AXP202 GPIO pin control. More...

#include <AXP202Gpio.hpp>

Inheritance diagram for AXP202Gpio:

Public Member Functions
	AXP202Gpio (AXP202Core &core)
	Construct AXP202 GPIO interface.

	~AXP202Gpio ()=default

uint8_t	getPinCount () const override
	Get number of GPIO pins (4: GPIO0-GPIO3)

Status	setDirection (uint8_t pin, Direction dir) override
	Set GPIO pin direction.

Direction	getDirection (uint8_t pin) override
	Get GPIO pin direction.

Status	setDrive (uint8_t pin, DriveType drive) override
	Set GPIO pin drive type.

DriveType	getDrive (uint8_t pin) override
	Get GPIO pin drive type.

Status	read (uint8_t pin, bool &high) override
	Read digital level from a GPIO pin.

Status	write (uint8_t pin, Level level) override
	Write digital level to a GPIO pin.

Status	setFunction (uint8_t pin, uint8_t func) override
	Set GPIO pin function mode.

uint8_t	getFunction (uint8_t pin) override
	Get current GPIO pin function mode.

Public Member Functions inherited from PmicGpioBase
virtual	~PmicGpioBase ()=default
	Virtual destructor.

Status	pinMode (uint8_t pin, Direction dir, DriveType drive=DriveType::Keep, Pull pull=Pull::Keep, uint8_t func=0xFF)
	Configure a pin with a single high-level call.

virtual Status	setPull (uint8_t pin, Pull pull)
	Set internal pull resistor.

virtual Pull	getPull (uint8_t pin)
	Get current internal pull resistor setting.

Additional Inherited Members
Public Types inherited from PmicGpioBase
enum class	Direction : uint8_t { Input = 0 , Output = 1 }
	GPIO pin direction. More...

enum class	DriveType : uint8_t { PushPull = 0 , OpenDrain = 1 , Keep = 0xFF }
	GPIO drive type. More...

enum class	Level : uint8_t { Low = 0 , HiZ = 1 , High = 2 }
	Output level control. More...

enum class	Pull : uint8_t { None = 0 , Down = 1 , Up = 2 , Keep = 0xFF }
	Internal pull resistor configuration. More...

enum class	Status : uint8_t { Ok = 0 , InvalidPin = 1 , Failed = 2 }
	GPIO operation status code. More...

Static Public Member Functions inherited from PmicGpioBase
static constexpr bool	isOk (Status s)

Detailed Description

AXP202 GPIO pin control.

Implements the PmicGpioBase interface to manage GPIO direction, drive current, and digital level for the AXP202's four GPIO pins.

GPIO0-2 Function Select Values (REG 90H/92H/93H [2:0])

0x00: Output low
0x01: Output high (3.3V)
0x02: Input
0x03: Low-noise LDO
0x04: ADC input
0x06/0x07: Floating (high-impedance)

GPIO3 (REG 95H)

bit2: 0=NMOS open-drain, 1=input
bit1: output: 0=low NMOS on, 1=floating NMOS off
bit0: input status (R): 0=high, 1=low (active-low!)

Note: GPIO3 does not support function multiplexing or push-pull output. Level::High on GPIO3 returns Status::Failed (not supported by hardware).

Definition at line 72 of file AXP202Gpio.hpp.

Constructor & Destructor Documentation

◆ AXP202Gpio()

AXP202Gpio::AXP202Gpio ( AXP202Core & core )

explicit

Construct AXP202 GPIO interface.

Parameters

core	Reference to AXP202 core communication

Definition at line 8 of file AXP202Gpio.cpp.

◆ ~AXP202Gpio()

AXP202Gpio::~AXP202Gpio ( )

default

Member Function Documentation

◆ getDirection()

PmicGpioBase::Direction AXP202Gpio::getDirection ( uint8_t pin )

overridevirtual

Get GPIO pin direction.

Parameters

pin	Pin number (0-3)

Returns: Current Direction enum value

Implements PmicGpioBase.

Definition at line 60 of file AXP202Gpio.cpp.

References PmicGpioBase::Input, PmicGpioBase::Output, and SensorCommWrapper::readReg().

◆ getDrive()

PmicGpioBase::DriveType AXP202Gpio::getDrive ( uint8_t pin )

overridevirtual

Get GPIO pin drive type.

Parameters

pin	Pin number (0-3)

Returns: PushPull for GPIO0-2, OpenDrain for GPIO3

Implements PmicGpioBase.

Definition at line 83 of file AXP202Gpio.cpp.

References PmicGpioBase::OpenDrain, and PmicGpioBase::PushPull.

◆ getFunction()

uint8_t AXP202Gpio::getFunction ( uint8_t pin )

overridevirtual

Get current GPIO pin function mode.

Parameters

pin	Pin number (0-3)

Returns: Function mode value, or 0xFF on error or for GPIO3

Reimplemented from PmicGpioBase.

Definition at line 151 of file AXP202Gpio.cpp.

References SensorCommWrapper::readReg().

◆ getPinCount()

uint8_t AXP202Gpio::getPinCount ( ) const

overridevirtual

Get number of GPIO pins (4: GPIO0-GPIO3)

Returns: 4

Implements PmicGpioBase.

Definition at line 12 of file AXP202Gpio.cpp.

Referenced by setDrive().

◆ read()

PmicGpioBase::Status AXP202Gpio::read	(	uint8_t	pin,
		bool &	high
	)

overridevirtual

Read digital level from a GPIO pin.

Parameters

pin	Pin number (0-3)
high	Reference set to true if pin is high, false if low

Returns: Status::Ok on success, Status::InvalidPin for invalid pin, Status::Failed on I2C/register error

Note: GPIO3 input is active-low per AXP202 datasheet (REG 95H bit0: 0=high, 1=low). This is handled transparently — high=true means pin is electrically high.

Implements PmicGpioBase.

Definition at line 90 of file AXP202Gpio.cpp.

References PmicGpioBase::Failed, axp202_regs::gpio::GPIO012_SIGNAL, PmicGpioBase::InvalidPin, PmicGpioBase::Ok, and SensorCommWrapper::readReg().

◆ setDirection()

PmicGpioBase::Status AXP202Gpio::setDirection	(	uint8_t	pin,
		Direction	dir
	)

overridevirtual

Set GPIO pin direction.

Parameters

pin	Pin number (0-3)
dir	Direction (Input or Output)

Returns: Status::Ok on success, Status::InvalidPin for invalid pin, Status::Failed on I2C/register error

Implements PmicGpioBase.

Definition at line 28 of file AXP202Gpio.cpp.

References PmicGpioBase::Failed, PmicGpioBase::Input, PmicGpioBase::InvalidPin, PmicGpioBase::Ok, PmicGpioBase::Output, SensorCommWrapper::readReg(), SensorCommWrapper::updateBits(), and SensorCommWrapper::writeReg().

◆ setDrive()

PmicGpioBase::Status AXP202Gpio::setDrive	(	uint8_t	pin,
		DriveType	drive
	)

overridevirtual

Set GPIO pin drive type.

Parameters

pin	Pin number (0-3)
drive	Drive type

Returns: Status::Failed for unsupported drive setting, Status::InvalidPin for invalid pin

Implements PmicGpioBase.

Definition at line 73 of file AXP202Gpio.cpp.

References PmicGpioBase::Failed, getPinCount(), and PmicGpioBase::InvalidPin.

◆ setFunction()

PmicGpioBase::Status AXP202Gpio::setFunction	(	uint8_t	pin,
		uint8_t	func
	)

overridevirtual

Set GPIO pin function mode.

Parameters

pin	Pin number (0-2 only; GPIO3 has no function multiplexing)
func	Function mode value (see GPIO0-2 Function Select Values (REG 90H/92H/93H [2:0]) for valid values)

Returns: Status::Ok on success, Status::InvalidPin for invalid pin, Status::Failed if pin=3 or on I2C/register error

Reimplemented from PmicGpioBase.

Definition at line 140 of file AXP202Gpio.cpp.

References PmicGpioBase::Failed, PmicGpioBase::InvalidPin, PmicGpioBase::Ok, and SensorCommWrapper::updateBits().

◆ write()

PmicGpioBase::Status AXP202Gpio::write	(	uint8_t	pin,
		Level	level
	)

overridevirtual

Write digital level to a GPIO pin.

Parameters

pin	Pin number (0-3)
level	Level to set (Low, High, or HiZ)

Returns: Status::Ok on success, Status::InvalidPin for invalid pin, Status::Failed on I2C/register error or unsupported level

Note: GPIO3 does not support Level::High (hardware limitation). GPIO3 supports Level::Low (NMOS on) and Level::HiZ (NMOS off/floating).

Implements PmicGpioBase.

Definition at line 109 of file AXP202Gpio.cpp.

References PmicGpioBase::Failed, PmicGpioBase::High, PmicGpioBase::HiZ, PmicGpioBase::InvalidPin, level, PmicGpioBase::Low, PmicGpioBase::Ok, SensorCommWrapper::readReg(), and SensorCommWrapper::writeReg().

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

Public Member Functions

Additional Inherited Members

Detailed Description

GPIO0-2 Function Select Values (REG 90H/92H/93H [2:0])

GPIO3 (REG 95H)

Constructor & Destructor Documentation

◆ AXP202Gpio()

◆ ~AXP202Gpio()

Member Function Documentation

◆ getDirection()

◆ getDrive()

◆ getFunction()

◆ getPinCount()

◆ read()

◆ setDirection()

◆ setDrive()

◆ setFunction()

◆ write()