The Digital to Analogue converter DAC writer

Thu May 16, 2013 3:41 pm

The Digital to Analogue Converter

Code:: TITLE "Write DAC" liat p = 16f877 include <pl6f877.inc> DELAY_LO EQU H'30' COUNT EQU H'32' ORG H'00' NOP GOTO START ;THE ROUTINES START HERE ORG 0x20 START BCF STATUS,RP0 ;BANK 0 CLRF PORTD ;-INITIALIZE PORTC By CLEARING OUTPJT 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 PORTB CALL DELAY CALL DELAY INCF COUNT ;COUNT = COUNT + 1 GOTO MAIN ;SUBROUTINES DELAY MOVLW 0X01; SET DELAY TIME MOVWF DELAY_LO WAIT INCFSZ DELAY_LO,1; COUNT DOWN GOTO WAIT RETURN END