Raspberry Pi hardware overview (GPIO, USB, HDMI) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set up a GPIO pin as an output on a Raspberry Pi.

Raspberry Pi

import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup([1], GPIO.OUT)

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AGPIO.IN

BGPIO.OUT

C17

DGPIO.BOARD

Attempts:

3 left

💡 Hint

Common Mistakes

Using GPIO.OUT instead of a pin number

Using GPIO.BOARD instead of a pin number

The number 17 refers to the GPIO pin number in BCM mode. This sets pin 17 as an output.

2fill in blank

medium

Complete the code to turn on an LED connected to GPIO pin 18.

Raspberry Pi

GPIO.output([1], GPIO.HIGH)

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A18

B17

CGPIO.HIGH

DGPIO.LOW

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong pin number

Using GPIO.LOW which turns the LED off

Pin 18 is the GPIO pin connected to the LED. Setting it HIGH turns the LED on.

3fill in blank

hard

Fix the error in the code to read the state of a button connected to GPIO pin 23.

Raspberry Pi

button_state = GPIO.input([1])

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AGPIO.OUT

BGPIO.HIGH

CGPIO.IN

D23

Attempts:

3 left

💡 Hint

Common Mistakes

Using GPIO.IN instead of a pin number

Using GPIO.OUT which is for output pins

GPIO.input requires the pin number to read its state. Pin 23 is correct here.

4fill in blank

hard

Fill both blanks to create a dictionary mapping USB port numbers to their status.

Raspberry Pi

usb_status = [1]((port, 'connected' if port [2] [1, 2] else 'disconnected') for port in range(1, 5))

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Adict

Bin

Cnot in

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using list instead of dict

Using 'not in' which reverses the condition

We use dict() to create a dictionary. The 'in' keyword checks if the port is in the list [1, 2].

5fill in blank

hard

Fill all three blanks to create a dictionary of HDMI ports with their resolutions if active.

Raspberry Pi

hdmi_info = [1]: [2] if status [3] 'active' else 'inactive' for [1], status in [('HDMI1', 'active'), ('HDMI2', 'inactive')]}}

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Aport

Bresolution

C==

D'1920x1080'

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' instead of '=='

Using a wrong key name

Using a wrong resolution string

We use 'port' as the key. If status is 'active' (checked with '=='), we assign resolution '1920x1080'.