Answers for "8051 elevator lift"

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8051 elevator lift

ORG    00H

MAIN:   
    MOV P1, #00H        ; motor
    MOV P2, #00H        ; buttons P2.0-2.2, sensors P2.3-2.5

FLOOR1: 
    JNB P2.0, FLOOR2        ; check button
    SETB    P1.1            ; start motor to go down
    JNB P2.3, $         ; check sensor, cont until it reaches 1st floor
    CLR P1.1            ; stops motor
    SJMP    MAIN

FLOOR2:
    JNB P2.1, FLOOR3
    JNB P2.3, FLOOR2DOWN    ; check if lift is on floor 1
    SETB    P1.0            ; starts motor upwards
    JNB P2.4, $
    CLR P1.0    
    SJMP    MAIN

FLOOR2DOWN:
    JNB P2.1, FLOOR3
    JNB P2.5, FLOOR2        ; check if lift is on floor 3
    SETB    P1.1
    JNB P2.4, $
    CLR     P1.1
    SJMP    MAIN

FLOOR3:
    JNB P2.2, MAIN      ; check button floor 3
    SETB    P1.0            
    JNB P2.5, $         ; cont until it reaches floor 3
    CLR P1.0

    SJMP    MAIN

END
Posted by: Guest on August-03-2021

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