Code for reading flow & generating serial output, Assembly Language

Assembly Code for Reading Flow & Generating Serial Output

The timer is timer 1 is set for the baud rate 9600, as the crystal used is of 11.0592 Hz.  Then the timer 1 is started by TR1. The program checks the ASCII switch, flow status pins and the respective flow subroutine starts and in the flow subroutine the overflow status is   checked as well as the MOV B ,#X   where X is the character used to be displayed in PC  is used to stored in the register B.  The subroutines returns and the Serial transmission routine is called for serial transmission. In serial transmission subroutine the status of 79H is checked if found enabled then the value of B is transferred in SBUF and followed by character 'L' to SBUF.

The details assembly code is as below:-

         ; Define value setting for Timer in using Generate Baud Rate in transfer data.     

                    MOV IE,#00000000B

                     MOV TMOD,#00100000B

                     MOV TL1,#0FDH

                     MOV TH1,#0FDH

                ; Define value setting for SCON Register that select mode 1

                     MOV SCON,#01010000B

                     SETB TR1  

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

 START  : MOV A ,P3

 ANL A, #80h   ;  Masking of    BITs except P3.7

 CJNE  A ,#00h ,   OVER       ; TO CHECK THE  ASCII  SWITCH 

               CPL 79H     ;   

               OVER :  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

     JB   79H , SKIP     ;  CHECK FOR ENABLED OR DISABLED SERIAL COMMUNICATION

     ACALL STXD    ;     SERIAL DATA COMMUNICATION  TX

    SKIP :  SJMP   START 

; FLOW RATE   SUBROUTINES SECTION

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

MOV B ,#'0'

NEXT0 : RET

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

MOV B ,#'1'

NEXT2  : RET

;  SUBROUTINE FLOW RATE   3

FLOW03:    CJNE  A,#0CH ,  NEXT3       ; FLOW RATE   3

MOV B ,#'3'

NEXT3 :RET

;    SUBROUTINE FLOW RATE   4

FLOW04:    CJNE  A,#10H ,  NEXT4       ; FLOW RATE   4

MOV B ,#'4'

NEXT4 :RET

 

;     SUBROUTINE FLOW RATE   5

FLOW05:    CJNE  A, #14H  ,  NEXT5       ; FLOW RATE   5

MOV B ,#'5' 

Next5 :RET

;     SUBROUTINE FLOW RATE   6

FLOW06:    CJNE  A,#18H ,  NEXT6       ; FLOW RATE   6

MOV B ,#'6'

Next6 :RET

;      SIMILARLY SUBROUTINE FLOW RATE   7

 ;   TRANSMISSION SERIAL  SUBROUTINE STARTS 

STXD :           MOV SBUF,B

                     JNB TI,$

                     CLR TI

                     MOV SBUF,#'L'  ;  Sending L  After the flow Rate

                     JNB TI,$

                     CLR TI

     RET 

 END

Posted Date: 3/5/2013 5:02:52 AM | Location : United States







Related Discussions:- Code for reading flow & generating serial output, Assignment Help, Ask Question on Code for reading flow & generating serial output, Get Answer, Expert's Help, Code for reading flow & generating serial output Discussions

Write discussion on Code for reading flow & generating serial output
Your posts are moderated
Related Questions
LABEL :   The Label directive which is used to assign a name to the current content of the location counter. At the beginning of the assembly process, the assembler start a loca

CMP: Compare: - This instruction compares the source operand, which can be a register or memory location an immediate data with a destination operand that might be a register or a

Write a procedure to read a text file and copy its contents to another text file using 8086 assembly language .

DIV: Unsigned Division:- This instruction performs unsigned division operation. It divides an unsigned word or double word by a 16-bit or 8-bit operand. The dividend might be in t

8086 Minimum mode System and Timing In a minimum mode 8086 system, the microprocessor 8086 is operated in minimum mode by strapping its MN/MX pin to logic 1.All the control si

Write Policy A write policy determines how the cache deals with a write cycle. The 2 common write policies areWrite-Throughand Write-Back. In Write-Back policy, the cache behav

#Write a function to calculate the following arithmetic operation and return the result. A = 2 + (3x)3 + y/2n (x, y and n are arguments of the function where x is an integer in the

(1) Write a program that will: (a) display "Enter Your Name:" (b) convert the entered name to Capital letters (if small), If any other character is entered, the program wil

IRET : Return from ISR:- When an interrupt service routine is called, before transferring control to it, the IP, CS  register and flag registers are stored in the stack to ment