eBlocks Embedded Systems Building Blocks UCR嵌入式系统构件 UCR eBlocks.pptVIP

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2017-02-13 发布于上海
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eBlocks Embedded Systems Building Blocks UCR嵌入式系统构件 UCR eBlocks.ppt

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Applications and Experiments with eBlocks – Electronic Blocks for Basic Sensor-Based Systems A Typical Problem Solution: A Simple “Embedded System” Blink LED in bedroom if garage open at night Homeowner sees LED before bed Components needed LED Contact switch Light sensor Logic (no light AND switch not closed) Wireless transmitter Wireless receiver Possible solutions Alarm company -- too expensive Off-the-shelf Low volume product: hard-to-find, costly Inflexible: What if two garage doors; notification in 2 places; audible alert? Vendor can’t include everything Build it yourself Should be feasible for semi-skilled person Hard! -- Find components (where?), read datasheets (tough), program microcontrollers (much skill), build circuit boards (more skill) Low power issues Battery drains in 2 days Need packets and sleep - more skills Experiment 50 skilled students (CS, EE) given weeks 60% did not complete 40%’s solutions were not power efficient No way regular person could build it What’s Needed The wood and nails of the sensor world So novices can build simple things and semi-skilled people even more Our Solution – Off-the-Shelf Easy-to-Use Electronic Building Blocks -- eBlocks Connect eBlocks to Build Application Basic blocks enable variety Garage Open At Night Detector Flexible: 2 garages, 1 alert... Different applications w/ blocks Enables mass production Low cost: ~$4 (Harvard Bus.Sc.) Available: next to wood/nails? 2003-2004: ~100 prototypes, 15 types Size: deck of cards PIC processor and electronics 2+ years on 9-volt battery Protocol/architecture: ISSS/CODES’03 Illusion of continuous communication, but packets sleep Constraints timeouts (data, alive) ensure connect/disconnect response Hands-on -- intuitive, few abstractions Enables step-by-step design: DEMO 1000s of Applications, Not Just Garages Countless applications Residential Wireless doorbell, mail alert, gate open, motion on property, package on porch, customized motion lights, carpool alert Offic