矩陣式鍵盤識別顯示電路的設(shè)計-在線瀏覽
2024-08-10 07:16本頁面
【正文】 NK3: CJNE A,07H,NK4 MOV KEYBUF,3 LJMP DK1NK4: NOPDK1: MOV A,KEYBUF MOV DPTR,TABLE MOVC A,A+DPTR MOV P0,ADK1A: MOV A,P3 ANL A,0FH XRL A,0FH JNZ DK1ANOKEY1: MOV P3,0FFH CLR MOV A,P3 ANL A,0FH XRL A,0FH JZ NOKEY2 LCALL DELY10MS MOV A,P3 ANL A,0FH XRL A,0FH JZ NOKEY2 MOV A,P3 ANL A,0FH CJNE A,0EH,NK5 MOV KEYBUF,4 LJMP DK2NK5: CJNE A,0DH,NK6 MOV KEYBUF,5 LJMP DK2NK6: CJNE A,0BH,NK7 MOV KEYBUF,6 LJMP DK2NK7: CJNE A,07H,NK8 MOV KEYBUF,7 LJMP DK2NK8: NOPDK2: MOV A,KEYBUF MOV DPTR,TABLE MOVC A,A+DPTR MOV P0,ADK2A: MOV A,P3 ANL A,0FH XRL A,0FH JNZ DK2ANOKEY2: MOV P3,0FFH CLR MOV A,P3 ANL A,0FH XRL A,0FH JZ NOKEY3 LCALL DELY10MS MOV A,P3 ANL A,0FH XRL A,0FH JZ NOKEY3 MOV A,P3 ANL A,0FH CJNE A,0EH,NK9 MOV KEYBUF,8 LJMP DK3NK9: CJNE A,0DH,NK10 MOV KEYBUF,9 LJMP DK3NK10: CJNE A,0BH,NK11 MOV KEYBUF,10 LJMP DK3NK11: CJNE A,07H,NK12 MOV KEYBUF,1
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鄂ICP備17016276號-1