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These blog posts concern the integration of hardware and software, such as writing device drivers for specific types of peripheral chips.

Introduction to Counter/Timer Hardware

 Printable PDF

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

 Printable PDF

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.

How Endianness Works: Big-Endian vs. Little Endian

 Printable PDF

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.

Introduction to Watchdog Timers

 Printable PDF

For those embedded systems that can't be constantly watched by a human, watchdog timers may be the solution.

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