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The Infinite Retina
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AcompellingandinsightfullookatthefutureofSpatialComputing,andhowthiscutting-edgetechnologyischangingthewaywedobusinessacrosssevenprimaryindustries,andwhatitmeansforhumanityasawhole.KeyFeatures*DiscoverhowSpatialComputingischangingthefaceoftechnology*GetaroadmapforthedisruptionscausedbySpatialComputingandhowitwillaffectsevenmajorindustries*Gaininsightsaboutthepast,present,andfutureoftechnologyfromtheworld’sleadingexpertsandinnovatorsBookDescriptionWhatisSpatialComputingandwhyiseveryonefromTesla,Apple,andFacebookinvestingheavilyinit?InTheInfiniteRetina,authorsIrenaCroninandRobertScobleattempttoanswerthatquestionbyhelpingyouunderstandwhereSpatialComputing―anaugmentedrealitywherehumansandmachinescaninteractinaphysicalspace―camefrom,whereit'sgoing,andwhyit'ssofundamentallydifferentfromthecomputersormobilephonesthatcamebefore.TheypresentsevenvisionsofthefutureandtheindustryverticalsinwhichSpatialComputinghasthemostinfluence―Transportation;Technology,Media,andTelecommunications;Manufacturing;Retail;Healthcare;Finance;andEducation.Thebookalsosharesinsightsaboutthepast,present,andfuturefromleadingexpertsanotherindustryveteransandinnovators,includingSebastianThrun,KenBretschneider,andHugoSwart.TheydiveintowhattheythinkwillhappeninSpatialComputinginthenearandmediumterm,andalsoexplorewhatitcouldmeanforhumanityinthelongterm.TheInfiniteRetinathenleavesituptoyoutodecidewhetherSpatialComputingistrulywherethefutureoftechnologyisheadingorwhetherit'sjustanexciting,butpassing,phase.Whatyouwilllearn*Lookbackathistoricalparadigmsthatchangedthefaceoftechnology*ConsiderhowSpatialComputingcouldbethenewtechnologythatchangesourlives*SeehowVirtualandAugmentedRealitywillchangethewaywedohealthcare*LearnhowSpatialComputingtechnologywillleadtofullyautomatedtransportation*ThinkabouthowSpatialComputingwillchangethemanufacturingindustry*ExplorehowfinanceandretailaregoingtobeimpactedthroughSpatialComputingdevices*HearaccountsfromindustryexpertsonwhattheyexpectSpatialComputingtobringtotheirsectorsWhothisbookisforTheInfiniteRetinaisforanyoneinterestedinthefutureoftechnologyandhowAugmentedRealityandSpatialComputing(amongotherdevelopments)willaffectbothbusinessesandtheindividual.

Irena Cronin;Robert Scoble;Steve Wozniak ·操作系統 ·13.4萬字

嵌入式微系統
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隨著高頻感應加熱電源的深入,涉及高速信號例行處理(10k/s),這個時候被迫放棄MCU51而遷移到CortexM3平臺,于是基于NXP的LPC1343把MS3升級為MS4,除了保留原來的功能外,主要引入了函數指針做界面設計,對于簡單的項目來說,比較容易實現。此外,根據項目需求把系統節拍按需求細分為10k/s、1k/s、100/s、10/s,緊急響應采用中斷,I/O狀態檢測、高速執行用10k/s,水壓、數碼管掃描顯示之類的用1k/s,按鍵掃描用100/s,LCD屏、數碼管數據顯示用10/s。這樣處理可以很好地把低速節拍分散到高速系統節拍中,不堆積在一個節拍中執行,避免單個系統節拍占用時間過長的問題。外部采樣檢測,一般不建議用中斷,盡可能用掃描方式的原因是:一是沒有這么多中斷口;二是中斷容易因為毛刺,導致多次中斷無法識別;三是可以采用濾波處理提高抗干擾能力。高頻感應加熱電源曾經一度想上RTOS實現實時響應,但遭到大家反對,因為那個時候我們對RTOS都不太熟悉,雖然有所了解,但沒有真正深入,尤其是實時這個概念都不是很清晰,所以認為深入分析透徹項目需求才是出路,后來準確分析項目需求后,提出了系統節拍的速度分級,很好地解決了實時性問題,系統穩定可靠。

王紹偉 鄭德智 吳玉勇 ·操作系統 ·13.2萬字

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