mirror of
https://github.com/xreef/PCF8574_library.git
synced 2024-08-30 18:12:18 +00:00
102 lines
2.0 KiB
C++
102 lines
2.0 KiB
C++
/** \mainpage PCF8574 library
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*
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* MIT license
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* written by Renzo Mischianti
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*/
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#ifndef PCF8574_h
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#define PCF8574_h
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#include "Wire.h"
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#if 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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// Uncomment to enable printing out nice debug messages.
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// #define PCF8574_DEBUG
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// Define where debug output will be printed.
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#define DEBUG_PRINTER Serial
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// Setup debug printing macros.
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#ifdef PCF8574_DEBUG
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#define DEBUG_PRINT(...) { DEBUG_PRINTER.print(__VA_ARGS__); }
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#define DEBUG_PRINTLN(...) { DEBUG_PRINTER.println(__VA_ARGS__); }
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#else
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#define DEBUG_PRINT(...) {}
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#define DEBUG_PRINTLN(...) {}
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#endif
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#define READ_ELAPSED_TIME 10
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//#define P0 B00000001
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//#define P1 B00000010
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//#define P2 B00000100
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//#define P3 B00001000
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//#define P4 B00010000
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//#define P5 B00100000
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//#define P6 B01000000
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//#define P7 B10000000
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//
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#define P0 0
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#define P1 1
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#define P2 2
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#define P3 3
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#define P4 4
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#define P5 5
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#define P6 6
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#define P7 7
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#include <math.h>
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class PCF8574 {
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public:
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struct DigitalInput {
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uint8_t p0;
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uint8_t p1;
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uint8_t p2;
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uint8_t p3;
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uint8_t p4;
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uint8_t p5;
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uint8_t p6;
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uint8_t p7;
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} digitalInput;
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PCF8574(uint8_t address);
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PCF8574(uint8_t address, uint8_t sda, uint8_t scl);
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PCF8574(uint8_t address, uint8_t interruptPin, void (*interruptFunction)() );
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PCF8574(uint8_t address, uint8_t sda, uint8_t scl, uint8_t interruptPin, void (*interruptFunction)());
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void begin();
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void pinMode(uint8_t pin, uint8_t mode);
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void readBuffer(bool force = true);
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uint8_t digitalRead(uint8_t pin);
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DigitalInput digitalReadAll(void);
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void digitalWrite(uint8_t pin, uint8_t value);
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private:
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uint8_t _address;
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uint8_t _sda = SDA;
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uint8_t _scl = SCL;
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bool _usingInterrupt = false;
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uint8_t _interruptPin = 2;
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void (*_interruptFunction)(){};
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byte writeMode = B00000000;
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byte readMode = B00000000;
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byte byteBuffered = B00000000;
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unsigned long lastReadMillis = 0;
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byte writeByteBuffered = B00000000;
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};
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#endif
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