單片機(jī)課程設(shè)計(jì)擴(kuò)展時(shí)鐘系統(tǒng)實(shí)驗(yàn)-在線瀏覽
2025-03-05 11:28本頁面
【正文】 movx dptr, a 。 顯示下一位 rl a mov r2, a inc r0 djnz r1, Loop retTestKey: 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,10HGetKey: MOV 13H,06H MOV 12H,20HKey2: 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 Key2Key1 : 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 GetKey3GetKey1: MOV A,14H JNB ,GetKey2 INC 13H INC 13H SJMP GetKey3GetKey2: MOV A,14H JNB ,GetKey3 MOV A,03H ADD A,13H MOV 13H,AGetKey3: MOV DPTR,0E101H CLR A MOVX DPTR,AGetKey4:
試題試卷相關(guān)推薦
鄂ICP備17016276號(hào)-1