Chapter 2

Question 1

What is the first step to configure UART in STM32CubeIDE

Answer 1

Enable the UART peripheral in the .ioc file

Question 2

Which pins are commonly used for UART communication?

Answer 2

TX and RX

Question 3

How do you set the baud rate in STM32CubeIDE

Answer 3

Select the desired baud rate in the UART configuration tab.

Question 4

What function is used to send data via UART using the STM32 HAL?

Answer 4

HAL_UART_Transmit()

Question 5

What must be done before receiving data via UART?

Answer 5

Enable the receive interrupt.

Question 6

What function is used to receive data via UART using the STM32 HAL?

Answer 6

HAL_UART_Receive()

Question 7

How can UART data transmission be optimized in STM32CubeIDE?

Answer 7

By using DMA

Question 8

What is the purpose of a parity bit in UART communication?

Answer 8

To detect single-bit errors

Question 9

What does a UART frame error indicate?

Answer 9

The stop bit was not detected

Question 10

How do you enable UART interrupts in STM32CubeIDE?

Answer 10

Enable the UART IRQ in the NVIC settings

Question 11

What is the advantage of using Fast Mode (400 kHz) instead of Standard Mode (100 kHz) for I2C?

Answer 11

Increases communication speed with I2C devices

Question 12

Why is it preferable to disable Clock Stretching (Clock No Stretch Mode = Disabled) in the I2C configuration of the STM32 microcontroller?

Answer 12

Prevents blocking if the slave is not
fast enough

Question 13

Why choose a 7-bit primary address instead of 10-bit for I2C devices?

Answer 13

Most I2C devices use 7-bit addresses

Question 14

Why is the Tlow/Thigh = 2 duty cycle ratio recommended for Fast Mode (400 kHz) I2C communication?

Answer 14

Increases signal stability and reduces communication errors

Question 15

Why is it important to select the correct input channels (IN0, IN1, IN2) when configuring ADC1?

Answer 15

To avoid interference and ensure that the conversion matches the correct sensor

Question 16

Why divide the PCLK2 clock by 4 for ADC1?

Answer 16

To ensure that the sampling frequency
remains within the optimal range recommended by STMicroelectronics

Question 17

Why is the regular conversion set to be software-triggered rather than triggered externally?

Answer 17

Because this allows more flexible control over when the conversion happens

Question 18

Why use a 12-bit resolution for the ADC?

Answer 18

Because a higher resolution provides greater accuracy in analog signal conversion

Question 19

What is the first step to configure I2C in STM32CubeIDE?

Answer 19

Enable the I2C peripheral in .ioc file

Question 20

Which pins are used for I2C communication?

Answer 20

SDA and SCL

Question 21

What must be configured for an STM32 I2C peripheral to function correctly?

Answer 21

Ensure external pull-up resistors are present

Question 22

How do you configure the I2C clock speed in STM32CubeIDE?

Answer 22

By setting the I2C clock in the .ioc file

Question 23

What is the default addressing mode for I2C in STM32CubeIDE?

Answer 23

7-bit addressing

Question 24

What function is used to send data via I2C in STM32 HAL?

Answer 24

HAL_I2C_Master_Transmit()

Question 25

What must be done before reading data from an I2C slave?

Answer 25

Send a START condition

Question 26

What function is used to read data from an I2C slave in STM32 HAL?

Answer 26

HAL_I2C_Master_Receive()

Question 27

What is the role of the ACK bit in I2C communication?

Answer 27

It is used to indicate a successful byte reception

Question 28

How do you configure an STM32 as an I2C slave in STM32CubeIDE?

Answer 28

Set the slave address in the .ioc file

Question 29

What is the resolution of an ADC?

Answer 29

The number of binary bits in ADC output

Question 30

What is the quantization error in an ADC?

Answer 30

The difference between the actual and the closest digital representation

Question 31

What is the function of an ADC sampling rate?

Answer 31

Determines how often an analog signal is converted into digital form

Question 32

What is the advantage of a Successive Approximation Register (SAR) ADC?

Answer 32

Performs conversions quickly with moderate resolution

Question 33

Which factor affects ADC sampling time?

Answer 33

The number of bits in the ADC

Question 34

What is the purpose of the ADC analog watchdog?

Answer 34

Detects if the voltage input is outside predefined limits and generates an interrupt

Question 35

What is the first step to configure an ADC in STM32CubeIDE?

Answer 35

Enable the ADC peripheral in the .ioc file

Question 36

Which pin configuration mode is used for an ADC input in STM32CubeIDE?

Answer 36

Analog mode

Question 37

What function is used to start an ADC conversion in STM32 HAL?

Answer 37

HAL_ADC_Start()

Question 38

What must be configured to use ADC with DMA in STM32CubeIDE?

Answer 38

Enable ADC and DMA in .ioc, and link them