外文翻譯--基于單片機(jī)的學(xué)習(xí)式倒計(jì)時(shí)器-全文預(yù)覽
【正文】 he countdown ought to be able in the current signal phase closure time to demonstrate the black screen. In view of the above request, used the C language to pile corresponding control software. Software design main flow as shown in Figure 8. The system can study the signal light time, the study black screen, demonstrates the corresponding countdown time in the corresponding signal bright time interval, when the yellow light is bright closes the demonstration. Can through dial the code switch choice different display mode. The interrupt subroutine pletes red, the green time time study function and demonstration countdown function . Interrupt subroutine flow chart like chart 9. 。s inside crystal oscillator39。 counting down 0 foreword traffic signal control goes on a journey regarding the people have the vital significance, but the countdown may remind the people surplus time, attention street intersection traffic condition. The countdown display monitor coordination signal instruction lamps and lanterns use, uses in the urban four corners demonstrating that the current path passes through the exact time which the stagnation or leads the way, the convenient people prepare for the stop and vanguard, is suitable in the town road intersection, highway, high structure bridge and so on. 1 countdown introduction road traffic countdown may divide into 2 broad headings according to the control type, one kind is the study type countdown, one kind is the news countdown, this kind of countdown in decides cyclical under the signal control pattern to use. What this system design is the study type countdown. This system has the following characteristic:① The design is the independent module, uses studies independently the type working, but adapts the streettraffic control lights time change automatically。能通過(guò)撥碼開(kāi)關(guān)選擇不同顯示模式
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