Implementation of the PCF85176 controllers. More...

#include <SegDriver_PCF85176.h>

Inheritance diagram for SegDriver_PCF85176:

Public Member Functions
	SegDriver_PCF85176 (SegTransportI2C &transport, uint8_t address=DEFAULT_PCX85_I2C_ADDRESS, uint8_t subaddress=DEFAULT_SUBADDRESS)
	Constructor for PCF85176 segment driver.

Public Member Functions inherited from SegDriver_PCx85
	SegDriver_PCx85 (SegTransportI2C &transport, uint8_t address, uint8_t subaddress)
	Constructor for PCx85 segment driver.

virtual void	init () override
	Logical display sections that can be targeted by higher-level rendering logic.

void	bankSelect (uint8_t input, uint8_t output)
	Select bank for input and output.

void	blink (BlinkFrequency blink=BLINK_FREQUENCY_OFF, BlinkMode mode=BLINK_MODE_NORMAL)
	Set blink frequency and mode.

void	on () override
	Turn the display on.

void	off () override
	Turn the display off.

void	command (uint8_t command) override
	Send RAW command to controller.

void	flush (uint8_t startAddr, uint8_t length) override
	Flush specific range of buffered changes to the display.

virtual void	flush ()
	Flush all buffered changes to the display.

virtual void	flush (uint8_t startAddr, uint8_t length)
	Flush specific range of buffered changes to the display.

Public Member Functions inherited from SegLCDLib
	SegLCDLib ()=default
	Default constructor.

virtual	~SegLCDLib ()
	Virtual destructor to ensure proper cleanup in derived classes.

	SegLCDLib (const SegLCDLib &)=delete
	Disable copying to keep the RAM buffer uniquely owned.

SegLCDLib &	operator= (const SegLCDLib &)=delete

virtual void	clear ()
	Clear all visible segments on the display.

void	home ()
	Set cursor to 0, 0 without clear display.

virtual void	setCursor (uint8_t row, uint8_t col)
	Set cursor on exact digit.

virtual size_t	write (uint8_t)

size_t	write (const char *str)
	Write a null-terminated string to the display.

size_t	write (const char *buffer, size_t size)
	Write a buffer of characters to the display.

void	initBacklight (SegBacklight *backlight, BacklightMode backlightMode=BACKLIGHT_DIGITAL)
	Initialize backlight control.

virtual void	setBacklight (bool state)
	Set backlight state (on/off).

virtual void	setBacklight (int brightness)
	Set backlight brightness (0-255).

void	setAutoFlush (bool enable)
	Enable or disable autoflush mode.

bool	getAutoFlush () const
	Get current autoflush state.

const uint8_t *	getRamBuffer () const
	Get pointer to internal RAM buffer (read-only).

size_t	getRamBufferSize () const
	Get size of internal RAM buffer in bytes.

Protected Member Functions
void	_sendCommand (uint8_t command, bool last=true) override

void	_writeRam (uint8_t *data, size_t length, uint8_t address=0) override
	Low-level method to write a data buffer to display RAM.

void	_writeRam (uint8_t data, uint8_t address=0)
	Low-level method to write a single byte to display RAM.

virtual void	_writeRam (uint8_t *data, size_t length, uint8_t address)=0
	Low-level method to write a data buffer to display RAM.

Protected Member Functions inherited from SegDriver_PCx85
void	_setMode (ModeStatus status, ModeDrive drive=MODE_DRIVE_14, ModeBias bias=MODE_BIAS_13)
	Set the mode of the display.

void	_writeRam (uint8_t data, uint8_t address=0)
	Low-level method to write a single byte to display RAM.

virtual void	_writeRam (uint8_t *data, size_t length, uint8_t address)=0
	Low-level method to write a data buffer to display RAM.

Protected Member Functions inherited from SegLCDLib
void	_setFlag (uint8_t mask)
	Set a specific flag bit.

void	_clearFlag (uint8_t mask)
	Clear a specific flag bit.

bool	_isFlagSet (uint8_t mask) const
	Check if a specific flag bit is set.

void	_clearAllFlags ()
	Clear all flags.

bool	_dotWrite (uint8_t ch, int8_t minCol, int8_t maxCol, int8_t ramOffset)
	Write decimal point.

void	_dotClearCur (int8_t minCol, int8_t maxCol)
	Clear current decimal (overwrite).

void	_colonClearIfNotFlagged (uint8_t ch, uint8_t colonCol, uint8_t colonFlag)
	Clear colon if its flag is not set.

virtual void	_setDecimal (uint8_t, uint8_t, bool)
	Virtual method for setting decimal point.

virtual void	_setColon (uint8_t, uint8_t, bool)
	Virtual method for setting colon.

void	_allocateBuffer (size_t size)
	Allocate RAM buffer for display data.

void	_writeRamMasked (uint8_t data, uint8_t address, uint8_t mask=0xFF)
	Write to display RAM with nibble-aware masking support.

void	_writeRam (uint8_t data, uint8_t address=0)
	Low-level method to write a single byte to display RAM.

uint8_t	_get_char_value (char ch)
	Helper method to convert a character to its segment representation.

uint16_t	_get_16char_value (char ch)
	Helper method to convert a character to its 16-segment representation.

Static Protected Attributes
static constexpr uint8_t	MAX_ADDRESS = 39

static constexpr uint8_t	CMD_LAST_COMMAND = 0x80

Static Protected Attributes inherited from SegDriver_PCx85
static constexpr uint8_t	CMD_MODE = 0x40

static constexpr uint8_t	CMD_DEVICE_SELECT = 0x60

static constexpr uint8_t	CMD_BLINK = 0x70

static constexpr uint8_t	CMD_BANK_SELECT = 0x78

static constexpr uint8_t	DEFAULT_PCX85_I2C_ADDRESS = 0x38

static constexpr uint8_t	DEFAULT_SUBADDRESS = 0x00

Static Protected Attributes inherited from SegLCDLib
static constexpr uint8_t	FLAG_PENDING_DOT = 0x80
	Common flag for decimal handling when RAM offset is 0.

Additional Inherited Members
Public Types inherited from SegDriver_PCx85
enum	ModeStatus { MODE_STATUS_BLANK = 0 , MODE_STATUS_ENABLED = 1 }
	Enable/disable display. More...

enum	BlinkFrequency { BLINK_FREQUENCY_OFF = 0 , BLINK_FREQUENCY_1 = 1 , BLINK_FREQUENCY_2 = 2 , BLINK_FREQUENCY_3 = 3 }
	Set blink frequency. More...

enum	BlinkMode { BLINK_MODE_NORMAL = 0 , BLINK_MODE_ALTRAM = 1 }
	Set blink mode. More...

Public Types inherited from SegLCDLib
enum	BacklightMode { BACKLIGHT_DIGITAL , BACKLIGHT_PWM }
	Backlight mode for GPIO control. More...

Protected Attributes inherited from SegDriver_PCx85
SegTransportI2C &	_transport

uint8_t	_address

uint8_t	_subaddress

ModeDrive	_drive

ModeBias	_bias

Protected Attributes inherited from SegLCDLib
bool	_autoFlush = true
	Autoflush mode enabled flag (default: true for LCD API 1.0 compatibility).

SegBacklight *	_backlight = nullptr
	Backlight implementation (nullptr if disabled)

BacklightMode	_backlightMode = BACKLIGHT_DIGITAL
	Backlight mode (DIGITAL or PWM)

uint8_t	_backlightBrightness = 0
	Cached backlight brightness.

uint8_t	_displayFlags = 0
	Generic flag storage for display-specific state tracking.

uint8_t *	_ramBuffer = nullptr
	Dynamic RAM buffer for display data (allocated by derived classes).

size_t	_ramBufferSize = 0
	Size of allocated RAM buffer in bytes.

uint8_t	_cursorRow = 0
	Current Row.

uint8_t	_cursorCol = 0
	Current Column.

Detailed Description

Implementation of the PCF85176 controllers.

Constructor & Destructor Documentation

◆ SegDriver_PCF85176()

SegDriver_PCF85176::SegDriver_PCF85176	(	SegTransportI2C &	transport,
		uint8_t	address = `DEFAULT_PCX85_I2C_ADDRESS`,
		uint8_t	subaddress = `DEFAULT_SUBADDRESS`
	)

inline

Constructor for PCF85176 segment driver.

Parameters

transport	I2C transport implementation
address	I2C address of the PCF85176 device (default is 0x38)
subaddress	Subaddress for the device (default is 0)

Member Function Documentation

◆ _sendCommand()

void SegDriver_PCF85176::_sendCommand	(	uint8_t	command,
		bool	last = `true`
	)

overrideprotectedvirtual

Implements SegDriver_PCx85.

◆ _writeRam() [1/3]

virtual void SegLCDLib::_writeRam	(	uint8_t *	data,
		size_t	length,
		uint8_t	address
	)

protectedvirtual

Low-level method to write a data buffer to display RAM.

Parameters

data	Pointer to data buffer
length	Length of data buffer
address	Start RAM address

Implements SegDriver_PCx85.

◆ _writeRam() [2/3]

void SegDriver_PCF85176::_writeRam	(	uint8_t *	data,
		size_t	length,
		uint8_t	address = `0`
	)

overrideprotectedvirtual

Low-level method to write a data buffer to display RAM.

Parameters

data	Pointer to data buffer
length	Length of data buffer
address	Start RAM address

Implements SegDriver_PCx85.

◆ _writeRam() [3/3]

void SegLCDLib::_writeRam	(	uint8_t	data,
		uint8_t	address = `0`
	)

protected

Low-level method to write a single byte to display RAM.

Parameters

data	Data byte
address	RAM address

Field Documentation

◆ CMD_LAST_COMMAND

constexpr uint8_t SegDriver_PCF85176::CMD_LAST_COMMAND = 0x80

staticconstexprprotected

◆ MAX_ADDRESS

constexpr uint8_t SegDriver_PCF85176::MAX_ADDRESS = 39

staticconstexprprotected

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

src/SegDriver_PCF85176.h
src/SegDriver_PCF85176.cpp

Public Member Functions

Protected Member Functions

Static Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SegDriver_PCF85176()

Member Function Documentation

◆ _sendCommand()

◆ _writeRam() [1/3]

◆ _writeRam() [2/3]

◆ _writeRam() [3/3]

Field Documentation

◆ CMD_LAST_COMMAND

◆ MAX_ADDRESS