SPI with display modules in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the SPI library for Raspberry Pi.

Raspberry Pi

import [1]

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Agpiozero

Bspidev

CRPi.GPIO

Dtime

Attempts:

3 left

💡 Hint

Common Mistakes

Importing gpiozero instead of spidev

Using RPi.GPIO which is for general GPIO, not SPI

The spidev library is used to control SPI devices on Raspberry Pi.

2fill in blank

medium

Complete the code to open SPI bus 0, device 0.

Raspberry Pi

spi = spidev.SpiDev()
spi.[1](0, 0)

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Aconnect

Binit

Cstart

Dopen

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'connect' which is not a spidev method

Using 'init' which does not exist in spidev

The open method opens the SPI bus and device for communication.

3fill in blank

hard

Fix the error in the code to send data [0xAA, 0xBB] over SPI.

Raspberry Pi

data = [0xAA, 0xBB]
spi.[1](data)

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Awritebytes

Bwrite

Csend

Dtransfer

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'send' which is not a spidev method

Using 'transfer' which sends and receives data

The writebytes method sends a list of bytes over SPI without reading response.

4fill in blank

hard

Fill both blanks to set SPI max speed to 1 MHz and mode to 0.

Raspberry Pi

spi.max_speed_hz = [1]
spi.mode = [2]

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A1000000

B0

C1

D500000

Attempts:

3 left

💡 Hint

Common Mistakes

Setting mode to 1 instead of 0

Using 500000 for max speed instead of 1000000

SPI max speed is set in Hz, so 1 MHz is 1000000. Mode 0 means clock polarity and phase are zero.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps each byte in data to its hex string if byte is greater than 0x80.

Raspberry Pi

result = [1]: hex([2]) for [3] in data if [2] > 0x80

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Abyte

Bb

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names for key and iteration variable

Not converting byte to hex string

The dictionary comprehension uses b as key, b as value after converting to hex, and iterates with b over data.