SPI library usage in Arduino - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize SPI communication.

Arduino

#include <SPI.h>

void setup() {
  SPI.[1]();
}

void loop() {
  // Your code here
}

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

Aopen

Bbegin

Cinit

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using start() or init() instead of begin().

The SPI.begin() function initializes the SPI bus and must be called before using SPI communication.

2fill in blank

medium

Complete the code to send a byte of data over SPI.

Arduino

byte data = 0x42;
SPI.[1](data);

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Atransfer

Bsend

Cwrite

DwriteByte

Attempts:

3 left

💡 Hint

Common Mistakes

Using send() or write() which are not SPI library functions.

The SPI.transfer() function sends a byte and simultaneously receives a byte over SPI.

3fill in blank

hard

Fix the error in setting the SPI clock divider to 16.

Arduino

SPI.[1](SPI_CLOCK_DIV16);

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AsetClockDivider

BclockDivider

CsetClock

DsetClockSpeed

Attempts:

3 left

💡 Hint

Common Mistakes

Using clockDivider() or setClock() which do not exist.

The correct function to set the SPI clock speed divider is setClockDivider().

4fill in blank

hard

Fill both blanks to set SPI data mode and bit order.

Arduino

SPI.[1](SPI_MODE0);
SPI.[2](MSBFIRST);

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

AsetDataMode

BsetBitOrder

CsetClockDivider

DbeginTransaction

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing setClockDivider() with data mode or bit order functions.

setDataMode() sets the SPI mode (clock polarity and phase), and setBitOrder() sets the bit order (MSB or LSB first).

5fill in blank

hard

Fill all three blanks to start an SPI transaction with settings.

Arduino

SPI.[1](SPISettings(4000000, [2], [3]));

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

AbeginTransaction

BMSBFIRST

CSPI_MODE0

DendTransaction

Attempts:

3 left

💡 Hint

Common Mistakes

Using endTransaction() instead of beginTransaction() to start.

beginTransaction() starts an SPI transaction with specified settings: clock speed, bit order, and data mode.