Writing Drivers for Common Touch-Screen Interface Hardware

摘要

Touch screens are everywhere. Industrial control systems, consumer electronics, and even medical devices are commonly equipped with touch-screen input. We use touch screens every day without even thinking about it. You might get cash at your ATM, sign for a package, check in for your flight, or look up a telephone number all by using a touch screen. This article describes two relatively new CPU offerings that provide built-in support for touch-screen input. I'll show you how to write a software driver that will configure, calibrate, and continuously respond to touch-screen input using either of these microprocessors. The result will be working code that you're free to download and use as a baseline for your own efforts.