PCF8574LedDriver Class Reference

8-LED driver based on the PCF8574 GPIO expander More...

#include <OutputHardware.hpp>

Public Member Functions
	PCF8574LedDriver (I2CBus bus, uint8_t address7bits)
	Construct a LED driver.
void	setLed (uint8_t index, bool state)
	Set the state of a single LED.
void	shiftLeft ()
	Shift all lights to the left.
void	shiftRight ()
	Shift all lights to the right.
void	swap ()
	Invert the state of all LEDs.
void	show () const
	Show the required LEDs all at once.
uint8_t	getState () const
	Get the state of each LED.
void	setState (uint8_t state)
	Set the state of each LED all at once.

Detailed Description

8-LED driver based on the PCF8574 GPIO expander

Note

For single-color LEDs. P0 is the left-most LED. P7 is the right-most LED.

Definition at line 194 of file OutputHardware.hpp.

Constructor & Destructor Documentation

PCF8574LedDriver()

PCF8574LedDriver::PCF8574LedDriver	(	I2CBus	bus,
		uint8_t	address7bits )

Construct a LED driver.

Parameters

bus	I2C bus where the chip is attached to.
address7bits	Full I2C address in 7-bit format.

~PCF8574LedDriver()

PCF8574LedDriver::~PCF8574LedDriver ( )

inline

Definition at line 264 of file OutputHardware.hpp.

Member Function Documentation

getState()

uint8_t PCF8574LedDriver::getState ( ) const

inline

Get the state of each LED.

Returns

uint8_t A bitmap. 1 means turn on. 0 means turn off.

Definition at line 253 of file OutputHardware.hpp.

setLed()

void PCF8574LedDriver::setLed	(	uint8_t	index,
		bool	state )

Set the state of a single LED.

Note

Not displayed immediately

Parameters

index	LED index in the range [0,7]. P0 has index 0.
state	True to turn on, false to turn off.

setState()

void PCF8574LedDriver::setState ( uint8_t state )

inline

Set the state of each LED all at once.

Note

Not displayed immediately

Parameters

state

A bitmap. 1 means turn on. 0 means turn off.

Definition at line 262 of file OutputHardware.hpp.

shiftLeft()

void PCF8574LedDriver::shiftLeft

(

)

Shift all lights to the left.

Note

Not displayed immediately. P0 is the left-most LED.

shiftRight()

void PCF8574LedDriver::shiftRight

(

)

Shift all lights to the right.

Note

Not displayed immediately. P0 is the left-most LED.

swap()

void PCF8574LedDriver::swap ( )

inline

Invert the state of all LEDs.

Note

Not displayed immediately

Definition at line 240 of file OutputHardware.hpp.

---

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

• /github/workspace/src/include/OutputHardware.hpp