Interrupt enable and disable in ARM Architecture - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable interrupts in ARM architecture.

ARM Architecture

CPSIE [1]

Drag options to blanks, or click blank then click option'

AE

BF

CA

DI

Attempts:

3 left

💡 Hint

Common Mistakes

Using CPSIE F instead of CPSIE I

Confusing enable with disable instructions

The CPSIE I instruction enables IRQ interrupts by clearing the I bit in the CPSR register.

2fill in blank

medium

Complete the code to disable fast interrupts (FIQ) in ARM architecture.

ARM Architecture

CPSID [1]

Drag options to blanks, or click blank then click option'

AF

BI

CA

DE

Attempts:

3 left

💡 Hint

Common Mistakes

Using CPSID I instead of CPSID F

Mixing up enable and disable instructions

The CPSID F instruction disables FIQ interrupts by setting the F bit in the CPSR register.

3fill in blank

hard

Fix the error in the code to enable both IRQ and FIQ interrupts.

ARM Architecture

CPSIE [1]

Drag options to blanks, or click blank then click option'

AIF

BI

CF

DA

Attempts:

3 left

💡 Hint

Common Mistakes

Using CPSIE A which only affects asynchronous aborts (A bit)

Using only CPSIE I or CPSIE F to enable both

The CPSIE IF instruction enables both IRQ and FIQ interrupts by clearing the I and F bits in the CPSR register.

4fill in blank

hard

Fill both blanks to disable IRQ and FIQ interrupts respectively.

ARM Architecture

CPSID [1]
CPSID [2]

Drag options to blanks, or click blank then click option'

AI

BF

CA

DE

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same letter for both blanks

Using CPSIE instead of CPSID to disable interrupts

Use CPSID I to disable IRQ and CPSID F to disable FIQ interrupts.

5fill in blank

hard

Fill all three blanks to enable IRQ interrupts, disable FIQ interrupts, and enable asynchronous aborts respectively.

ARM Architecture

CPSIE [1]
CPSID [2]
CPSIE [3]

Drag options to blanks, or click blank then click option'

AF

BI

CA

DE

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up enable and disable instructions

Using wrong letters for IRQ and FIQ

CPSIE I enables IRQ interrupts by clearing the I bit, CPSID F disables FIQ interrupts by setting the F bit, and CPSIE A enables asynchronous aborts by clearing the A bit in the CPSR register.