Writing a Counter to any PORT

Writing a counter to a PORT

Code:

TITLE "Write Count to Port D"
list p = 16f877
include <p16f877.inc>
DELAY_VHI EQU H'30'
DELAY_HI EQU H'31'
DELAY_LO EQU H'32'
COUNT EQU H'33'
ORG H'00'
NOP
GOTO START 

ORG 0x20
START BCF STATUS,RP0; BANK 0
CLRF PORTD; INITALIZE PORTC BY CLEARING OUTPUT

DATA LATCHES
BSF STATUS,RP0; SELECT BANK1
MOVLW 0X00;W REG=00
MOVWF TRISD;SET RD AS OUTPUTS
BCF STATUS,RP0; BANK 0
CLRF COUNT; COUNT = 0 

MAIN MOVF COUNT,W; GET COUNT
MOVWF PORTD; OUTPUT W REG TO PORTD
CALL DELAY
CALL DELAY
INCF COUNT; COUNT= COUNT+1
GOTO MAIN

 ; SUBRoUTINES
DELAY  
MOVLW 0X01
MOVWF DELAY_LO
MOVLW 0XA1
MOVWF DELAY_HI
MOVLW 0XFF
MOVWF DELAY_VHI

BIG
OUTER
INNER

INCFSZ DELAY_LO,1
GOTO INNER
INCFSZ DELAY_HI,1
GOTO OUTER
INCFSZ DELAY_VHI
GOTO INNER
RETURN
END

_________________
M. S. Rakha, Ph.D.
Queen's University
Canada

Author: DrRakha
Mastermind

Posts: 2715
Have thanks: 74 time

Page 1 of 1

[ 1 post ]

Related Posts to : Writing a Counter to any PORT
C++ help with writing a program. -
Reading and Writing To text file -
Read XML file content using SAX and writing its as SQL -
Writing a Windows Form Application For .NET Framework Using -
jsp page counter -
File page counter in php -
reset the list counter -
Use cookie to create page counter -
Use cookie to create page counter -
ramp Counter ANALOGUE TO DIGITAL CONVERSION (ADC) -

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
All copyrights reserved to codemiles.com 2007-2011
mileX v1.0 designed by codemiles team
Codemiles.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com