基于at89s51單片機(jī)的自動(dòng)控制電鈴設(shè)計(jì)與開(kāi)發(fā)(文件)
【正文】 DJNZ 15H,BACKB SJMP NO2 SKIP2: DEC R1 MOV A,R1 CJNE A,SBM,GO2 SETB KG SJMP RETN2 NO2: CLR KG RETN2: POP PSW。********256MS延時(shí)子程序****** T200MS: MOV R6,0ffH TM2A: MOV R5,0FFH TM2B: DJNZ R5,TM2B DJNZ R6,TM2A RET。****************** LOOP31: JNB 06H,LOOP32 JB 03H,LOOP32 INC R1 MOV A,0FFH MOV SBUF,A JNB TI,$ CLR TI INC R1 MOV A,0FFH MOV SBUF,A JNB TI,$ CLR TI SJMP LOP LOOP32: INC R1 MOV A,R1 MOVC A,A+DPTR MOV SBUF,A JNB TI,$ CLR TI INC R1 MOV A,R1 MOVC A,A+DPTR MOV SBUF,A JNB TI,$ CLR TI lop: mov a,30h movc a,a+dptr mov sbuf,a jnb ti,$ clr ti 。******************************* JNB 04H,LOOP1 JB 03H,LOOP1 MOV A,0FFH MOV SBUF,A JNB TI,$ CLR TI INC R1 MOV A,0FFH MOV SBUF,A JNB TI,$ CLR TI SJMP LOOP21 LOOP1: MOV A,R1 MOVC A,A+DPTR MOV SBUF,A JNB TI,$ CLR TI INC R1 MOV A,R1 MOVC A,A+DPTR MOV SBUF,A JNB TI,$ CLR TI。******鬧鈴中斷程序*********** DL: PUSH PSW SETB RS1 CLR RS0 MOV TH1,00H MOV TL1,024H INC R7 CJNE R7,08,GODL1 MOV R7,07 INC R6 CJNE R6,07,GODL2MOV R7,00 MOV R6,00 SJMP GO GODL2: SETB FMQ SJMP GO GODL1: CPL FMQ GO: POP PSW RETI。*********中斷程序*********** ZHD: PUSH ACC PUSH PSW SETB RS1 SETB RS0 ACALL XSH MOV TH0,3CH MOV TL0,0B0H INC R5 CJNE R5,08,NEXT1 NEXT: MOV R5,00 CPL 03H NEXT1: INC MS100 MOV A,MS100 CJNE A,20,RETN3 MOV MS100,0 INC S MOV A,S CJNE A,60,RETN3 MOV S,00 INC M MOV A,M CJNE A,60,RETN3 MOV M,0 INC H MOV A,H CJNE A,24,RETN3 MOV H,0 inc 30h mov a,30h cjne a,08,retn3 mov 30h,01。 06H位為1則最前兩位減1 S2S: INC R0 INC R0 DEC R0 CJNE R0,0FFH,NT5 MOV R0,23 SJMP NT5 S2F: INC R0 DEC R0 JB 00,SK602 CJNE R0,0FFH,NT5 MOV R0,23 SJMP NT5 SK602: CJNE R0,0FFH,NT5 MOV R0,59 SJMP NT5 S2A: DEC R0 CJNE R0,0FFH,NT5 MOV R0,59 NT5: JB REST,NT6 ACALL T12MS JB REST,NT6 CLR FMQ JNB REST,
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鄂ICP備17016276號(hào)-1