Write an ARM assembly program to turn on all colors in the on-board RGB LED. What is the color? ; program to drive red LED onSYSCTRL_BASESYSCTRL_RCGCGPIO_OFFSETGPIO PORTF_BASEGPIO_DIR_OFFSETGPIO_GPIOPDR_OFFSETGPIO_GPIODEN_OFFSETGPIO_DATA_OFFSETmainEXPORTEQU 0x400FE000EQU 0x608EQU 0x40025000EQU 0x400EQU 0x514EQU Øx51CEQU 0x8mainPROC; system controller base address (p. 231); GPIO run mode clock gating control offset registerMOVSTR; port F base address (p. 658); direction offsetAREA lab2, CODE, READONLYENTRY; pull down select offset; digital enable offset; page 654; enable clock on GPIO PORT FLDRLDRr0, =SYSCTRL_BASEr1, =SYSCTRL_RCGCGPIO_OFFSETr2, #0x20r2, [ro, r1] EXIT; set GPIO PORTF Pin 1 (GPF1) to outputr0, =GPIO PORTF_BASEr1, GPIO_DIR_OFFSETr2, #0x2r2, [ro, r1]LDRLDRMOVSTR; selecting a pull-down resistor GPF1LDRr1, GPIO_GPIOPDR_OFFSETr2, [re, r1]STR; enable digital output for GPF1LDRSTR; turn on led at GPF1MOVLDRORRSTRBr1, =GPIO_GPIODEN_OFFSETr2, [re, r1]ENDPENDr2, #0x2r1, GPIO_DATA_OFFSETr1, r2, LSL #2r2, [re, r1]EXIT

An ARM assembly program is a computer program written in the ARM assembly language. ARM assembly…

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Write an ARM assembly program to turn on all colors in the on-board RGB LED. What is the color?

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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

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Concept explainers

Types of input and output devices

Input-output devices help in the functioning of a computer. An input device lets the user enter data into a computer. Common types of input devices are mouse, keyboard, joystick, and microphone.

Question

Write an ARM assembly program to turn on all colors in the on-board RGB LED. What is the color?

; program to drive red LED on
SYSCTRL_BASE
SYSCTRL_RCGCGPIO_OFFSET
GPIO PORTF_BASE
GPIO_DIR_OFFSET
GPIO_GPIOPDR_OFFSET
GPIO_GPIODEN_OFFSET
GPIO_DATA_OFFSET
main
EXPORT
EQU 0x400FE000
EQU 0x608
EQU 0x40025000
EQU 0x400
EQU 0x514
EQU Øx51C
EQU 0x8
main
PROC
; system controller base address (p. 231)
; GPIO run mode clock gating control offset register
MOV
STR
; port F base address (p. 658)
; direction offset
AREA lab2, CODE, READONLY
ENTRY
; pull down select offset
; digital enable offset
; page 654
; enable clock on GPIO PORT F
LDR
LDR
r0, =SYSCTRL_BASE
r1, =SYSCTRL_RCGCGPIO_OFFSET
r2, #0x20
r2, [ro, r1]

EXIT
; set GPIO PORTF Pin 1 (GPF1) to output
r0, =GPIO PORTF_BASE
r1, GPIO_DIR_OFFSET
r2, #0x2
r2, [ro, r1]
LDR
LDR
MOV
STR
; selecting a pull-down resistor GPF1
LDR
r1, GPIO_GPIOPDR_OFFSET
r2, [re, r1]
STR
; enable digital output for GPF1
LDR
STR
; turn on led at GPF1
MOV
LDR
ORR
STR
B
r1, =GPIO_GPIODEN_OFFSET
r2, [re, r1]
ENDP
END
r2, #0x2
r1, GPIO_DATA_OFFSET
r1, r2, LSL #2
r2, [re, r1]
EXIT

Process by which instructions are given to a computer, software program, or application using code.

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