(电动机)微机课设.docx

.486p data segment use16 at 0 org 1000hPORT2EQU360H ;数码管位选端口，键盘矩阵的行列端口PORT1EQU340H ;数码管段选端口Keyn db ?overflagdb?teflag db?direction db ?speed db? stackp equ 1100h data endscode segment use16 assume cs:code,ds:data,ss:data org 1500hbeg:jmp startSEVENCOD DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H;,88H,83H,0C6H,0A1H,86H,8EH ;定义0F所对应的段码值KEYCOD DB 0EEH,0DEH,0BEH,0EDH,0DDH,0BDH,0EBH,0DBH,0BBH,0E7H,0D7H,0B7H ;所有键的键码值，高4位为列信息低4位为行信息KEYVAL DB 0,1,2,3,4,5,6,7,8,9,0AH,0BH ;所有键的键面值start: mov eax,60000000h mov cr0,eax mov ax,data mov ds,ax mov ss,ax mov sp,stackp;- ;初始化8255mov ax,8080h ;方式0mov dx,20chout dx,axmov dx,208h ; 红色mov ax,0505hout dx,ax;另一片mov dx, 20fh ;控制端口地址mov al,10000000b ;初始化out dx,al;- ;初始化8254;0控制口mov al,00110110bmov dx,30chout dx,almov ax,47000 ;计数初值mov dx,300hout dx,almov al,ahOUT dx,al;1控制口mov al,01110000bmov dx,30chout dx,al;-;设置中断向量mov ax,0mov es,axmov bx,08h*4hmov ax,offset intsrMOV es:word ptrbx, axmov ax,seg intsrmov es:word ptrbx+2, ax;初始化8259ICW1.2.4mov al,00010011b ;ICW1单片，边沿触发，mov dx,3a0hout dx,almov al,00001000b ;ICW2中断类型号是08Hmov dx,3a8hout dx,almov al,00000101b;ICW4非自动中断，8086模式，主片out dx,al ;8259中断屏蔽字mov al,11111110bmov dx,3a8hout dx,alsti;开中断;Cont:mov direction,0ffhCALL RTCmp Keyn,0Jnz L1Mov teflag,0jmp sLL1:cmp Keyn,1Jnz L2Mov teflag ,1jmp sLL2:cmp Keyn,2Jnz L3INC SPEEDjmp sLL3:cmp Keyn,4Jnz L4DEC SPEEDjmp sLL4:cmp Keyn,5Jnz L5Mov direction ,0ffhjmp sLL5:cmp Keyn,6Jnz L6Mov direction ,0bfhjmp sLL6:sLCALL Dshowjmp cont;Dshow proc PUSH AXPUSH CXPUSH DXmov ah,0mov al,speedmov cl,16div cllea bx,sevencod ;显示数据xlat sevencodmov dx,201hout dx,almov al,ahxlat sevencodmov dx,205hout dx,al mov dx,204hmov al, directionout dx,alPOP DXPOP CX POP AXRETDshow endp;RT procPUSH AXPUSH BXPUSH CXPUSH DXPUSH SIPUSH DIWT:INAL,DX ;是否有键按下AND AL,0FH ;从行值判断CMPAL,0FHJZ WT ;有按键按下,继续执行 NOP NOP MOVDX,PORT2 ;再次确认是否有键按下INAL,DXANDAL,0FH CMP AL,0FHJZWT;-;对每一列进行逐行扫描MOVCX,3 MOVBL,7BH ; 从第三列开始扫描NEXT: MOV AL,BLMOVDX,PORT2OUTDX,ALNOPNOPINAL,DX AND AL,0FH CMP AL,0FH JNZ KEY ;不等 说明有键 RCR BL,1 LOOP NEXT JMP WTKEY: MOVCL,4SHL BL,CL ; 高位列值 OR AL,BL ;形成一个字节的键码信息存入AL,高4位为列信息低4位为行信息 ;根据键码查找按键值;- LEA SI,KEYCOD LEA DI,KEYVAL MOV CX,12NEXT1: CMP AL,SI JZ FIND INC SI INC DI LOOP NEXT1 JMP WTFIND: MOV AL,DI;AL中为按键的键值,查表转换成段码后，显示Mov keyn,al NOP NOP;-WAIT1: IN AL,DX;等待按键释放 AND AL,0FH CMP AL,0FH JNZ WAIT1 POP DI POP SIPOP DX POP CX POP BXPOP AXretRT endp; delay procpush dxpush axmov ax,47000 ;计数初值mov dx,301hout dx,almov al,ahOUT dx,almov dx, 207h ;B端口地址ga:in al,dxtext al,10000000jz gapop axpop dxretdelay endp; intsr proc ;中断服务程序push axpush cxpush dxpush bxs