基于單片機點對點通信設(shè)計-文庫吧資料
2024-10-16 09:26本頁面
【正文】 : MOV A,R1 MOV SBUF,A ADD A,R6 MOV R6,A JNB TI,$ CLR TI INC R1 DJNZ R7,LOOP JNB RI,$ CLR RI MOV A,SBUF XRL A,R6 JNZ LOOP2 MOV A,22H MOV SBUF,A JNB TI,$ CLR TI SJMP $ LOOP2:MOV A,33H MOV SBUF,A JNB TI,$ CLR TI LJMP LOOP3 RET 。發(fā)送數(shù)據(jù)子程序 (甲機通信協(xié)議 ) TXXY: 。 DE2: mov r6,0FFH DE1: djnz r6,DE1 djnz r7,DE2 ret 。 。鍵值存到 50H INC R0 CJNE R0,53H ,L1 MOV R0,50H L1: RET 。 CLR 。SCAN3: CJNE R5,13,KEY 。發(fā)送數(shù)據(jù)給乙機鍵 LCALL TXXY LJMP L1 SCAN2: CJNE R5,12,KEY。清零鍵 MOV 50H,00H MOV 51H,00H MOV 52H,00H MOV R0,50H CLR 。 有鍵按下 MOV R5,KEYBUF 。 LJMP DK1A NOKEY2: MOV P3,0FFH CLR MOV A,P3 ANL A,0FH XRL A,0FH 11 JZ NOKEY3 LCALL DELY10MS MOV A,P3 ANL A,0FH XRL A,0FH JZ NOKEY3 MOV A,P3 ANL A,0FH SETB CJNE A,0EH,NK9 MOV KEYBUF,2 LJMP DK1A NK9: CJNE A,0DH,NK10 MOV KEYBUF,6 LJMP DK1A NK10: CJNE A,0BH,NK11 MOV KEYBUF,10 LJMP DK1A NK11: CJNE A,07H,SCA MOV KEYBUF,14 LJMP DK1A NOKEY3: MOV P3,0FFH CLR MOV A,P3 ANL A,0FH XRL A,0FH JZ SCA LCALL DELY10MS MOV A,P3 ANL A,0FH XRL A,0FH JZ SCA MOV A,P3 ANL A,0FH SETB CJNE A,0EH,NK13 MOV KEYBUF,3 LJMP DK1A NK13: CJNE A,0DH,NK14 MOV KEYBUF,7 LJMP DK1A NK14: CJNE A,0BH,NK15 MOV KEYBUF,11 12 LJMP DK1A NK15: CJNE A,07H,SCA MOV KEYBUF,15 LJMP DK1A SCA: JNB ,L1 。等待釋放 ANL A,0FH XRL A,0FH JNZ DK1A NK4: LJMP SCA NOKEY1: 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 SETB CJNE A,0EH,NK5 MOV KEYBUF,1 LJMP DK1A NK5: CJNE A,0DH,NK6 MOV KEYBUF,5 LJMP DK1A NK6: CJNE A,0BH,NK7 MOV KEYBUF,9 LJMP DK1A NK7: CJNE A,07H ,DK1A MOV KEYBUF,13 。鍵盤 SCAN SCAN: MOV P3,0FFH CLR MOV A,P3 ANL A,0FH XRL A,0FH JZ NOKEY1 LCALL DELY10MS MOV A,P3 ANL A,0FH
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鄂ICP備17016276號-1