SegDriver_PCF8576 Class Reference

PCF8576 LCD segment driver. More...

#include <SegDriver_PCx85.h>

Inheritance diagram for SegDriver_PCF8576:

Public Member Functions
	SegDriver_PCF85176 (TwoWire &i2c, uint8_t address=DEFAULT_PCF85176_I2C_ADDRESS, uint8_t subaddress=DEFAULT_SUBADDRESS)
	Constructor for PCF85176 segment driver.
Public Member Functions inherited from SegDriver_PCF85176
	SegDriver_PCF85176 (TwoWire &i2c, uint8_t address=DEFAULT_PCF85176_I2C_ADDRESS, uint8_t subaddress=DEFAULT_SUBADDRESS)
	Constructor for PCF85176 segment driver.
Public Member Functions inherited from SegDriver_PCx85
	SegDriver_PCx85 (TwoWire &i2c, 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	clear () override
	Clear all visible segments on the display.
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
virtual	~SegLCDLib ()
	Virtual destructor to ensure proper cleanup in derived classes.
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 ch)
void	initBacklight (int8_t backlightPin, BacklightMode backlightMode=BACKLIGHT_DIGITAL, bool backlightActiveHigh=true)
	Initialize GPIO 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.

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 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) override
	Low-level method to write a single byte to display RAM.
void	_writeRam (uint8_t *data, size_t length, uint8_t address=0) override
	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 row, uint8_t col, bool state)
	Virtual method for setting decimal point.
virtual void	_setColon (uint8_t row, uint8_t col, bool state)
	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.
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.
Protected Attributes inherited from SegLCDLib
bool	_autoFlush = true
	Autoflush mode enabled flag (default: true for LCD API 1.0 compatibility).
int8_t	_backlightPin = -1
	Backlight GPIO pin (-1 if disabled)
BacklightMode	_backlightMode = BACKLIGHT_DIGITAL
	Backlight mode (DIGITAL or PWM)
bool	_backlightActiveHigh = true
	Backlight active high flag.
uint8_t	_backlightBrightness = 0
	Cached backlight brightness.
uint8_t	_displayFlags = 0
	LEDC channel for old ESP32 Arduino Core (2.0.x)
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.
Static Protected Attributes inherited from SegDriver_PCx85
static constexpr uint8_t	DEFAULT_PCF85176_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.

Detailed Description

PCF8576 LCD segment driver.

This class is a thin wrapper around SegDriver_PCF85176. The PCF8576 uses the same I2C protocol and command set as the PCF85176, therefore no separate implementation is required.

The class exists to provide a chip-specific type for user code and to allow future divergence if PCF8576-specific behavior is needed.

Member Function Documentation

SegDriver_PCF85176()

SegDriver_PCF85176::SegDriver_PCF85176 ( TwoWire &  i2c, uint8_t  address = DEFAULT_PCF85176_I2C_ADDRESS, uint8_t  subaddress = DEFAULT_SUBADDRESS  )

inline

Constructor for PCF85176 segment driver.

Parameters

i2c	Reference to the TwoWire object for I2C communication
address	I2C address of the PCF85176 device (default is 0x38)
subaddress	Subaddress for the device (default is 0)

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

• src/SegDriver_PCx85.h