Smartphones: Interfaces for Next-Generation Embedded SystemsSmartphones: Interfaces for Next-Generation Embedded SystemsKey PointsReplacing the user interface of an embedded design with an off-the-shelf smartphone may significantly reduce development effort. To interact with a smartphone, designers can choose between short-range Bluetooth and 802.11 networks or longer-range cellular networks for data transmission. Drop-in Web servers or various transceiver modules offer device OEMs an easy way to upgrade embedded devices to work like smartphones. [pic] With more than enough computing power, built-in programmable graphics algorithms, and a variety of communication options, smartphones provide a convenient and powerful mobile user interface for the growing number of smart embedded devices. With just a few clicks of a button on a portable smartphone, users can connect directly to security systems, industrial controllers, access control systems, medical equipment, environmental control systems, and home automation systems, and smartphones can even replace the various remote controls in most living rooms. For example, a production supervisor may be able to use his smartphone at home to receive an email alert directly from a malfunctioning factory automation equipment. Without having to return to the work site, he can call up the equipment\'s remote control panel on his smartphone to query operating parameters, make adjustments, or activate self-diagnosis procedures. With the same phone, he can even connect to and control other systems in the same factory. With customized applications, smartphones can also emulate the look and feel of many proprietary products and provide a user experience that simulates built-in embedded hardware interfaces. The ultimate goal of a popular computing interface is to provide a coherent and transparent interaction so that users do not realize they are interacting with a computer. Facial recognition, iris recognition, voice recognition and fingerprint analysis are a few technologies that can be used to effortlessly identify users. Other experimental user sensors such as eye tracking, lip reading and hand movement analysis may also provide a form of contactless input for embedded products in the future. Similarly, global positioning systems and video signal processing systems can provide precise location information. Although some of these technologies are already available, they are not advanced enough for embedded systems, and most of today\'s systems still require a user interface to input data...
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