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https://github.com/RobTillaart/Arduino.git
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93 lines
2.0 KiB
C++
93 lines
2.0 KiB
C++
#pragma once
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//
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// FILE: PCF8575.h
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// AUTHOR: Rob Tillaart
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// DATE: 2020-07-20
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// VERSION: 0.2.2
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// PURPOSE: Arduino library for PCF8575 - 16 channel I2C IO expander
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// URL: https://github.com/RobTillaart/PCF8575
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#include "Arduino.h"
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#include "Wire.h"
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#define PCF8575_LIB_VERSION (F("0.2.2"))
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#ifndef PCF8575_INITIAL_VALUE
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#define PCF8575_INITIAL_VALUE 0xFFFF
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#endif
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#define PCF8575_OK 0x00
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#define PCF8575_PIN_ERROR 0x81
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#define PCF8575_I2C_ERROR 0x82
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class PCF8575
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{
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public:
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// deviceAddress base = 0x20 + depends on address bits
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explicit PCF8575(const uint8_t deviceAddress = 0x20, TwoWire *wire = &Wire);
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bool begin(uint16_t value = PCF8575_INITIAL_VALUE);
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bool isConnected();
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// note: setting the address may corrupt internal buffer values
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// a read16() / write16() call updates them.
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bool setAddress(const uint8_t deviceAddress);
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uint8_t getAddress();
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uint16_t read16();
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uint8_t read(uint8_t pin);
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uint16_t value();
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void write16(const uint16_t value);
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void write(const uint8_t pin, const uint8_t value);
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uint16_t valueOut();
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// added 0.1.07/08 Septillion
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uint16_t readButton16();
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uint16_t readButton16(const uint16_t mask);
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uint8_t readButton(const uint8_t pin);
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void setButtonMask(uint16_t mask);
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uint16_t getButtonMask();
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// rotate, shift, toggle, reverse expect all lines are output
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void toggle(const uint8_t pin);
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void toggleMask(const uint16_t mask = 0xFFFF); // 0xFFFF == invertAll()
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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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void reverse();
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void select(const uint8_t pin);
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void selectN(const uint8_t pin);
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void selectNone();
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void selectAll();
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int lastError();
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private:
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uint8_t _address;
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uint16_t _dataIn;
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uint16_t _dataOut;
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uint16_t _buttonMask;
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int _error;
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TwoWire* _wire;
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};
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// -- END OF FILE --
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