Struct Watchdog 

pub struct Watchdog<'d> { /* private fields */ }

Code Watchdog peripheral

Implementations

impl<'d> Watchdog<'d>

pub fn new( _peri: Peri<'d, CDOG0>, _irq: impl Binding<CDOG0, InterruptHandler> + 'd, config: Config, ) -> Result<Self>

Creates a new CDOG instance with the given configuration.

Arguments

• _peri - Peripheral ownership token
• _irq - Interrupt binding for CDOG0 interrupt handler
• config - Configuration for fault handling and operational modes

Returns

• Ok(Watchdog) - Successfully configured watchdog
• Err(Error::WatchdogRunning) - Watchdog is already running and cannot be reconfigured

pub fn start(&mut self, instruction_timer_value: u32, secure_counter_value: u32)

Starts the watchdog with specified timer and counter values.

Arguments

• instruction_timer_value - Number of clock cycles before timeout
• secure_counter_value - Initial value of the secure counter

Note

If the watchdog is already running, this will stop it first.

pub fn add(&mut self, add: u32)

Adds a value to the secure counter.

Arguments

• add - Value to add to the secure counter

pub fn sub(&mut self, sub: u32)

Arguments

• sub - Value to subtract from the secure counter

pub fn check(&mut self, check: u32)

Checks the secure counter value and restarts the watchdog.

This stops the watchdog, verifies the secure counter matches the expected value, and restarts with the same instruction timer reload value.

Arguments

• check - Expected secure counter value

Note

If the counter doesn’t match, a miscompare fault may be triggered depending on configuration.

pub fn get_instruction_timer(&self) -> u32

Reads the current instruction timer value.

Returns

Current countdown value of the instruction timer.

pub fn get_secure_counter(&self) -> u32

Returns

The software-tracked secure counter value.

pub fn update_instruction_timer(&mut self, instruction_timer_value: u32)

Updates the instruction timer reload value.

Arguments

• instruction_timer_value - New timeout period in clock cycles

pub fn set_persistent_value(&mut self, value: u32)

Sets a persistent value in the CDOG peripheral.

This value is stored in the 32 bits PERSISTENT register and persist through resets other than a Power-On Reset (POR).

Arguments

• value - The 32-bit value to store in the persistent register

pub fn get_persistent_value(&self) -> u32

Gets the persistent value from the CDOG peripheral.

Returns

The 32-bit value stored in the persistent register