SPI master-slave architecture in Embedded C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize SPI as master.

Embedded C

SPI_InitTypeDef SPI_Config;
SPI_Config.Mode = [1];
// Other configurations follow

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

ASPI_MODE_MASTER

BSPI_MODE_SLAVE

CSPI_MODE_BIDIRECTIONAL

DSPI_MODE_SIMPLEX

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing slave mode instead of master mode.

The SPI must be set to master mode to control the communication.

2fill in blank

medium

Complete the code to set the SPI clock polarity to idle low.

Embedded C

SPI_Config.CLKPolarity = [1];

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

ASPI_POLARITY_LOW

BSPI_POLARITY_HIGH

CSPI_POLARITY_IDLE_HIGH

DSPI_POLARITY_IDLE_LOW

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing polarity high with idle low.

Idle low means clock polarity low, so use SPI_POLARITY_LOW.

3fill in blank

hard

Fix the error in the SPI data size configuration.

Embedded C

SPI_Config.DataSize = [1];

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

ASPI_DATASIZE_4BIT

BSPI_DATASIZE_16BIT

CSPI_DATASIZE_32BIT

DSPI_DATASIZE_8BIT

Attempts:

3 left

💡 Hint

Common Mistakes

Using unsupported data sizes like 32-bit or 4-bit.

SPI commonly uses 8-bit data size; 32-bit or 4-bit are invalid here.

4fill in blank

hard

Fill both blanks to configure SPI clock phase and NSS management.

Embedded C

SPI_Config.CLKPhase = [1];
SPI_Config.NSS = [2];

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

ASPI_PHASE_1EDGE

BSPI_PHASE_2EDGE

CSPI_NSS_SOFT

DSPI_NSS_HARD_INPUT

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing clock phase edges or using hardware NSS when software is needed.

Clock phase is set to first edge, and NSS is managed by software.

5fill in blank

hard

Fill all three blanks to create a dictionary mapping SPI pins to their functions.

Embedded C

const char* SPI_Pins[] = {"MOSI", "MISO", "SCK"};
const int PinNumbers[] = [1], [2], [3];

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

A7

B6

C5

D8

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up pin numbers or using pins not assigned to SPI.

Common SPI pins are SCK=5, MISO=6, MOSI=7 on many microcontrollers.