How to make count up 00 to 99 using 7 Segment Display

 

This is my project subject microcontroller and i want to share for who want to try it or make assignment about this. I have tuning this program assembly when click pattern it will increment and when click stop button it reset to 00.

Firstly , I made a schematic circuit in Proteus and  write program in Keil Uvision3 and perform simulation.You can see circuit that i have make.If your simulation going ok you can make circuiT.

IMPORTANT: ANY CONNECTION SHOULD FOLLOW THE SCHEMATIC DIAGRAM TO AVOID THE COMPONENTS FROM DAMAGE. 

Circuit 

Assembly Program 

       Org    00H

        data_one    equ    P3

        data_ten    equ    P2

    IPIN        EQU    P1.0

    DPIN        EQU    P1.1

        Mynumber    Equ    30H 

main_prog:  

    CALL INIT

AGAIN:

AG2:    JB IPIN,AG1

    CALL DELAY1    ;debounce

    JB IPIN,AG1

    JNB IPIN,$    ;wait till switch release

    INC MYNUMBER

    mov a,mynumber

    cjne a,#100,pq1

    mov mynumber,#0

pq1:

    call bcd    ;diaplay data

AG1:    JB DPIN,AG2

    CALL DELAY1

    JB DPIN,AG2

    JNB DPIN,$   

    clr mynumber     

    mov a,#0C0H

    cjne a,#0C0H,pq2

    mov mynumber,#00

pq2:

    call bcd

    JMP AGAIN

INIT:

    MOV    data_ten,#0C0H

        MOV    data_one,#0c0H

        mov    Mynumber,#0

        mov    p1,#255        ;set port 1 as input BY . IT SHOULD BE 1

RET

DELAY1:    MOV R4,#255

    DJNZ R4,$

RET

   

BCD:    Mov     A,Mynumber

        Mov     B,#10

        Div    AB    

    mov dptr,#seg_conv 

    MOVC A,@A+DPTR    ; MOVE DATA @A+DPTR IN A     

        mov    data_ten, A  

        mov    A,B

        mov dptr,#seg_conv 

    MOVC A,@A+DPTR    ; MOVE DATA @A+DPTR IN A     

        mov    data_one, A  

Ret

delay:  MOV    R5,#0ffh

        MOV    R6,#0ffH

        MOV    R7,#2

delay_loop:    DJNZ    R5,delay_loop

        DJNZ    R6,delay_loop

        DJNZ    R7,delay_loop

        RET

    

Seg_conv:  

    DB    0C0H    ; 0

        DB    0F9H    ; 1

        DB    0A4H    ; 2

        DB    0B0H    ; 3

        DB    099H    ; 4

        DB    092H    ; 5

        DB    082H    ; 6

        DB    0F8H    ; 7

        DB    080H    ; 8

        DB    090H    ; 9

        END