软件开发_5_nesC.pdfVIP

The nesC Language: A Holistic Approach to Networked Embedded Systems David Gay‡ Philip Levis† Robert von Behren† dgay@ pal@ jrvb@ Matt Welsh‡ Eric Brewer† David Culler†‡ mdw@ brewer@ culler@ † EECS Department ‡ Intel Research, Berkeley University of California, Berkeley 2150 Shattuck Ave, Suite 1300 Berkeley, CA 94720 Berkeley, CA 94704 ABSTRACT A key focus of nesC is holistic system design. Mote applications We present nesC, a programming language for networked embed- are deeply tied to hardware, and each mote runs a single application ded systems that represent a new design space for application de- at a time. This approach yields three important properties. First, all velopers. An example of a networked embedded system is a sensor resources are known statically. Second, rather than employing a network, which consists of (potentially) thousands of tiny, low- general-purpose OS, applications are built from a suite of reusable power “motes,” each of which execute concurrent, reactive pro- system components coupled with application-specific code. Third, grams that must operate with severe memory and power constraints. the hardware/software boundary varies depending on the applica- nesC’s contribution is to support the special needs of this domain tion and hardware platform; it is important to design for flex