Standby mode behavior in Embedded C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enter standby mode.

Embedded C

void enter_standby() {
    [1]();
}

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

Aenable_standby

Benter_standby_mode

Cstandby_mode_enable

Dstandby_enter

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function that only enables standby but does not enter it.

Confusing enabling with entering standby mode.

The function enter_standby_mode() is used to put the device into standby mode.

2fill in blank

medium

Complete the code to clear the standby flag after waking up.

Embedded C

void clear_standby_flag() {
    [1](STANDBY_FLAG);
}

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

Aflag_clear

Breset_flag

Cclear_flag

Dremove_flag

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function that resets all flags instead of clearing a specific one.

Using a function that does not exist in the API.

The function clear_flag() is used to clear specific flags like the standby flag.

3fill in blank

hard

Fix the error in the code to correctly configure the wakeup source before standby.

Embedded C

void configure_wakeup() {
    [1](WAKEUP_PIN);
}

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

Aenable_wakeup_source

Bwakeup_enable_source

Cset_wakeup_pin

Dactivate_wakeup

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function that sets the pin but does not enable the wakeup source.

Using a function name that is not part of the standard API.

The correct function to enable a wakeup source is enable_wakeup_source().

4fill in blank

hard

Fill both blanks to correctly check and clear the standby flag after wakeup.

Embedded C

if ([1](STANDBY_FLAG)) {
    [2](STANDBY_FLAG);
}

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

Ais_flag_set

Bclear_flag

Ccheck_flag

Dreset_flag

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same function for both checking and clearing.

Using functions that do not exist or have wrong parameters.

Use check_flag() to test if the standby flag is set, then clear_flag() to clear it.

5fill in blank

hard

Fill all three blanks to create a dictionary mapping wakeup pins to their status after standby.

Embedded C

wakeup_status = {{BLANK_4}}: [2] for [3] in wakeup_pins if check_flag([3])

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

Apin

Bget_pin_status()

Ddict

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently.

Not calling the function to get pin status properly.

This dictionary comprehension maps each pin to its status using get_pin_status() for pins where check_flag(pin) is true.