【文章內(nèi)容簡介】 science and t echnologyscience and t echnology innovat ion is t o play t he r ole of science and t echnology as t he pr im ar y pr oduct ive f orce, act ive use of new t echnologies, new m at er ials, new pr ocesses, new equipm ent , incr ease invest ment in science and t echnology, st rengthening scientif ic and t echnological t r aining, speeding up t ransfor ming scient if ic and t echnological achievement s, f or ming a num ber of pr opr ietar y technology, enhancing cor e petit iveness. Resour cesaving t he resources saving ent erpr ise was t o r educe coal consum pt ion, wat er consum ption, elect ricit y at t he cor e, enhance t he oper ation of lean m anagem ent t o r ealize low consumpt ion, high ef ficiency, r educe pr oduction cost s. Second is t o st rengthen t he business, f inancial, m ater ial, inf orm at ion and t he opt imizat ion of or ganizat ion and management, s aving t he int er nal t r ansact ion costs. Har m onious development of harm onious developm ent is t o const ruct a for eign envir onment f or development . XI NG ref ers t o t he int er nal secur it y f ir m and int er nal m anagement of t he int ernal m anagem ent m easur es ar e eff ect ive, har m onious. Foreign cur r ency m eans Ent er pr ise coordinat ing development of hom eopat hy, well, get along wit h t he neighbor s bett er. ( B) XX 2021 five ent er pr is es building int r insic saf ety power pany goals ar e: unplanned out age 0 t im es. Class of disor der s 0, 0 is equivalent f or ced outage r at e. No per sonal inj ur y accident , m ater ial and equipm ent accidents do not occur , no f ir e, no envir onm ental polut ion accident . Enterprise integrated to achieve zero cases of violation, zero accidents, zero. Quality goal is: when generating capacity ≥ 7. 5 bilon kilowatt, sales of over 7. 1 bilon kWh, total profits of ≥ 306. 6 milon Yuan, . . . BFS+、 PI、 MI S、 SCM I nf orm at ion systems inf r ast ruct ur e, f uly int egr ated inf or mat ion syst em t o r ealize inf or m at ion r esour ces shar ing。 t o expand t he br eadt h and depth of t he por t al syst em , inf or m at ion syst em of Ent er pr ise M anagem ent Assist ant r ole t o play。 t o im pr ove t he day to day oper at ion and m aint enance oper at ion r ecor d of pr om ot ing causes and t r ansf er syst em 。 t o st r engt hen t he t r ainingI 基于 51 單片機的 LED 點陣顯示屏系統(tǒng)的設(shè)計與實現(xiàn) 摘 要： 本文介紹了一款以單片機 AT89S51 為控制器的 LED 點陣顯示屏系統(tǒng)的設(shè)計。該系統(tǒng)可實現(xiàn)中英文字符的顯示和動態(tài)特效顯示。并且可以通過級連的方式來擴大顯示屏幕的尺寸以達到增加顯示內(nèi)容的目的。系統(tǒng)采用 PC 機作為上位機，上位機向單片機發(fā)送控制命令和上位機所存儲的顯示代碼， AT89S51 單片機接收并處理 PC機的控制命令以及顯示代碼，由顯示驅(qū)動模塊驅(qū)動一個 1616 分辨率的 LED 點陣顯示屏的掃描顯示。 PC 機與單片機之間的通信采用 RS—232C 通信標(biāo)準(zhǔn)來實現(xiàn)。所選用的 AT89S51 單片機具有價格低廉程序?qū)懭敕奖愕奶攸c 使得整個系統(tǒng)方便維護和檢修。除此之外，該系統(tǒng)只占用了單片機少量的 I /O 口和內(nèi)存，為系統(tǒng)留下了功能擴展的空間。 關(guān)鍵字 ： AT89S51； LED 點陣顯示；串行通信 evaluat ion of scient if ic developm ent . Natur e secur it y t ype natur e securit y is t o m aint enance people of healt h value f or t arget , t hrough st rengthening secur it y based m anagement , and r is k m anagement , and equipm ent m anagement and t echnology super vision, ensur e pr oduction in t he people, and r eal, and syst em, and system, elem ent s secur it y reliable, and har m ony unif ied, f ul cont rol var ious against f actor s, achieved t hought no slack, and management no em pty document , and equipm ent no hidden, and syst em no blocked, and unit zer o nonst opped. Qualit y and ef f iciencyqualit y benef it is t o adhere t o t he enter prise survival, pr ofit and developm ent business t rut h, adher e t o t he all act ivit y is econom ic activit y, all cost s can be cont roled, m oney should not be wast ed m anagement philosophy, m anagement analysis, t o im prove management qualit y, im prove cost contr ol capacit y and m ar ket petit iveness. Innovation of science and t echnologyscience and t echnology innovat ion is t o play t he r ole of science and t echnology as t he pr im ar y pr oduct ive f orce, act ive use of new t echnologies, new m at er ials, new pr ocesses, new equipm ent , incr ease invest ment in science and t echnology, st rengthening scientif ic and t echnological t r aining, speeding up t ransfor ming scient if ic and t echnological achievement s, f or ming a num ber of pr opr ietar y technology, enhancing cor e petit iveness. Resour cesaving t he resources saving ent erpr ise was t o r educe coal consum pt ion, wat er consum ption, elect ricit y at t he cor e, enhance t he oper ation of lean m anagem ent t o r ealize low consumpt ion, high ef ficiency, r educe pr oduction cost s. Second is t o st rengthen t he business, f inancial, m ater ial, inf orm at ion and t he opt imizat ion of or ganizat ion and management, s aving t he int er nal t r ansact ion costs . Har m onious development of harm onious developm ent is t o const ruct a for eign envir onment f or development . XI NG ref ers t o t he int er nal secur it y f ir m and int er nal m anagement of t he int ernal m anagem ent m easur es ar e eff ect ive, har m onious. Foreign cur r ency m eans Ent er pr ise coordinat ing development of hom eopat hy, well, get along wit h t he neighbor s bett er. ( B) XX 2021 five ent er pr ises building int r insic saf ety power pany goals ar e: unplanned out age 0 t im es. Class of disor der s 0, 0 is equivalent f or ced outage r at e. No per sonal inj ur y accident , m ater ial and equipm ent accidents do not occur , no f ir e, no envir onm ental polut ion accident . Ent erpr ise int egrat ed t o achieve zero cases of violat ion, zero accidents, zer o. Qualit y goal is: when gener at ing capacity ≥ 7. 5 bilon kilowatt, sales of over 7. 1 bilon kWh, total profits of ≥ 306. 6 milon Yuan, . . . BFS+、 PI、 MI S、 SCM I nf orm at ion systems inf r ast ruct ur e, f uly int egr ated inf or mat ion syst em t o r ealize inf or m at io