MCU-integrated periodic timer implementation. More...

#include <EspPeriodicTimer.h>

Inheritance diagram for EspPeriodicTimer:

Collaboration diagram for EspPeriodicTimer:

Public Member Functions
	EspPeriodicTimer (hf_timer_callback_t callback=nullptr, void *user_data=nullptr) noexcept
	Constructor with callback specification.

	~EspPeriodicTimer () noexcept override
	Destructor - ensures timer is stopped and resources are freed.

	EspPeriodicTimer (const EspPeriodicTimer &)=delete

EspPeriodicTimer &	operator= (const EspPeriodicTimer &)=delete

	EspPeriodicTimer (EspPeriodicTimer &&)=delete

EspPeriodicTimer &	operator= (EspPeriodicTimer &&)=delete

hf_timer_err_t	Initialize () noexcept override
	Initialize the timer.

hf_timer_err_t	Deinitialize () noexcept override
	Deinitialize the timer and free resources.

hf_timer_err_t	Start (hf_u64_t period_us) noexcept override
	Start the timer with specified period.

hf_timer_err_t	Stop () noexcept override
	Stop the timer.

hf_timer_err_t	SetPeriod (hf_u64_t new_period_us) noexcept override
	Change timer period (timer can be running or stopped).

hf_timer_err_t	GetPeriod (hf_u64_t &period_us) noexcept override
	Get current timer period.

hf_timer_err_t	GetStats (hf_u64_t &callback_count, hf_u64_t &missed_callbacks, hf_timer_err_t &last_error) noexcept override
	Get timer statistics and status information.

hf_timer_err_t	ResetStats () noexcept override
	Reset timer statistics.

const char *	GetDescription () const noexcept override
	Get description of this timer implementation.

hf_u64_t	GetMinPeriod () const noexcept override
	Get minimum supported timer period.

hf_u64_t	GetMaxPeriod () const noexcept override
	Get maximum supported timer period.

hf_u64_t	GetResolution () const noexcept override
	Get timer resolution.

hf_timer_err_t	GetStatistics (hf_timer_statistics_t &statistics) const noexcept override
	Get timer operation statistics.

hf_timer_err_t	GetDiagnostics (hf_timer_diagnostics_t &diagnostics) const noexcept override
	Get timer diagnostic information.

Public Member Functions inherited from BasePeriodicTimer
virtual	~BasePeriodicTimer () noexcept=default
	Virtual destructor to ensure proper cleanup.

	BasePeriodicTimer (const BasePeriodicTimer &)=delete

BasePeriodicTimer &	operator= (const BasePeriodicTimer &)=delete

bool	IsInitialized () const noexcept
	Check if timer is initialized.

bool	IsRunning () const noexcept
	Check if timer is currently running.

hf_timer_err_t	SetCallback (hf_timer_callback_t callback, void *user_data=nullptr) noexcept
	Set new callback function.

void *	GetUserData () const noexcept
	Get current user data pointer.

virtual hf_timer_err_t	ResetStatistics () noexcept
	Reset timer operation statistics.

virtual hf_timer_err_t	ResetDiagnostics () noexcept
	Reset timer diagnostic information.

Private Member Functions
hf_timer_err_t	ConvertError (int platform_error) const noexcept
	Convert platform-specific error to hf_timer_err_t.

bool	ValidatePeriod (hf_u64_t period_us) const noexcept
	Validate timer period.

bool	CreateTimerHandle () noexcept
	Create platform-specific timer handle.

void	DestroyTimerHandle () noexcept
	Destroy platform-specific timer handle.

Static Private Member Functions
static void	InternalTimerCallback (void *arg)
	Internal timer callback dispatcher (ISR-safe C bridge).

Private Attributes
hf_timer_handle_t	timer_handle_
	Platform-specific timer handle.

hf_u64_t	period_us_
	Current timer period in microseconds.

hf_timer_stats_t	stats_
	Timer statistics.

Additional Inherited Members
Protected Member Functions inherited from BasePeriodicTimer
	BasePeriodicTimer (hf_timer_callback_t callback, void *user_data=nullptr) noexcept
	Protected constructor with callback specification.

void	SetInitialized (bool initialized) noexcept
	Set the initialized state.

void	SetRunning (bool running) noexcept
	Set the running state.

void	ExecuteCallback () noexcept
	Execute the timer callback (called by implementations).

bool	HasValidCallback () const noexcept
	Check if callback is valid.

Protected Attributes inherited from BasePeriodicTimer
hf_timer_callback_t	callback_
	Timer callback function.

void *	user_data_
	User data passed to callback.

bool	initialized_
	Initialization state flag.

bool	running_
	Running state flag.

hf_timer_statistics_t	statistics_
	Timer operation statistics.

hf_timer_diagnostics_t	diagnostics_
	Timer diagnostic information.

Detailed Description

MCU-integrated periodic timer implementation.

This class provides periodic timer functionality using the microcontroller's built-in timer peripherals. On ESP32, it uses the ESP timer API. The implementation handles platform-specific details while providing the unified BasePeriodicTimer API.

Features:

High-precision periodic timing using MCU's integrated timers
Microsecond resolution timing
Callback-based event notification
Start/stop control with period adjustment
Comprehensive error handling and status reporting
Lazy initialization support

Note: This implementation uses hardware timers for precise timing

Constructor & Destructor Documentation

◆ EspPeriodicTimer() [1/3]

EspPeriodicTimer::EspPeriodicTimer	(	hf_timer_callback_t	callback = nullptr,
		void *	user_data = nullptr )

noexcept

Constructor with callback specification.

Parameters

callback	Callback function to be called on timer expiry
user_data	User data passed to callback function

◆ ~EspPeriodicTimer()

EspPeriodicTimer::~EspPeriodicTimer ( )

overridenoexcept

Destructor - ensures timer is stopped and resources are freed.

◆ EspPeriodicTimer() [2/3]

EspPeriodicTimer::EspPeriodicTimer ( const EspPeriodicTimer & )

delete

◆ EspPeriodicTimer() [3/3]

EspPeriodicTimer::EspPeriodicTimer ( EspPeriodicTimer && )

delete

Member Function Documentation

◆ ConvertError()

hf_timer_err_t EspPeriodicTimer::ConvertError ( int platform_error ) const

privatenoexcept

Convert platform-specific error to hf_timer_err_t.

Parameters

platform_error Platform-specific error code

Returns: Corresponding hf_timer_err_t

◆ CreateTimerHandle()

bool EspPeriodicTimer::CreateTimerHandle ( )

privatenoexcept

Create platform-specific timer handle.

Returns: Success if handle created successfully

◆ Deinitialize()

hf_timer_err_t EspPeriodicTimer::Deinitialize ( )

overridevirtualnoexcept

Deinitialize the timer and free resources.

Returns: Success or specific error code

Implements BasePeriodicTimer.

◆ DestroyTimerHandle()

void EspPeriodicTimer::DestroyTimerHandle ( )

privatenoexcept

Destroy platform-specific timer handle.

◆ GetDescription()

const char * EspPeriodicTimer::GetDescription ( ) const

overridevirtualnoexcept

Get description of this timer implementation.

Returns: Description string

Implements BasePeriodicTimer.

◆ GetDiagnostics()

hf_timer_err_t EspPeriodicTimer::GetDiagnostics ( hf_timer_diagnostics_t & diagnostics ) const

overridevirtualnoexcept

Get timer diagnostic information.

Parameters

diagnostics Reference to diagnostics structure to fill

Returns: hf_timer_err_t::TIMER_SUCCESS if successful, error code otherwise

Reimplemented from BasePeriodicTimer.

◆ GetMaxPeriod()

hf_u64_t EspPeriodicTimer::GetMaxPeriod ( ) const

overridevirtualnoexcept

Get maximum supported timer period.

Returns: Maximum period in microseconds

Implements BasePeriodicTimer.

◆ GetMinPeriod()

hf_u64_t EspPeriodicTimer::GetMinPeriod ( ) const

overridevirtualnoexcept

Get minimum supported timer period.

Returns: Minimum period in microseconds

Implements BasePeriodicTimer.

◆ GetPeriod()

hf_timer_err_t EspPeriodicTimer::GetPeriod ( hf_u64_t & period_us )

overridevirtualnoexcept

Get current timer period.

Parameters

period_us Reference to store current period

Returns: Success or specific error code

Implements BasePeriodicTimer.

◆ GetResolution()

hf_u64_t EspPeriodicTimer::GetResolution ( ) const

overridevirtualnoexcept

Get timer resolution.

Returns: Timer resolution in microseconds

Implements BasePeriodicTimer.

◆ GetStatistics()

hf_timer_err_t EspPeriodicTimer::GetStatistics ( hf_timer_statistics_t & statistics ) const

overridevirtualnoexcept

Get timer operation statistics.

Parameters

statistics Reference to statistics structure to fill

Returns: hf_timer_err_t::TIMER_SUCCESS if successful, error code otherwise

Reimplemented from BasePeriodicTimer.

◆ GetStats()

hf_timer_err_t EspPeriodicTimer::GetStats	(	hf_u64_t &	callback_count,
		hf_u64_t &	missed_callbacks,
		hf_timer_err_t &	last_error )

overridevirtualnoexcept

Get timer statistics and status information.

Parameters

callback_count	Number of callbacks executed
missed_callbacks	Number of missed callbacks (if supported)
last_error	Last error that occurred

Returns: Success or specific error code

Implements BasePeriodicTimer.

◆ Initialize()

hf_timer_err_t EspPeriodicTimer::Initialize ( )

overridevirtualnoexcept

Initialize the timer.

Returns: Success or specific error code

Implements BasePeriodicTimer.

◆ InternalTimerCallback()

void EspPeriodicTimer::InternalTimerCallback ( void * arg )

staticprivate

Internal timer callback dispatcher (ISR-safe C bridge).

Parameters

arg	User data (pointer to EspPeriodicTimer instance)

Note: This is the C callback that bridges to C++ class methods

◆ operator=() [1/2]

EspPeriodicTimer & EspPeriodicTimer::operator= ( const EspPeriodicTimer & )

delete

◆ operator=() [2/2]

EspPeriodicTimer & EspPeriodicTimer::operator= ( EspPeriodicTimer && )

delete

◆ ResetStats()

hf_timer_err_t EspPeriodicTimer::ResetStats ( )

overridevirtualnoexcept

Reset timer statistics.

Returns: Success or specific error code

Implements BasePeriodicTimer.

◆ SetPeriod()

hf_timer_err_t EspPeriodicTimer::SetPeriod ( hf_u64_t new_period_us )

overridevirtualnoexcept

Change timer period (timer can be running or stopped).

Parameters

new_period_us New period in microseconds

Returns: Success or specific error code

Implements BasePeriodicTimer.

◆ Start()

hf_timer_err_t EspPeriodicTimer::Start ( hf_u64_t period_us )

overridevirtualnoexcept

Start the timer with specified period.

Parameters

period_us Timer period in microseconds

Returns: Success or specific error code

Implements BasePeriodicTimer.

◆ Stop()

hf_timer_err_t EspPeriodicTimer::Stop ( )

overridevirtualnoexcept

Stop the timer.

Returns: Success or specific error code

Implements BasePeriodicTimer.

◆ ValidatePeriod()

bool EspPeriodicTimer::ValidatePeriod ( hf_u64_t period_us ) const

privatenoexcept

Validate timer period.

Parameters

period_us Period to validate in microseconds

Returns: True if valid, false otherwise

Member Data Documentation

◆ period_us_

hf_u64_t EspPeriodicTimer::period_us_

private

Current timer period in microseconds.

◆ stats_

hf_timer_stats_t EspPeriodicTimer::stats_

private

Timer statistics.

◆ timer_handle_

hf_timer_handle_t EspPeriodicTimer::timer_handle_

private

Platform-specific timer handle.

The documentation for this class was generated from the following files:

inc/mcu/esp32/EspPeriodicTimer.h
src/mcu/esp32/EspPeriodicTimer.cpp

Public Member Functions

Private Member Functions

Static Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ EspPeriodicTimer() [1/3]

◆ ~EspPeriodicTimer()

◆ EspPeriodicTimer() [2/3]

◆ EspPeriodicTimer() [3/3]

Member Function Documentation

◆ ConvertError()

◆ CreateTimerHandle()

◆ Deinitialize()

◆ DestroyTimerHandle()

◆ GetDescription()

◆ GetDiagnostics()

◆ GetMaxPeriod()

◆ GetMinPeriod()

◆ GetPeriod()

◆ GetResolution()

◆ GetStatistics()

◆ GetStats()

◆ Initialize()

◆ InternalTimerCallback()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ ResetStats()

◆ SetPeriod()

◆ Start()

◆ Stop()

◆ ValidatePeriod()

Member Data Documentation

◆ period_us_

◆ stats_

◆ timer_handle_