;Experiment 3      Chris Annis

.EQU    TIMER,  00H
.EQU    COUNT,  30H
        MOV     COUNT,  #00H    ;CLEAR COUNT VALUE
        MOV     TMOD,   #01H	;TIMER0 MODE1
DIG1:   MOV     A,      COUNT
        ADD     A,      #01H
        DA      A		;DECIMAL ADJUST
        MOV     COUNT,  A
        MOV     P1,     A
        
	SETB	P3.0

         ;----STOP-----		;This will stop the
HOLD1:  SETB    P2.0		;counting when port 2.0
	JNB     P2.0,   HOLD1	;is attached to 5 volts 
        MOV     P1,     A
         ;-------------

         ;----1 SECOND DELAY----
        MOV     TIMER,  #05H
DA1:    MOV     TL0,    #00H    ;.22 SEC
        MOV     TH0,    #00H
        SETB    TR0             ;START
DB1:    JNB     TF0,    DB1
        CLR     TF0
        CLR     TR0
        DJNZ    TIMER,  DA1     ;5 TIMES
         ;----------------------

	CLR	P3.0

	MOV     A,      COUNT
        ADD     A,      #01H
	DA      A		;DECIMAL ADJUST
        MOV     COUNT,  A
        MOV     P1,     A
        
        SETB	P3.1

         ;----STOP-----		;This will stop the
HOLD1:  SETB    P2.0		;counting when port 2.0
        JNB     P2.0,   HOLD1	;is attached to 5 volts 
        MOV     P1,     A
         ;-------------

         ;----1 SECOND DELAY----
        MOV     TIMER,  #05H
DC1:    MOV     TL0,    #00H    ;.22 SEC
        MOV     TH0,    #00H
        SETB    TR0             ;START
DD1:    JNB     TF0,    DD1
        CLR     TF0
        CLR     TR0
        DJNZ    TIMER,  DC1     ;5 TIMES
         ;----------------------

	CLR	P3.1

         ;----STOP-----		;This will stop the
HOLD1:  SETB    P2.0		;counting when port 2.0
        JNB     P2.0,   HOLD1	;is attached to 5 volts
        MOV     P1,     A
         ;-------------

        SJMP    DIG1
        .END