LCD12864顯示模塊與微處理器的接口設(shè)計(并接)

1、 LCD12864顯示模塊與微處理器的接口設(shè)計3中國礦業(yè)大學(xué)信電學(xué)院史良摘要文章詳細介紹了LC D12864顯示模塊的特性、及顯示程序流程圖。關(guān)鍵詞LC D12864顯示模塊液晶能儀器的設(shè)計, , 因此儀器中就必須配備各種各樣的顯示器, 以便顯示輸入?yún)?shù)和測量輸出的結(jié)果。在便攜式低功耗儀器中, 為了縮小體積、降低功耗, 儀器一般都采用液晶顯示器LC D (Liquid crystal display 。這里介紹一種新型的液晶顯示模塊LC D12864。1顯示模塊(LC D 12864 的特性LC D12864為數(shù)字點陣式液晶模塊, 它包括12864點的液晶面板、C MOS 驅(qū)動。由于該模塊有整

2、體的圖形點陣顯示, 因而用它來顯示圖形和字符。它具有如下特性:C MOS 大規(guī)模集成電路LC D 驅(qū)動; 大容量圖形類型, 能夠顯示數(shù)字、字母、特殊字符、曲線、圖表和模型等; 陽性驅(qū)動; 高對比度、寬視覺范圍; 1/64分辨率。2LC D 12864的管腳說明表1LC D12864的管腳說明管腳名稱功能1G ND 地2VDD 邏輯電源3V0LCD 電源4D/I數(shù)據(jù)/指令控制信號:D/I=1, 數(shù)據(jù)輸入;D/I=0, 指令輸入5R/W數(shù)據(jù)指令讀寫控制信號:R/W =1, 數(shù)據(jù)指令讀出;R/W =0, 數(shù)據(jù)指令寫入6E 允許控制信號714D0-D7數(shù)據(jù)總線15CS1片選信號1, 高電平有效16CS

3、2片選信號2, 高電平有效17RST 復(fù)位信號, 低電平有效18VEE 負電源(-10V 輸出3LC D 12864的顯示模式LC D12864的顯示模式見表2。表2LC D12864的顯示方式控制指令代碼R/W D/I D7D6D5D4D3D2D1D0功能顯示開/關(guān)000011111I/O 控制顯示器的開/關(guān)狀態(tài)此時內(nèi)部RAM 和狀態(tài)不能被接受,1:ON;0:OFF初始行設(shè)定0011初始行設(shè)定(063 選擇一個特定的RAM 單元作為顯示的第一行, 在顯示器的上方頁面設(shè)置0010111頁面(07 設(shè)置RAM 的頁面值, 也即顯示器的X 坐標值設(shè)置Y 值0001Y 值(063設(shè)置顯示器的Y 坐標

4、讀顯示器內(nèi)部狀態(tài)10000讀顯示器狀態(tài):RESET 1:復(fù)位;0:正常ON/OFF 1:顯示器關(guān);0:顯示器開BUSY 1:內(nèi)部在運行;0:準備狀態(tài)寫數(shù)據(jù)01寫數(shù)據(jù)將D0D7的數(shù)據(jù)寫入顯示器的RAM 中讀數(shù)據(jù)11讀數(shù)據(jù)將顯示器中RAM 的數(shù)據(jù)通過D0D7讀出來4LC D 12864與微處理單元的連接在電路中,LC D12864與單片微機的接線如圖1。3本文項目受國家自然科學(xué)基金(項目批準號:59874028 資助此時,LC D12864可通過單片機的P1口選擇控制。由顯示器的時序圖(圖2、圖3 可知每向顯示器寫入一個數(shù)據(jù)/指令或讀出一個數(shù)據(jù)/狀態(tài)時, 均需給使能端E 一個脈沖的下降沿, 這時可

5、考慮使用單片機的讀/寫信號的下降沿來驅(qū)動(圖4、圖5 。在61礦業(yè)安全與環(huán)保1999年第5期MINING SAFET Y &ENVIR ON MENTA L PR OTECTION N O. 51999 圖1 圖2LC D12864 的讀操作圖3LC D12864 的寫操作圖4單片機讀外部RAM 的時序圖5單片機寫外部RAM 的時序圖6程序流程圖本電路中采用單片機的讀信號和寫信號相與輸出的信號接入使能端E 即可完成對顯示器的操作。5顯示程序流程圖顯示程序流程如圖6所示。參考文獻1劉富強. . 中國2. 系統(tǒng)配置與. ,19903. 煤礦多媒體監(jiān)測監(jiān)控系統(tǒng)及其關(guān)鍵技術(shù)研究. 煤炭學(xué)報,1998(

6、4(收稿日期:1999-03-25; 責任編輯:吳自立(上接第15頁832Nm 3/h , 氮氣純度為97. 32%, 氮氣出口壓力為0. 5MPa , 起動時間21min ; 當由2臺該型號壓縮機向制氮設(shè)備供氣時, 氮氣產(chǎn)量為1050Nm 3/h , 氮氣純度為97. 25%, 氮氣出口壓力0. 6MPa , 起動時間23min 。在一個月的運行考核中, 制氮機未發(fā)生故障停機, 運行穩(wěn)定、可靠和移動性好。利用該制氮設(shè)備生產(chǎn)的氮氣, 向南一采區(qū)綜放工作面順槽注氮, 注氮量為13944m 3, 使封閉已久約12000m 3的火區(qū)徹底熄滅; 向南二綜采放頂煤工作面開眼注氮, 注氮量144240m

7、3, 使封閉約13000m 3的火區(qū)徹底熄滅。7結(jié)論(1 首次采用變壓吸附制氮技術(shù)成功地研制出制氮設(shè)備, 經(jīng)在華亭礦管會硯北礦的工業(yè)運行及性能考核, 主要技術(shù)指標達到設(shè)計要求, 它的研制成功, 為我國煤礦防滅火提供了大型移動式氮氣源設(shè)備。(2 在廣泛吸取國內(nèi)外變壓吸附碳分子篩制氮工藝流程優(yōu)點的基礎(chǔ)上, 結(jié)合我國鐵路、公路和礦區(qū)運輸條件而進行的優(yōu)化設(shè)計, 具有技術(shù)上的先進性和經(jīng)濟上的合理性。(3 本課題的技術(shù)創(chuàng)新在于成功地解決了大氣量壓縮空氣的凈化、大型吸附塔的結(jié)構(gòu)形式、專用氣流分布器、防止分子篩噴出和粉化的獨特壓緊裝置以及檢測儀表的信號輸出可與K J 4煤礦環(huán)境監(jiān)測系統(tǒng)聯(lián)網(wǎng)等關(guān)鍵性技術(shù)。參考文

8、獻1王長元, 陳孝通.JXZ D -400型井下移動式碳分子篩制氮車的研制. 煤炭工程師,1998(1 :2326(收稿日期:1999-05-24; 責任編輯:唐自強71礦業(yè)安全與環(huán)保1999年第5期MINING SAFET Y &ENVIR ON MENTA L PR OTECTION N O. 51999AB STRACTS IN EN G LISH OF THIS ISSUE(The serial numbers of the abstracts are identical with those in the contents Along with the advance of Scie

9、nce and technology ,man -made faults have become main factors to cause accidents. It is systematically analyzed and studied for the concept of man -made faults and the causes of faults made by underground coal miners in the paper. Based on the study ,a set of measures are put forward to control faul

10、ts made by miners in underground coal mines.The paper describes the structrure ,principle s oftware ,and operation results of device for steel belt in main cooperatively by the of Jincheng Mining Bureau and the C ollege. C ontinuous m onitoring for joints of steel belts and broken wire and warning o

11、f faults can be realized by using electromagnetic probes and com puter in the system. It is dem onstrated by application that the device is accurate in detecting data , convenient , flexible in operation and safe , reliable in performance.Experiment of electromagnetic radiation technique to predict

12、outburst risk was carried out in a coal heading face in F 15seam. in No. 8Mine of Pingdingshan C oal C o. Ltd. (G roup . Based on investigation of the experiment , the relationship between electromagnetic radiation and outburst risk in front of the face was derived and the critical value of outburst

13、 prediction index was obtained preliminarily. The operating principle ,technical parameters ,structure , function and the developed result of M odel SG S dual -function high -pressure water gauge were dealt with in detail in the paper. The gauge can simultaneously measure quantity and pressure of wa

14、ter in fused into coal seam. Dewatering tests were conducted under pressure for fine coal powder of 3kinds of coal form Y anzhou , Dadun and Xuzhou. The in fluence of pressure and surface active agent on the m oisture of filtered sam ple cake was investigated and the filtering speed and dewatering r

15、esult were measured. The measured results were com pared with that obtained under vacuum condition.The paper described the principle of nitrogen generation , technological process (selection and arrangement of necessary equipment , performance test and fire -fighting results of type KY Z D -800large

16、 m obile nitrogen generation installation of mine use on surface.The characteristics , pin description , display m ode ofNew LC D1284display m odule , its connection withmicroprocess or and flow chart of display process were presented in detail in the paper. The m odule can find wide application in

17、intrinsically. Safe instruments with low power consum ption used in coal mines.In No. 2occurred frequently with boreholes to drain gas s first mining of the thin seam of outburst. In order to s olve the problem , were arranged in the hard slice in stead by making full use of the great difference of

18、outburst risk between the s oft and hard slices. Thus initial success was obtained in the experiment of long -hole v olley shotfiring to prevent outburst of gas and coal.The chemical separation results of antiager A with different dispersity against spontaneous combustion of long flame coal from G e

19、ncun Mine in Y ima was researched. It was shown by the research result that antiager A has obvious separation effect on spontaneous combustion of the coal , and the separation effect can be im proved with the increase of dispersity of antiager A. The effect of 5%antiager A with disperser can be high

20、er than that of 20%magnesium chloride , only a little lower than that of 5%antiager A without disperser. With disperser added ,the used am ount and cost of antiager A can be cut down greatly.Based on the analysis of hydrogeological condition of Liuqiao No. 2Mine ,it was indicated that the main cause of actual water in flow bigger than calculated one was expansion of openings of rock cracks resulted by shock from blasting , water washing and rock displacemnet under co