Answered: Write the code needed to perform the…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write the code needed to perform the following operation and insert it as needed in the program shell below.

Setup Port A, pin 4 as input, with pull up resistor enabled,
Setup Port H, all pins as an outputs,
Continuously read the input on Port A, pin 4
Write to Port H, all pins (all 0s or 1s) the data read from Port A, pin 4 (0 or 1)
Write the code so as to not affect any other port bits or setup

INCLUDE <m2560def.inc>

.DEF TEMP=R16

.CSEG ; The start of the code segment

.ORG 0X0000 ; Set the beginning of code at the reset interrupt vector

RJMP MAIN ;jump to main program from the reset interrupt

MAIN:

LDI TEMP, LOW(RAMEND) ; Setup Stack

OUT SPL, TEMP ; Set SPL to the low byte of RAMEND

LDI TEMP, HIGH(RAMEND) ;

OUT SPH, TEMP ; Set SPH to the high byte of RAMEND

;insert code here

LOOP: ; A continuous loop is an essential

; part of any embedded program

;insert code here

RJMP LOOP ; Start the LOOP over

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