基于at89s52單片機的交通燈設計-資料下載頁
2025-01-18 14:34本頁面
【正文】 : PUSH DPH 。保護DPTR內容 PUSH DPL PUSH ACC PUSH PSW CLR RS0 SETB RS1 MOV R1, 78H MOV R5, 08H MOV R2, 0FEHDISP1: MOV A, @R1 MOV DPTR, TAB MOVC A, @A+DPTR MOV P0, A MOV P2, R2 LCALL DL MOV A, R2 RL A MOV R2, A INC R1 DJNZ R5, DISP1DISP2: POP PSW POP ACC POP DPL POP DPH RET。*************************顯示處理5秒鐘處理程序************************************KK0: MOV DPTR, KKK MOV R4, 08H MOV R0, 7FH MOV R6, 60G1: CLR A MOVC A, @A+DPTR MOV @R0, A DEC R0 INC DPTR DJNZ R4, G1KK3: MOV A, R3 MOV B, 10 DIV AB MOV 7DH, A MOV 7CH, BKK4: MOV A, R5 MOV B, 10 DIV AB MOV 79H, A MOV 78H, BLS: LCALL DISP DJNZ R6, LS RET 。**********************復位程序***************************** FUWEI: MOV P2, 7FH 。位控 MOV P0, 0CH 。段控顯示P. RET。***********************鍵掃程序*****************************KEYK: LCALL KEYSAO JZ EXTI LCALL DELAY LCALL KEYSAO JZ EXTI MOV B, 20HPSF: LCALL KEYSAO JZ EXTI1 LCALL DELAY LJMP PSFEXTI1: MOV 20H, B EXTI: RETKEYSAO: PUSH PSW SETB RS0 MOV A, P1 。將P1口內容送A CPL A MOV 20H, A 。按鍵值保存 POP PSW RET。*********************制表區(qū)**********************************************KKK: DB 10,10,6,0,10,10,6,0 TAB: DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H,0FFH,0CH。*********************延時區(qū)*****************************************DELAY: MOV R2, 10DL0: MOV R3, 0FFHLLL1: NOP NOP DJNZ R3, LLL1 DJNZ R2, DL0 RET DL: MOV R7, 02HDL1: MOV R6, 0FEHDL2: DJNZ R6, DL2 DJNZ R7, DL1 RET END 17
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鄂ICP備17016276號-1