微機課程設(shè)計報告-交通(編輯修改稿)
2025-02-17 17:13 本頁面
【文章內(nèi)容簡介】 ioportC equ ioport+0298hioportRr equ ioport+02a0h 。點陣控制地址ioportRy equ ioport+02a8hint_vect EQU 72H 。中斷07 的向量為:08h0fh,中斷815 的向量為:70h77hirq_mask_2_7 equ 11111011b 。中斷掩碼,中斷07 時從低至高相應(yīng)位為零,中斷815 時第2 位為零irq_mask_9_15 equ 11111011b。中斷07 時全一,中斷815 時從低至高相應(yīng)位零ioport_cent equ 0e800h 。tpc 卡中9054 芯片的io 地址data segmentcsreg dw ?ipreg dw ? 。舊中斷向量保存空間irq_times dw ? 。中斷計數(shù)buffer0 db 00h,01h,02h,03h,04h,05h,06h,07hbuffer1 db 10h,38h,10h,10h,10h,20h,7eh,20hgewei dw 0shiwei dw 0Led db 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh。碼msg1 db 0dh,0ah,39。display39。,0dh,0ah,39。$39。msg3 db 0dh,0ah,39。interrupt !!!!!! 39。,0dh,0ah,39。$39。data endsstacks segment stackdb 256 dup (?)stacks endscode segmentassume cs:code,ds:data,ss:stacks,es:datamain proc far 。Enable Local Interrupt Inputstart:climov ax,datamov ds,axmov es,axmov ax,stacksmov ss,axmov dx,ioport_cent+68h 。設(shè)置 tpc 卡中9054 芯片io 口,使能中斷in ax,dxor ax,0900hout dx,axmov al,int_vect 。保存原中斷向量mov ah,35hint 21hmov ax,esmov csreg,axmov ipreg,bxmov ax,cs 。設(shè)置新中斷向量mov ds,axmov dx,offset int_procmov al,int_vectmov ah,25hint 21hin al, 21h 。設(shè)置中斷掩碼and al, irq_mask_2_7out 21h, alin al, 0a1hand al, irq_mask_9_15out 0a1h, almov ax,datamov ds,ax。以上為中斷初始化部分。8253初始化部分mov dx,ioport_82533mov al,36hout dx,almov dx,ioport_82530mov ax,1000out dx,almov al,ahout dx,almov dx,ioport_82533mov al,76hout dx,almov dx,ioport_82531mov ax,1000out dx,almov al,ahout dx,al。8255初始化mov dx,io82553mov al,88hout dx,alsti。開中斷beg: mov irq_times,36go1: cmp irq_times,26 jl go2 mov ax,irq_times sub ax,26 call disp mov al,24h 。南北綠燈和東西紅燈亮10秒 mov dx,io82550 out dx,al mov cx,0008h mov ah,01h mov si,offset buffer0 d1: mov al,[si] mov bx,offset buffer1 。箭頭顯示橫向紅，列項綠 xlat mov dx,ioportC out dx,al mov al,ah cmp 20h,ah jb next0 mov dx,ioportRy out dx,alnext1:mov dx,ioportRr shl,ah inc si push cx mov cx,0fffhloop1:loop 1oop1 pop cx loop d1 jmp lllgo2: cmp irq_times,23 jl go3 mov ax,irq_times sub ax,23 call leddisp mov al,0 mov dx,io82550 out
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