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Introduction to Preemptive Multitasking

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Most real-time operating systems employ preemptive schedulers. This primer on preemption also looks at the kind of multitasking it enables.

Introduction to On-Chip Debug

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Motorola's Background Debug Mode is one of a variety of on-chip debug technologies. Collectively, they offer some of the best features of debug monitors and in-circuit emulators—with far less headache and cost.

How to Choose a Real-Time Operating System

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In the market for a commercial RTOS? This article provides an overview of RTOSes and how you can select the best one for your project. It ends with a list of vendors and their products.

Introduction to Finite Impulse Response Filters for DSP

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Finite impulse response (FIR) filters are the most popular type of filters implemented in software. This introduction will help you understand them both on a theoretical and a practical level.

Introduction to Counter/Timer Hardware

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Counter units (aka, timer units) are crucial components of most embedded systems and included in many microcontrollers. Here's a primer on the hardware.

Introduction to Closed-Loop Control and PID

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Most control systems utilize feedback in some manner. Here's a look at several fundamental feedback mechanisms, culminating in a description of a basic PID controller.

Embedded Linux and Copyright Law

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The rising popularity of Linux has spurred many embedded developers to consider it as an RTOS alternative. Here's the straight scoop on the legal implications for the proprietary parts of your firmware.

KVM: A Small Java Virtual Machine for J2ME

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Sun's K Virtual Machine gives embedded developers a virtual kick in the pants. KVM makes it possible to, for the first time, run Java programs on any 16-bit processor with 128KB of available memory.

Introduction to Priority Inversion

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When tasks share resources, as they often do/must, strange things can and will happen. Priority inversions can be particularly difficult to anticipate. A basic understanding of the problem is key.

How Endianness Works: Big-Endian vs. Little Endian

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Which is the most convenient end on your system? The choices are big endian and little endian.

Some human languages are read and written from left to right; others from right to left. A similar issue arises in the field of computers, involving the representation of numbers.

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