; TUTA12.ASM 11MAR02; using 5 switches on Port A, showing their status on Port B

;:::::::::::::::::::::::::::::::::::::::::::::::::::::: ; Configuration data ; PICmicro MCU type: 16F84 ; Oscillator: RC mode, fast, VR1 your choice of setting ; LCD display: off ; 7-segment display: off ; Version 2 board settings: J14 links: Digital ;:::::::::::::::::::::::::::::::::::::::::::::::::::::: ;; The following line embeds configuration data into the PICmicro

__CONFIG H'3FFB' ; RC mode;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

#DEFINE PAGE0 BCF STATUS,5#DEFINE PAGE1 BSF STATUS,5

STATUS EQU H'03' ;TRISA EQU H'85' ;PORTA EQU H'05' ;TRISB EQU H'86' ;PORTB EQU H'06' ;W EQU 0 ;

ORG 0 ; Reset vectorGOTO 5 ; Goto start of programORG 4 ; Interrupt vectorGOTO 5 ; Goto start of programORG 5 ; Start of program memory

CLRF PORTB ;PAGE1 ;MOVLW B'00011111' ; all PORTA as inputMOVWF TRISA ;CLRF TRISB ;PAGE0 ;

LOOP MOVF PORTA,W ; get value of PORTAANDLW B'00011111' ; ANDED with binary 11111 so

that only; first 5 bits of 8-bit value in

W; have any effect

MOVWF PORTB ; set Port B to the value of Port A

GOTO LOOP ; the loop is repeated endlessly

END ; final statement