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
The 486 Introduced in the year 1989 the 80486 did not feature any radically new processor technology. Instead, it joints a 386 processor, a cache memory controller and a math c

1. Write an assembly program that adds the elements in the odd indices of the following array. Use LOOP. What is the final value in the register? array1 DWORD 10, 20, 30, 40, 50, 6

Instruction Formats A machine language instruction format has 1 or more number of fields linked with it. The first field is known as operation code field or op code field, whic

ROR : Rotate Right without Carry: This instruction rotates the contents of destination operand to the bit-wise right either by one or by the count specified in register CL, exclud

Instruction set of 8086 : The 8086/8088 instructions are categorized into the following major types. This section describes the function of each of the instructions with approp

DMA DMA stands for Direct Memory Access It is uses same Address/Data lines on ISA bus It controls the ISA bus instead of the processor ("bus master") Floppy

Problems: 1. Write a single program. Each of the problems (2-4) should be written within a procedure. Your “main” procedure should call each procedure. Before calling each proc

How to define procedures?

DMA controller :     Steps include in transferring a block of data from I/O devices (for example a disk) to memory: 1. CPU sends a signal to initiate disk transfe

Write a program to merge two sorted arrays to create a third sorted array containing all values from the two original arrays. Merge is a key component to the mergesort algorithm.