單片機課程設(shè)計說明書-基于at89s52單片機的數(shù)字倒計時器設(shè)計-文庫吧在線文庫
【正文】 K2 JNC STOP2 SETB RET XIAOZHEN3: LCALL DISPLAY1 JB K4， XIAOZHEN3 MOV C, K4 JC XIAOZHEN3 LCALL DELAY MOV C, K4 單片機課程設(shè)計說明書 JC XIAOZHEN3 STOP3: MOV C, K4 JNC STOP3 LCALL DELAY MOV C, K4 JNC STOP3 SETB RET XIAOZHEN4: LCALL DISPLAY1 JB K2， XIAOZHEN4 MOV C, K2 JC XIAOZHEN4 LCALL DELAY MOV C, K2 JC XIAOZHEN4 STOP4: MOV C, K2 JNC STOP4 LCALL DELAY MOV C, K2 JNC STOP4 SETB RET XIAOZHEN5: LCALL DISPLAY1 JB K3， XIAOZHEN5 MOV C, K3 單片機課程設(shè)計說明書 JC XIAOZHEN5 LCALL DELAY MOV C, K3 JC XIAOZHEN5 STOP5: MOV C, K3 JNC STOP5 LCALL DELAY MOV C, K3 JNC STOP5 SETB RET XIAOZHEN6: LCALL DISPLAY2 JB K3, XIAOZHEN6 MOV C, K3 JC XIAOZHEN6 LCALL DELAY MOV C, K3 JC XIAOZHEN6 STOP6: MOV C, K3 JNC STOP6 LCALL DELAY MOV C, K3 JNC STOP6 SETB RET 單片機課程設(shè)計說明書 XIAOZHEN7: LCALL DISPLAY2 JB K1, XIAOZHEN7 MOV C, K1 JC XIAOZHEN7 LCALL DELAY MOV C, K1 JC XIAOZHEN7 STOP7: MOV C, K1 JNC STOP7 LCALL DELAY MOV C, K1 JNC STOP7 SETB RET DELAY: MOV R4, 14H DL00: MOV R5, OFFH DL11: DJNZ R5, DL11 DJNZ R4, DL00 RET TIME: PUSH ACC PUSH PSW MOVTH0, 03CH MOV TL0, 0B0H DJNZ R2, RET0 MOV R2, 14H 單片機課程設(shè)計說明書 MOV A, 20H CLR C DEC A CJNE A, 0, G01 MOV 20H, 3CH MOV 30H, 0 MOV 31H, 0 MOV A, 21H DEC A CJNE A, 3CH, G02 MOV 21H, 0H MOV 32H, 0 MOV 33H, 0 MOV A, 22H DEC A CJNE A, 18H， GO3 MOV 22H, 00H MOV 34H, 0 MOV 35H, 0 AJMP RETO GO1: MOV 20H, A MOV B, 0AH DIV AB MOV 31H, A MOV 30H, B 單片機課程設(shè)計說明書 AJMP RETO GO2: MOV 21H, A MOV B, 0AH DIV AB MOV 33H, AEEH MOV 32H, B AJMP RETO GO3: MOV 22H, A MOV B, OAH DIV AB MOV 35H, A MOV 34H, B AJMP RETO RETO: POP PSW POP ACC RETI DISPLAY1: MOV R0, 30H MOV R3, 0EEH MOV A, R3 PLAY1: MOV P2, A MOV A,RO MOV DPTR, DSEG1 MOVC A,A + DPTR MOV P0, A LCALL DL1 單片機課程設(shè)計說明書 MOV P2, 0EEH MOV A, R3 RL A JNB , LD1 INC R0 MOV R3, A LJMP PLAY1 LD1: RET DISPLAY2: PUSH ACC
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鄂ICP備17016276號-1