kopia lustrzana https://github.com/Jean-MarcHarvengt/MCUME
133 wiersze
4.2 KiB
C++
133 wiersze
4.2 KiB
C++
/*
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TwoWire.h - TWI/I2C library for Arduino & Wiring
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Copyright (c) 2006 Nicholas Zambetti. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Modified 2012 by Todd Krein (todd@krein.org) to implement repeated starts
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Modified December 2014 by Ivan Grokhotkov (ivan@esp8266.com) - esp8266 support
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Modified April 2015 by Hrsto Gochkov (ficeto@ficeto.com) - alternative esp8266 support
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Modified November 2017 by Chuck Todd <stickbreaker on GitHub> to use ISR and increase stability.
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*/
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#ifndef TwoWire_h
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#define TwoWire_h
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#include "esp32-hal-i2c.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/queue.h"
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#define SDA (gpio_num_t)4
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#define SCL (gpio_num_t)5
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#define STICKBREAKER V1.0.1
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#define I2C_BUFFER_LENGTH 128
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typedef void(*user_onRequest)(void);
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typedef void(*user_onReceive)(uint8_t*, int);
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class TwoWire
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{
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protected:
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uint8_t num;
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int8_t sda;
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int8_t scl;
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i2c_t * i2c;
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uint8_t rxBuffer[I2C_BUFFER_LENGTH];
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uint16_t rxIndex;
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uint16_t rxLength;
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uint16_t rxQueued; //@stickBreaker
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uint8_t txBuffer[I2C_BUFFER_LENGTH];
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uint16_t txIndex;
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uint16_t txLength;
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uint16_t txAddress;
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uint16_t txQueued; //@stickbreaker
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uint8_t transmitting;
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/* slave Mode, not yet Stickbreaker
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static user_onRequest uReq[2];
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static user_onReceive uRcv[2];
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void onRequestService(void);
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void onReceiveService(uint8_t*, int);
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*/
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i2c_err_t last_error; // @stickBreaker from esp32-hal-i2c.h
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uint16_t _timeOutMillis;
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public:
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TwoWire(uint8_t bus_num);
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~TwoWire();
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bool begin(int sda=-1, int scl=-1, uint32_t frequency=0);
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void setClock(uint32_t frequency); // change bus clock without initing hardware
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size_t getClock(); // current bus clock rate in hz
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void setTimeOut(uint16_t timeOutMillis);
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uint16_t getTimeOut();
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uint8_t lastError();
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char * getErrorText(uint8_t err);
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//@stickBreaker for big blocks and ISR model
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i2c_err_t writeTransmission(uint16_t address, uint8_t* buff, uint16_t size, bool sendStop=true);
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i2c_err_t readTransmission(uint16_t address, uint8_t* buff, uint16_t size, bool sendStop=true, uint32_t *readCount=NULL);
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void beginTransmission(uint16_t address);
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void beginTransmission(uint8_t address);
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void beginTransmission(int address);
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uint8_t endTransmission(bool sendStop);
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uint8_t endTransmission(void);
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uint8_t requestFrom(uint16_t address, uint8_t size, bool sendStop);
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uint8_t requestFrom(uint16_t address, uint8_t size, uint8_t sendStop);
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uint8_t requestFrom(uint16_t address, uint8_t size);
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uint8_t requestFrom(uint8_t address, uint8_t size, uint8_t sendStop);
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uint8_t requestFrom(uint8_t address, uint8_t size);
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uint8_t requestFrom(int address, int size, int sendStop);
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uint8_t requestFrom(int address, int size);
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size_t write(uint8_t);
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size_t write(const uint8_t *, size_t);
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int available(void);
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int read(void);
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int peek(void);
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void flush(void);
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void onReceive( void (*)(int) );
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void onRequest( void (*)(void) );
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uint32_t setDebugFlags( uint32_t setBits, uint32_t resetBits);
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bool busy();
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};
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extern TwoWire Wire;
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extern TwoWire Wire1;
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/*
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V1.0.1 02AUG2018 First Fix after release, Correct ReSTART handling, change Debug control, change begin()
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to a function, this allow reporting if bus cannot be initialized, Wire.begin() can be used to recover
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a hung bus busy condition.
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V0.2.2 13APR2018 preserve custom SCL,SDA,Frequency when no parameters passed to begin()
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V0.2.1 15MAR2018 Hardware reset, Glitch prevention, adding destructor for second i2c testing
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*/
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#endif
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