69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
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/*
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* SoftI2CMaster.h -- Multi-instance software I2C Master library
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*
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* 2010-2012 Tod E. Kurt, http://todbot.com/blog/
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* 2014, by Testato: update library and examples for follow Wire’s API of Arduino IDE 1.x
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*
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*/
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#ifndef SoftI2CMaster_h
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#define SoftI2CMaster_h
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#include <inttypes.h>
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#define _SOFTI2CMASTER_VERSION 13 // software version of this library
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class SoftI2CMaster
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{
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private:
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// per object data
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uint8_t _sclPin;
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uint8_t _sdaPin;
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uint8_t _sclBitMask;
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uint8_t _sdaBitMask;
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volatile uint8_t *_sclPortReg;
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volatile uint8_t *_sdaPortReg;
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volatile uint8_t *_sclDirReg;
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volatile uint8_t *_sdaDirReg;
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uint8_t usePullups;
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// private methods
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void i2c_writebit( uint8_t c );
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uint8_t i2c_readbit(void);
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void i2c_init(void);
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void i2c_start(void);
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void i2c_repstart(void);
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void i2c_stop(void);
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uint8_t i2c_write( uint8_t c );
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uint8_t i2c_read( uint8_t ack );
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public:
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// public methods
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SoftI2CMaster();
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SoftI2CMaster(uint8_t sclPin, uint8_t sdaPin);
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SoftI2CMaster(uint8_t sclPin, uint8_t sdaPin, uint8_t usePullups);
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void setPins(uint8_t sclPin, uint8_t sdaPin, uint8_t usePullups);
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uint8_t beginTransmission(uint8_t address);
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uint8_t beginTransmission(int address);
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uint8_t endTransmission(void);
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uint8_t write(uint8_t);
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void write(uint8_t*, uint8_t);
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void write(int);
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void write(char*);
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void begin(void) {return;};
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uint8_t requestFrom(int address);
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uint8_t requestFrom(uint8_t address);
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uint8_t read( uint8_t ack );
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uint8_t read();
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uint8_t readLast();
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};
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#endif
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