c7222::Led Class Reference

Output-only GPIO wrapper intended for LEDs. More...

#include <led.hpp>

Inheritance diagram for c7222::Led:

Collaboration diagram for c7222::Led:

Public Member Functions
	Led (uint32_t pin, bool initial_on=false, GpioDriveStrength drive=GpioDriveStrength::mA4, bool active_low=false)
	Construct an LED output pin.
void	Configure (const Config &config)=delete
	Disallow generic reconfiguration.
void	Reconfigure (bool initial_on=false, GpioDriveStrength drive=GpioDriveStrength::mA4, bool active_low=false)
	Reconfigure LED output settings.
void	Set (bool on)
	Set the LED state.
void	On ()
	Turn the LED on.
void	Off ()
	Turn the LED off.
void	Toggle ()
	Toggle the LED state.
Public Member Functions inherited from c7222::GpioOut
	GpioOut (uint32_t pin)
	Create a GPIO output with default configuration.
virtual	~GpioOut ()
	Destructor.
	GpioOut (uint32_t pin, const Config &config)
	Create a GPIO output with the given configuration.
void	Configure (const Config &config)
	Apply a new configuration.
void	Write (bool value)
	Write an output value.
void	Toggle ()
	Toggle the pin output.
uint32_t	GetPin () const
	Return the GPIO number.
Config	GetConfig () const
	Return the cached configuration.
Public Member Functions inherited from c7222::NonCopyable
	NonCopyable (const NonCopyable &)=delete
NonCopyable &	operator= (const NonCopyable &)=delete
	NonCopyable (NonCopyable &&)=default
NonCopyable &	operator= (NonCopyable &&)=default
Public Member Functions inherited from c7222::NonMovable
	NonMovable (const NonMovable &)=default
NonMovable &	operator= (const NonMovable &)=default
	NonMovable (NonMovable &&)=delete
NonMovable &	operator= (NonMovable &&)=delete

Additional Inherited Members
Protected Member Functions inherited from c7222::GpioOut
void	ApplyConfig ()
	Apply internal configuration to the hardware.
Protected Member Functions inherited from c7222::NonCopyableNonMovable
	NonCopyableNonMovable ()=default
	~NonCopyableNonMovable ()=default
Protected Member Functions inherited from c7222::NonCopyable
	NonCopyable ()=default
	~NonCopyable ()=default
Protected Member Functions inherited from c7222::NonMovable
	NonMovable ()=default
	~NonMovable ()=default
Protected Attributes inherited from c7222::GpioOut
uint32_t	pin_
	GPIO pin number managed by this instance.
Config	config_
	Cached configuration used to (re)apply platform settings.

Detailed Description

Output-only GPIO wrapper intended for LEDs.

Design intent:

• Output-only: derives from GpioOut and deletes Configure() to prevent accidental reconfiguration into input mode.
• LED-friendly API: exposes On(), Off(), Set(), and Toggle() instead of raw GPIO writes.

Default configuration:

• OutputType::PushPull
• PullMode::None
• Drive strength configurable (default 4 mA)

Active-low support:

• Some boards (including the C7222 Pico W board LEDs) are wired active-low so a GPIO low turns the LED on.
• The active_low flag controls the logical-to-physical mapping so callers can use On()/Off() without worrying about wiring.

Reconfiguration note:

• If the LED pin was temporarily used for PWM, call Reconfigure() after releasing PWM ownership to restore LED-safe GPIO settings.

Constructor & Destructor Documentation

Led()

c7222::Led::Led ( uint32_t  pin, bool  initial_on = false, GpioDriveStrength  drive = GpioDriveStrength::mA4, bool  active_low = false  )

explicit

Construct an LED output pin.

Parameters

pin	GPIO number.
initial_on	Initial LED state (default: false/off).
drive	Pad drive strength (default: 4 mA).
active_low	If true, LED is active-low (GPIO low = on).

Member Function Documentation

Configure()

void c7222::Led::Configure ( const Config &  config )

delete

Disallow generic reconfiguration.

This prevents accidentally switching the LED pin into input mode.

Off()

void c7222::Led::Off

(

)

Turn the LED off.

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On()

void c7222::Led::On

(

)

Turn the LED on.

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Reconfigure()

void c7222::Led::Reconfigure	(	bool	initial_on = false,
		GpioDriveStrength	drive = GpioDriveStrength::mA4,
		bool	active_low = false
	)

Reconfigure LED output settings.

This is intended for cases where the pin was temporarily used for PWM and then returned to GPIO control. It only exposes LED-safe settings.

Parameters

initial_on	Initial LED state (default: false/off).
drive	Pad drive strength (default: 4 mA).
active_low	If true, LED is active-low (GPIO low = on).

Set()

void c7222::Led::Set

(

bool

on

)

Set the LED state.

Parameters

on	true = on, false = off.

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Toggle()

void c7222::Led::Toggle

(

)

Toggle the LED state.

Note: For active-low LEDs, toggling the GPIO level still toggles the LED.

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

• libs/elec_c7222/devices/include/led.hpp