Adafruit_MCP4728 Class Reference

Class that stores state and functions for interacting with the MCP4728 I2C Digital Potentiometer. More...

#include <Adafruit_MCP4728.h>

Public Member Functions
	Adafruit_MCP4728 ()
	Instantiates a new MCP4728 class.
bool	begin (uint8_t i2c_address=MCP4728_I2CADDR_DEFAULT, TwoWire *wire=&Wire)
	Sets up the hardware and initializes I2C. More...
bool	setChannelValue (MCP4728_channel_t channel, uint16_t new_value, MCP4728_vref_t new_vref=MCP4728_VREF_VDD, MCP4728_gain_t new_gain=MCP4728_GAIN_1X, MCP4728_pd_mode_t new_pd_mode=MCP4728_PD_MODE_NORMAL, bool udac=false)
	Sets the input register for a given channel to the specified settings. More...
bool	fastWrite (uint16_t channel_a_value, uint16_t channel_b_value, uint16_t channel_c_value, uint16_t channel_d_value)
	Set the values of all four channels simultaneously with minimal delay or configuration. More...
bool	saveToEEPROM (void)
	Saves the DAC's input register settings to the internal EEPROM, makeing them the default values when the ADC is powered on. More...

Detailed Description

Class that stores state and functions for interacting with the MCP4728 I2C Digital Potentiometer.

Member Function Documentation

begin()

boolean Adafruit_MCP4728::begin	(	uint8_t	i2c_address = MCP4728_I2CADDR_DEFAULT,
		TwoWire *	wire = &Wire
	)

Sets up the hardware and initializes I2C.

Parameters

i2c_address	The I2C address to be used.
wire	The Wire object to be used for I2C connections.

Returns

True if initialization was successful, otherwise false.

setChannelValue()

bool Adafruit_MCP4728::setChannelValue	(	MCP4728_channel_t	channel,
		uint16_t	new_value,
		MCP4728_vref_t	new_vref = MCP4728_VREF_VDD,
		MCP4728_gain_t	new_gain = MCP4728_GAIN_1X,
		MCP4728_pd_mode_t	new_pd_mode = MCP4728_PD_MODE_NORMAL,
		bool	udac = false
	)

Sets the input register for a given channel to the specified settings.

Parameters

channel	The channel to update
new_value	The new value to assign
new_vref	Optional vref setting - Defaults to MCP4728_VREF_VDD
new_gain	Optional gain setting - Defaults to MCP4728_GAIN_1X
new_pd_mode	Optional power down mode setting - Defaults to MCP4728_PD_MOOE_NORMAL
udac	Optional UDAC setting - Defaults to false, latching immediately. Set to true to latch when the LDAC pin is pulled low

Returns

true if the write was successful

false if there was an error with I2C communication between the MCU and the DAC

fastWrite()

bool Adafruit_MCP4728::fastWrite	(	uint16_t	channel_a_value,
		uint16_t	channel_b_value,
		uint16_t	channel_c_value,
		uint16_t	channel_d_value
	)

Set the values of all four channels simultaneously with minimal delay or configuration.

Parameters

channel_a_value	The value to assign to channel A
channel_b_value	The value to assign to channel B
channel_c_value	The value to assign to channel C
channel_d_value	The value to assign to channel D

Returns

true if the write was successful

false if there was an error with I2C communication between the MCU and the DAC

saveToEEPROM()

bool Adafruit_MCP4728::saveToEEPROM

(

void

)

Saves the DAC's input register settings to the internal EEPROM, makeing them the default values when the ADC is powered on.

Returns

true if the write was successful

false if there was an error with I2C communication between the MCU and the DAC

---

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

• Adafruit_MCP4728.h
• Adafruit_MCP4728.cpp