片機課程設計擴展時鐘系統(tǒng)實驗-在線瀏覽
2025-08-07 08:22本頁面
【正文】 orl a,02h movx dptr, a anl a,0fdh movx dptr, a mov a, r3 djnz B, DLP mov dptr, OUTBIT mov a, r2 movx dptr, a 。 顯示下一位 rl a mov r2, a inc r0 djnz r1, Loop ret TestKey: mov dptr, OUTBIT mov a, 0 movx dptr, a 。 讀入鍵狀態(tài) cpl a anl a, 0fh 。 數(shù)字鍵碼定義 db 00h, 01h, 04h, 07h db 0fh, 02h, 05h, 08h db 0eh, 03h, 06h, 09h db 0dh, 0ch, 0bh, 0ah db 10H,11H,12H,13H,14H db 15H,16H,10H,10H,10H GetKey: MOV 13H,06H MOV 12H,20H Key2: MOV A,12H CPL A MOV R7,A MOV DPTR,0E101H MOV A,R7 MOVX DPTR,A MOV A,12H CLR C RRC A MOV 12H,A MOV DPTR,0E103H MOVX A,DPTR MOV R7,A MOV A,R7 CPL A MOV R7,A MOV A,R7 ANL A,0FH MOV 14H,A DEC 13H MOV R7,13H MOV A,R7 JZ Key1 MOV A,14H JZ Key2 Key1 : MOV A,14H JZ GetKey6 MOV A,13H ADD A,ACC ADD A,ACC MOV 13H,A MOV A,14H JNB ,GetKey1 INC 13H SJMP GetKey3 GetKey1: MOV A,14H JNB ,GetKey2 INC 13H INC 13H SJMP GetKey3 GetKey2: MOV A,14H JNB ,GetKey3 MOV A,03H ADD A,13H MOV 13H,A GetKey3: MOV DPTR,0E101H CLR A
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鄂ICP備17016276號-1