微機(jī)原理課程設(shè)計(jì)報(bào)告(參考版)
2025-08-06 12:27本頁(yè)面
【正文】 與低四位相與 MOV AH,00H MOV SI,AX MOV AL,[BX+SI] OUT DX,AL MOV DX,MY8255_B MOV AL,0FEH OUT DX,AL CALL DALLY MOV AL,SEC AND AL,0F0H MOV AH,00H MOV SI,AX MOV AL,[BX+SI] OUT DX,AL MOV DX,MY8255_B MOV AL,0FDH OUT DX,AL CALL DALLY MOV AL,MIN AND AL,0FH MOV AH,00H MOV SI,AX MOV AL,[BX+SI] OUT DX,AL MOV DX,MY8255_B MOV AL,0FBH OUT DX,AL CALL DALLY MOV AL,MIN AND AL,0F0H MOV AH,00H MOV SI,AX MOV AL,[BX+SI] OUT DX,AL MOV DX,MY8255_B MOV AL,0F7H OUT DX,AL CALL DALLY MOV AL,HOUR AND AL,0FH MOV AH,00H MOV SI,AX MOV AL,[BX+SI] OUT DX,AL MOV DX,MY8255_B MOV AL,0EFH OUT DX,AL CALL DALLY MOV AL,HOUR AND AL,0F0H MOV AH,00H MOV SI,AX MOV AL,[BX+SI] OUT DX,AL MOV DX,MY8255_B MOV AL,0DFH OUT DX,AL CALL DALLY POP AX POP SI RET DALLY: PUSH CX MOV CX,0006HT1: MOV AX,009FHT2: DEC AXJNZ T2LOOP T1POP CXRETCODE ENDSEND START。置中斷標(biāo)志位 IF IRET 。十進(jìn)制調(diào)整，用于加法 MOV [SI+1],AL CMP AL,60H JNE TRNED MOV AL,0 MOV [SI+1],AL MOV AL,[SI+2] ADD AL,1 DAA MOV [SI+2],AL CMP AL,60H JNE TRNED MOV AL,0 MOV [SI+2],AL MOV AL,[SI+3] ADD AL,1 DAA MOV [SI+3],AL CMP AL,24H JNE TRNED MOV AL,0 MOV [SI+3],AL TRNED: MOV AL,[SI+1] MOV SEC,AL MOV AL,[SI+2] MOV MIN,AL MOV AL,[SI+3] MOV HOUR,AL POP SI 。若相等，則跳轉(zhuǎn) MOV AL,0 。AL 加 1 MOV [SI],AL CMP AL,100 。取 TIMER 的段地址 MOV DS,AX MOV SI,OFFSET TIMER 。置中斷標(biāo)志位 IF PUSH AX 。調(diào)用顯示子程序(disp) JMP AA1 。ICW2MOV AL, 03HOUT 21H, AL 。8259 初始化 MOV AL, 13HOUT 20H, AL 。段地址MOV SI, 003EHMOV [SI], AX 。中斷矢量地址MOV [SI], AX 。中斷MOV AX, 0000HMOV DS, AXMOV AX, OFFSET MIR7 。分頻MOV DX, A8254MOV AL, 010HOUT DX, ALMOV AL, 27HOUT DX, AL。8254MOV AL, 36H 。代碼段ASSUME CS:CODE, SS:SSTACK,DS:DATASTART:。初始化 HOUR DB 0 MIN DB 0TIMER DB 10 DUP(0)BUF DB 3 DUP(0) DATA ENDS SSTACK SEGMENT STACK 。定義數(shù)據(jù)段TAB DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H 。同時(shí)，對(duì)給過(guò)我?guī)椭乃型瑢W(xué)和各位指導(dǎo)老師再次表示忠心的感謝！參考文獻(xiàn)[1] 戴梅萼，(第三版).北京：清華大學(xué)出版社,2022[2] (第四版).北京：清華大學(xué)出版社,2022[3] 李順增，吳國(guó)東，：機(jī)械工業(yè)出版社,2022[4] [M].北京：科學(xué)技術(shù)文獻(xiàn)出版社， [5] [M].北京：清華大學(xué)出版社，[6] [M].人民郵電出版社，附錄源程序代碼：A8254 EQU 06C0H 。這次課程設(shè)計(jì)終于順利完成了，在設(shè)計(jì)中遇到了很多編程問(wèn)題，最后在老師的辛勤指導(dǎo)下，終于游逆而解。而且通過(guò)實(shí)踐能更了解理論知識(shí)。當(dāng)顯示正常的時(shí)候我們都忍不住地叫起來(lái)，大家都很興奮。最后通過(guò)老師耐心的指導(dǎo)和講解我們的程序終于完成了。剛看到課設(shè)題目的時(shí)候不知道該從哪開(kāi)始編起，后來(lái)老師給我們講了大概的設(shè)計(jì)思路和各個(gè)芯片的功能，才有了點(diǎn)頭緒。所以在編寫(xiě)程序之前必須有一個(gè)完整清晰的思路設(shè)計(jì)好各個(gè)模塊所實(shí)現(xiàn)的功能。通過(guò)對(duì)數(shù)字鬧鐘的匯編實(shí)現(xiàn)，對(duì)硬件特別是 8258255 并行口的原理和實(shí)現(xiàn)都有了很深的了解
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