that article I glossed over the data...


Embedded Firmware Refactoring, Optimisation and Migration

Smith

Legacy products are often based on older hardware platforms which often become under-powered or run out of memory which constrains further product development. Customers are always looking for new features and improved performance but...


Basic Sensors for an Autonomous Vehicle

Ed Nutter
1 comment

The following are a few basic sensors that can be used to help an autonomous vehicle navigate its environment.The faster the vehicle is traveling, the faster the sensor must be processed.  Moving vehicles could knock something over or...


3 Good News

Stephane Boucher

Good News #1 Last week, I announced a new and ambitious reward program that will be funded by the new Vendors Directory. This week, I am happy to announce that we have our firsts two sponsors!  Quantum Leaps & Abelon Systems have...


Cutting Through the Confusion with ARM Cortex-M Interrupt Priorities

Miro Samek
1 comment

The insanely popular ARM Cortex-M processor offers very versatile interrupt priority management, but unfortunately, the multiple priority numbering conventions used in managing the interrupt priorities are often counter-intuitive, inconsistent,...