Adafruit_PCF8591 Class Reference

#include <Adafruit_PCF8591.h>

Public Member Functions
	Adafruit_PCF8591 (void)
	PCF8591 constructor.
bool	begin (uint8_t i2caddr=PCF8591_DEFAULT_ADDR, TwoWire *theWire=&Wire)
void	enableDAC (bool enable)
uint8_t	analogRead (uint8_t adcnum)
void	analogWrite (uint8_t output)

Detailed Description

Driver for the Adafruit PCF8591 Combo ADC + DAC

Member Function Documentation

begin()

bool Adafruit_PCF8591::begin	(	uint8_t	i2caddr = PCF8591_DEFAULT_ADDR,
		TwoWire *	theWire = &Wire
	)

Initialises the I2C bus, and finds the PCF8591 on the bus

Parameters

i2caddr	The I2C address to use for the sensor.
*theWire	Optional wire interface, defaults to &Wire

Returns

True if initialisation was successful, otherwise False.

enableDAC()

void Adafruit_PCF8591::enableDAC

(

bool

enable

)

Enables the DAC output or sets it to tri-state / high-Z

Parameters

enable

Flag for desired DAC state

analogRead()

uint8_t Adafruit_PCF8591::analogRead

(

uint8_t

adcnum

)

Read an analog value from one of the four ADC inputs

Parameters

adcnum

The single-ended ADC to read from, 0 thru 3

Returns

The value read: 0 is GND and 255 is VCC

analogWrite()

void Adafruit_PCF8591::analogWrite

(

uint8_t

output

)

Writes a uint8_t value to the DAC output

Parameters

output

The value to write: 0 is GND and 255 is VCC

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

• Adafruit_PCF8591.h
• Adafruit_PCF8591.cpp