Although touch screens are rapidly gaining popularity, most developers have never developed touch screen products before. This article introduces the design steps of touch screen products in detail, and guides the reader to understand the hardware and software details required to make the touch screen work for the first time.
Touch screens are now everywhere. Many industrial control systems, consumer electronics, and even medical equipment are equipped with touch screen input devices. We usually use touch screens inadvertently. The touch screen may be used when withdrawing money from ATMs, signing packages, checking in for check-ins, or looking up phone numbers.
This article introduces two newer CPUs, both of which have built-in support for touch screen input. This article will describe how to write software drivers so that these microprocessors can be used to configure, calibrate the touch screen, and continuously respond to touch screen input. Eventually, working code that can be downloaded and used for free will be provided as a basis for further design by the reader.
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