Code for reading flow & generating led output, Assembly Language

Code for Reading Flow & Generating LED Output

The code starts with the scanning of the PORT 3, for reading the flow status to check for various flow conditions and compare to start subroutines for respective flow. The overflow conditions are checked in respective subroutines for LED driving i.e. In flash mode or continuous, the LED are L1, L2, L3 & L4 are used for various combinations.

The details of program code are below:-

MOV P3 , #0FFH ; Define Port 3 as input port

START : MOV A ,P3

      MOV  A ,P3

    ANL A, #1Ch   ;  Masking of    BITs FLOW RATE

    ACALL FLOW00     ;  FLOW RATE 0  SUBROUTINE 

    ACALL FLOW01 ;  FLOW RATE 1  SUBROUTINE

    ACALL FLOW02 ;  FLOW RATE 2  SUBROUTINE

    ACALL FLOW03;  FLOW RATE 3 SUBROUTINE

    ACALL FLOW04;  FLOW RATE 4  SUBROUTINE

     ACALL FLOW05;  FLOW RATE 5  SUBROUTINE

     ACALL FLOW06 ;  FLOW RATE 6  SUBROUTINE

     ACALL FLOW07 ;  FLOW RATE 7  SUBROUTINE

     SJMP   START 

; FLOW RATE   SUBROUTINES SECTION

FLOW00 :    CJNE  A,#00H ,  NEXT0       ;  FLOW RATE   0

MOV A, P3

ANL A,#20h

CJNE A ,#00H ,  FLOWOV      ; LED 1   FLASHING 1Hz

SETB P1.0 ;  LED 1 ON

ACALL DELAY   ;   500ms   DELAY   

CLR P1.0    ; LED 1 OFF

ACALL DELAY   ; 500ms   DELAY

RET

FLOWOV :  

SETB P1.0     ; LED 1 ON  ( 0 HZ)

NEXT0 : RET

FLOW01:    CJNE  A ,#04H  ,  NEXT1       ; FLOW RATE   1

MOV A, P3

ANL A,#20h

CJNE A ,#00H ,  FLOWOV1

SETB P1.0 ;  LED 1 ON

ACALL DELAY   ;   500ms   DELAY   

CLR P1.0    ; LED 1 OFF

ACALL DELAY   ; 500ms   DELAY

RET

FLOWOV1 :  

SETB P1.0     ; LED 1 ON ( 0 HZ)

NEXT1 :RET

 ;    SUBROUTINE FLOW RATE   2

FLOW02:    CJNE  A,#08H ,  NEXT2       ; FLOW RATE   2

MOV A, P3

ANL A,#20h

CJNE A ,#00H ,  FLOWOV2  ; 

MOV P1 ,#03H   ; LED 1 , LED 2  ON     FLASHING 1 Hz

ACALL DELAY   ;   500ms   DELAY

MOV P1 ,#00H   ; LED 1 , LED 2   OFF

ACALL DELAY ; 500ms   DELAY

RET

FLOWOV2 :  

MOV P1 ,#03H   ; LED 1 , LED 2  ON

NEXT2  : RET

  ;  SUBROUTINE FLOW RATE   3

;    SUBROUTINE FLOW RATE   4

;     SUBROUTINE FLOW RATE   5

;     SUBROUTINE FLOW RATE   6

;    SUBROUTINE FLOW RATE   7

 

Posted Date: 3/5/2013 5:07:21 AM | Location : United States







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