esp32-snippets/PCF8575_8h_source.html

 /*

  * PCF8575.h

  *

  *  Created on: Jan 27, 2018

  *      Author: kolban

  */


 #ifndef COMPONENTS_CPP_UTILS_PCF8575_H_

 #define COMPONENTS_CPP_UTILS_PCF8575_H_

 #include "I2C.h"


 class PCF8575 {

 public:

     PCF8575(uint8_t address);

     virtual ~PCF8575();

     void     init(gpio_num_t sdaPin = I2C::DEFAULT_SDA_PIN, gpio_num_t clkPin = I2C::DEFAULT_CLK_PIN);

     uint16_t read();

     bool     readBit(uint16_t bit);

     void     setInvert(bool value);

     void     write(uint16_t value);

     void     writeBit(uint16_t bit, bool value);


 private:

     I2C* i2c;

     uint16_t m_lastWrite;

     bool    invert = false;

 };


 #endif /* COMPONENTS_CPP_UTILS_PCF8575_H_ */

PCF8575::readBit
bool readBit(uint16_t bit)
Read the logic level on a given pin.
Definition: PCF8575.cpp:56

PCF8575::write
void write(uint16_t value)
Set the output values of the device.
Definition: PCF8575.cpp:68

I2C::DEFAULT_SDA_PIN
static const gpio_num_t DEFAULT_SDA_PIN
The default SDA pin.
Definition: I2C.h:24

PCF8575::writeBit
void writeBit(uint16_t bit, bool value)
Change the output value of a specific pin.
Definition: PCF8575.cpp:89

PCF8575
Encapsulate a PCF8575 device.
Definition: PCF8575.h:20

PCF8575::setInvert
void setInvert(bool value)
Invert the bit values. Normally setting a pin's value to 1 means that a high signal is generated and ...
Definition: PCF8575.cpp:110

I2C::DEFAULT_CLK_PIN
static const gpio_num_t DEFAULT_CLK_PIN
The default Clock pin.
Definition: I2C.h:29

PCF8575::init
void init(gpio_num_t sdaPin=I2C::DEFAULT_SDA_PIN, gpio_num_t clkPin=I2C::DEFAULT_CLK_PIN)
Initialize the PCF8575 device.
Definition: PCF8575.cpp:121

PCF8575::read
uint16_t read()
Read all the input bits from the device.
Definition: PCF8575.cpp:40

I2C
Interface to I2C functions.
Definition: I2C.h:19

PCF8575::~PCF8575
virtual ~PCF8575()
Class instance destructor.
Definition: PCF8575.cpp:31

PCF8575::PCF8575
PCF8575(uint8_t address)
Class constructor.
Definition: PCF8575.cpp:21