基于at89s51單片機的自動控制電鈴設計與開發(fā)-資料下載頁
2025-06-26 13:16本頁面
【正文】 * 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。*********12MS延時子程序********* T12MS: MOV R6,18H TM1A: MOV R5,0FFH TM1B: DJNZ R5,TM1B DJNZ R6,TM1A RET 。********256MS延時子程序****** T200MS: MOV R6,0ffH TM2A: MOV R5,0FFH TM2B: DJNZ R5,TM2B DJNZ R6,TM2A RET。*****顯示子程序***** XSH: MOV A,04H MOV B,03 MUL AB ADD A,2DH MOV R0,A MOV SBS,@R0 INC R0 MOV SBM,@R0 INC R0 MOV SBH,@R0 DEC R0 DEC R0 MOV A,SBH MOV B,10 DIV AB MOV 7FH,A MOV 7EH,B MOV A,SBM MOV B,10 DIV AB MOV 7DH,A MOV 7CH,B MOV A,SBS MOV B,10 DIV AB MOV 7BH,A MOV 7AH,B MOV R1,7AH MOV DPTR,TAB。******************************* 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。*************************** LOOP21: JNB 05H,LOOP22JB 03H,LOOP22 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 LOOP31 LOOP22: 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 。****************** 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 。Lop: RETTAB:DB 11H,0D7H,32H,92H,0D4H,98H,18H,0D3H,10H,90H END21頁 共 20
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