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標題: 有沒有大佬可以用大白話幫忙講明白這個單片機匯編程序? [打印本頁]

作者: pcyyyy 時間: 2021-11-19 19:00
標題: 有沒有大佬可以用大白話幫忙講明白這個單片機匯編程序?
            ORG             0000H
            AJMP             MAIN
            ORG             0100H
MAIN:       MOV             P2,#00H
KEY0:       MOV             P3,#0FEH
            JNB             P3.4,K1
            JNB             P3.5,K2
            JNB             P3.6,K3

            MOV             P3,#0FDH
            JNB             P3.4,K4
            JNB             P3.5,K5
            JNB             P3.6,K6

            MOV             P3,#0FBH
            JNB             P3.4,K7
            JNB             P3.5,K8
            JNB             P3.6,K9

            AJMP       KEY0

K1:             MOV             P0,#0F9H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K2:             MOV             P0,#0A4H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K3:             MOV             P0,#0B0H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K4:             MOV             P0,#099H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K5:             MOV             P0,#092H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K6:             MOV             P0,#082H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K7:             MOV             P0,#0F8H
            ACALL       YSH1S
            AJMP       KEY0
            RET
K8:             MOV             P0,#080H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K9:             MOV             P0,#090H
            ACALL       YSH1S
            AJMP       KEY0
            RET

YSH1S:       MOV             R3,#10
LOOP:       MOV             R4,#200
LOOP1:       MOV             R5,#230
            DJNZ       R5,$
            DJNZ       R4,LOOP1
            DJNZ       R3,LOOP
            RET
            END

作者: wc86110 時間: 2021-11-20 09:34
這貨要軟硬結合才能明白它要做什么，光有注釋只能一知半解

作者: liht1634 時間: 2021-11-20 12:22
ORG             0000H                      ;復位處
            AJMP             MAIN    ;短跳轉至MAIN也就0100H地址處
            ORG             0100H
MAIN:       MOV             P2,#00H       ;P2.7-P2.0置0
KEY0:       MOV             P3,#0FEH    ;P3.7-P3.1置1，P3.0置0
            JNB             P3.4,K1          ;P3.4為0則跳轉至K1處
            JNB             P3.5,K2
            JNB             P3.6,K3

            MOV             P3,#0FDH
            JNB             P3.4,K4
            JNB             P3.5,K5
            JNB             P3.6,K6

            MOV             P3,#0FBH
            JNB             P3.4,K7
            JNB             P3.5,K8
            JNB             P3.6,K9

            AJMP       KEY0

K1:          MOV             P0,#0F9H ;P0=1111 1001B
            ACALL       YSH1S          ;短調用，延時
            AJMP       KEY0          ;短跳轉回KEY0，差不多就是C的While(1)
            RET                         ;這里是跑飛拉回

K2:             MOV             P0,#0A4H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K3:             MOV             P0,#0B0H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K4:             MOV             P0,#099H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K5:             MOV             P0,#092H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K6:             MOV             P0,#082H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K7:             MOV             P0,#0F8H
            ACALL       YSH1S
            AJMP       KEY0
            RET
K8:             MOV             P0,#080H
            ACALL       YSH1S
            AJMP       KEY0
            RET

K9:             MOV             P0,#090H
            ACALL       YSH1S
            AJMP       KEY0
            RET

YSH1S:       MOV             R3,#10
LOOP:       MOV             R4,#200
LOOP1:       MOV             R5,#230
            DJNZ       R5,$    ;R5內容減1 不為0返回本行繼續執行為0就向下執行
            DJNZ       R4,LOOP1       ;就是循環等待
            DJNZ       R3,LOOP
            RET
            END

作者: 冰火風輪 時間: 2021-11-20 17:11
P2 P3 組成矩陣鍵盤，識別鍵值驅動 P0 口共陽數碼管，顯示 1--9 一秒

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