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TLOW EQU 0F0H THIGH EQU 0D8H FLAG_DIR BIT 20H.0;FANGXIANG COUNT_INT DATA 30H COUNT_K DATA 31H LEDVALUE DATA 32H COUNT_KEY DATA 33H KEY0 EQU P2.0 KEY1 EQU P2.1 KEY2 EQU P2.2 KEY3 EQU P2.3 ;-------------------------------------------------- ORG 0000H JMP MAIN ORG 0BH JMP T0_INT ;-------------------------------------------------- MAIN: MOV SP,#60H CALL INIT_TIMER SETB TR0 CLR FLAG_DIR MOV LEDVALUE,#01H MOV COUNT_KEY,#50 MOV COUNT_K,#50 MAIN_LOOP: READKEY0: JB KEY0,READKEY1 JNB KEY0,$ SETB FLAG_DIR AJMP READKEYEND READKEY1: JB KEY1,READKEY2 JNB KEY1,$ CLR FLAG_DIR AJMP READKEYEND READKEY2: JB KEY3,READKEY3 JNB KEY3,$ CLR C MOV A,COUNT_KEY ADDC A,#5 JNC COUNT_KEY_NOT_OV MOV A,#250 COUNT_KEY_NOT_OV: MOV COUNT_KEY,A MOV COUNT_K,A AJMP READKEYEND READKEY3: JB KEY2,READKEYEND JNB KEY2,$ MOV A,COUNT_KEY SUBB A,#5 JNC COUNT_KEY_NOT_OV2 MOV A,#5 COUNT_KEY_NOT_OV2: MOV COUNT_KEY,A MOV COUNT_K,A AJMP READKEYEND READKEYEND: ; MOV A,COUNT_KEY ; MOV COUNT_K,A JMP MAIN_LOOP ;;------------------------- ;;------------------------- INIT_TIMER: ;初始化定時器 MOV TMOD,#01H ;設置定時器0 工作模式為模式1 MOV IE, #82H ;啟用定時器0 中斷產生 MOV TL0,#TLOW ;10MS MOV TH0,#THIGH RET ;;------------------------- T0_INT: PUSH ACC PUSH PSW MOV TL0,#TLOW MOV TH0,#THIGH INC COUNT_INT MOV A,COUNT_INT CJNE A,#1,RUNOUT MOV COUNT_INT,#0 DJNZ COUNT_K,RUNOUT MOV A,COUNT_KEY MOV COUNT_K,A RUN: JB FLAG_DIR,RUN_R; RUN_L: MOV A,LEDVALUE RL A MOV LEDVALUE,A AJMP RUNOUT RUN_R: MOV A,LEDVALUE RR A MOV LEDVALUE,A AJMP RUNOUT RUNOUT: ; MOV A,LEDVALUE MOV P0,LEDVALUE T0_T: POP PSW POP ACC RETI ;;------------------------- END |
