【正文】 s Day on February 14, characterized by bouquets of roses, chocolates and romantic candlelight dinners, than they do about their homegrown day for lovers. Even Qixi is nowadays referred to as the Chinese Valentine39。s largest virgin forest, and known for its spring and ecological environment, Arxan is marveled at by many tourists as the purest land on earth. You cannot miss out the Autumn of Arxan. It is definitely the best with brightlycolored scenery full of emotions. Autumn in the northern part of the country es earlier than the South. A September rain followed by the footprints of Autumn brings more colors to the once emerald green mountain and blooming grassland. Shutterbugs flock to see for themselves the marvel of splendid colors around the mountains and waters, many of whom have travel a long distance and even camp here only to capture a moment of the nature wonder. The silver birch turns golden, while the larch is still proudly green. You will find yourself drowned in the intoxicating red of the wild fruits as well as the glamour of flowers in full blown. And your heart will be lingering on the woods as it39。以及同班的幾位同學(xué)的幫助，才使我順利的完成了論文。雖然時間不算長，但這卻是我學(xué)習(xí)生涯中的最關(guān)鍵時刻，使我終身難忘 。懂得了實踐和理論的相結(jié)合，以后走向工作崗位做好了準(zhǔn)備。 在調(diào)試的時候，硬件調(diào)試和軟件調(diào)試是分不開的，許多故障只有通過軟硬件聯(lián)合調(diào)試才能發(fā)現(xiàn)。通過此次單片機(jī)畢業(yè)設(shè)計 ,我知道自己在單片機(jī)的實際應(yīng)用方面還有很多不足的地方。實際生活中 ,要考慮的因數(shù)非常多 ,而我們學(xué)習(xí)的理論大多 數(shù)都是在理想狀態(tài)下的 .所以實習(xí)非常重要，而這一次的畢業(yè)設(shè)計不光要懂得理論，更多的是要我們動腦，動手做?？偨Y(jié)這三年來學(xué)了多少知識，也是自己給自己打分，因此我對畢業(yè)設(shè)計非常重視。 一旦松開 ,電平將變低。適當(dāng)延時 SJM PMAIN。例如對片選信號 ,運行下面的小程序就可以檢測出譯碼片選信號是否正常。 信號線是聯(lián)絡(luò) 8051 和外部器件的紐帶 ,如果信號線連結(jié)錯誤或時序不 對 ,那么都會造成對外圍電路讀寫錯誤。加電后檢查各插件上引腳的電位 ,一般先檢查 VCC 與 GND 之間電位 ,若在 5V～ 4． 8V 之間屬正常?？梢圆扇z查元器件與設(shè)計要求的型號、規(guī)格 和安裝是否一致。必要時利用數(shù)字萬用表的短路測試功能 ,可以縮短排錯時間。這類故障往往由于設(shè)計和加工制板過程中工藝性錯誤所造成的。 永城職業(yè)學(xué)院畢業(yè)論文 12 完整電路圖 圖 永城職業(yè)學(xué)院畢業(yè)論文 13 第三章 系統(tǒng)程序 主程序 READ EQU 0 WRITE EQU 2 EWEN EQU 4 EWDS EQU 6 FLG0 REG 08H CS REG CLK REG DI REG DO REG ADR46 REG 20H ORG 00H MOV SP, 60H MOV R7, 00H DJNZ R7, $ MOV P3, 10H MOV ADR46, 00H MOV A, READ CALL TO9346 MOV 3EH, 3CH MOV A, 3EH CJNE A, 01H, A2 SETB FLG0 MOV R2, 03H MOV R0, 35H MOV ADR46, 01 A1: MOV A, READ CALL TO9346 MOV R0, 3CH DEC R0 MOV R0, 3DH DEC R0 INC ADR46 DJNZ R2, A1 JMP START A2: CLR FLG0 MOV R7, 10H MOV R6, 06 MOV R1, 35H L1: MOV A, R7 永城職業(yè)學(xué)院畢業(yè)論文 14 MOV DPTR, TABLE MOVC A, A+DPTR MOV R1, A DEC R1 INC R7 DJNZ R6, L1 START: ORL P2, 0FFH MOV R4, 06 MOV R0, 36H CLEAR: MOV R0, 00H INC R0 DJNZ R4, CLEAR L2: MOV R3, 0F7H MOV R1, 0 L3: MOV A, R3 MOV P1, A MOV A, P1 MOV R4, A CLR C CPL C MOV R5, 04H L4: RLC A JNC KEYIN INC R1 DJNZ R5, L4 CALL DISP MOV A, R3 CLR C CPL C RRC A MOV R3, A JC L3 JMP L2 鍵盤掃描與識別程序 KEYIN: MOV A, R1 XRL A, 0EH JZ X4 MOV A, R1 MOV A, 0FH JZ X3 MOV R7, 10 永城職業(yè)學(xué)院畢業(yè)論文 15 D1: MOV R6, 248 DJNZ R6, $ DJNZ R7, D1 D2: MOV A, P1 XRL A,R4 JZ D2 MOV A, R1 MOV DPTR, TABLE MOVC A, A+DPTR MOV R7, A XRL A, 0AH JZ SET0 MOV A, R7 XRL A, 0BH JZ START MOV A, R7 XRL A, 0CH JZ L2 MOV A, R7 XRL A, 0DH JZ L2 MOV A, R7 XCH A, 36H XCH A, 37H XCH A, 38H XCH A, 39H XCH A, 3AH XCH A, 3BH CALL DISP JMP L2 X3: JMP DISP2 X4: JMP COMP 數(shù)碼顯示電路 DISP: MOV R0, 3BH DISP1: MOV A, R0 ADD A, 50H MOV P0, A CALL DELAY DEC R0 MOV A, R0 ADD A, 40H 永城職業(yè)學(xué)院畢業(yè)論文 16 MOV P0, A CALL DELAY DEC R0 MOV A, R0 ADD A, 30H MOV P0, A CALL DELAY DEC R0 MOV A, R0 ADD A, 20H MOV P0, A CALL DELAY DEC R0 MOV A, R0 ADD A, 10H MOV P0, A CALL DELAY DEC R0 MOV A, R0 ADD A, 00H MOV P0, A CALL DELAY RET DISP2: MOV R0, 35H CALL DISP1 MOV A, P1 XRL A,R4 JZ DISP2 CALL DELAY JMP START 掉電存儲子程序 O9346: SETB CS SETB DI