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https://github.com/RobTillaart/Arduino.git
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71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
//
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// FILE: PCF8574.H
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// AUTHOR: Rob Tillaart
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// DATE: 02-febr-2013
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// VERSION: 0.1.9
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// PURPOSE: I2C PCF8574 library for Arduino
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// URL: http://forum.arduino.cc/index.php?topic=184800
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//
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// HISTORY:
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// see PCF8574.cpp file
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//
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#ifndef _PCF8574_H
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#define _PCF8574_H
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#if defined(ARDUINO) && ARDUINO >= 100
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#include "Arduino.h"
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#else
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#include "WProgram.h"
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#endif
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#define PCF8574_LIB_VERSION "0.1.9"
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#define PCF8574_OK 0x00
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#define PCF8574_PIN_ERROR 0x81
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#define PCF8574_I2C_ERROR 0x82
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class PCF8574
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{
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public:
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explicit PCF8574(const uint8_t deviceAddress);
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void begin(uint8_t val=0xFF);
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uint8_t read8();
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uint8_t read(uint8_t pin);
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uint8_t value() const { return _dataIn; };
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void write8(const uint8_t value);
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void write(const uint8_t pin, const uint8_t value);
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uint8_t valueOut() const { return _dataOut; }
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//added 0.1.07/08 Septillion
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inline uint8_t readButton8(){ return PCF8574::readButton8(_buttonMask);}
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uint8_t readButton8(const uint8_t mask=0xFF);
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uint8_t readButton(const uint8_t pin);
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void setButtonMask(uint8_t mask);
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// rotate, shift, toggle expect all lines are output
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void toggle(const uint8_t pin);
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void toggleMask(const uint8_t mask); // invertAll() = toggleMask(0xFF)
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void shiftRight(const uint8_t n=1);
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void shiftLeft(const uint8_t n=1);
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void rotateRight(const uint8_t n=1);
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void rotateLeft(const uint8_t n=1);
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int lastError();
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private:
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uint8_t _address;
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uint8_t _dataIn;
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uint8_t _dataOut;
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uint8_t _buttonMask;
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int _error;
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};
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#endif
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//
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// END OF FILE
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//
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