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https://github.com/RobTillaart/Arduino.git
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83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
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#pragma once
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//
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// FILE: I2C_24LC1025.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.3
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// PURPOSE: I2C_24LC1025 library for Arduino with EEPROM 24FC1025 et al.
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// HISTORY: See I2C_24LC1025.cpp
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// URL: https://github.com/RobTillaart/I2C_24LC1025
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#include "Arduino.h"
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#include "Wire.h"
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#define I2C_24LC1025_VERSION (F("0.1.3"))
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#define I2C_DEVICESIZE_24LC512 131072
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#define I2C_24LC1025_PAGESIZE 128
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class I2C_24LC1025
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{
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public:
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I2C_24LC1025(uint8_t deviceAddress, TwoWire *wire = &Wire);
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#if defined (ESP8266) || defined(ESP32)
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bool begin(uint8_t sda, uint8_t scl);
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#endif
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bool begin();
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bool isConnected();
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// writes a byte to memaddr
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int writeByte(const uint32_t memoryAddress, const uint8_t value);
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// writes length bytes from buffer to EEPROM
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int writeBlock(const uint32_t memoryAddress, const uint8_t *buffer, const uint32_t length);
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// set length bytes in the EEPROM to the same value.
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int setBlock(const uint32_t memoryAddress, const uint8_t value, const uint32_t length);
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// returns the value stored in memaddr
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uint8_t readByte(const uint32_t memoryAddress);
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// reads length bytes into buffer
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uint32_t readBlock(const uint32_t memoryAddress, uint8_t *buffer, const uint32_t length);
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// updates a byte at memory address, writes only if there is a new value.
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// return 0 if data is same or written OK, error code otherwise.
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int updateByte(const uint32_t memoryAddress, const uint8_t value);
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// updates a block in memory, writes only if there is a new value.
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// only to be used when you expect to write same buffer multiple times.
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// test your performance gains!
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int updateBlock(const uint32_t memoryAddress, const uint8_t* buffer, const uint32_t length);
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uint32_t getDeviceSize() { return _deviceSize; };
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uint8_t getPageSize() { return _pageSize; };
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uint32_t getLastWrite() { return _lastWrite; };
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private:
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uint8_t _deviceAddress;
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uint8_t _actualAddress; // a.k.a. controlByte
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uint32_t _lastWrite;
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uint32_t _deviceSize = I2C_DEVICESIZE_24LC512;
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uint8_t _pageSize = I2C_24LC1025_PAGESIZE;
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int _error; // TODO.
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void _beginTransmission(uint32_t memoryAddress);
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int _pageBlock(uint32_t memoryAddress, const uint8_t* buffer, const uint16_t length, const bool incrBuffer);
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int _WriteBlock(uint32_t memoryAddress, const uint8_t* buffer, const uint8_t length);
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int _ReadBlock(uint32_t memoryAddress, uint8_t* buffer, const uint8_t length);
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TwoWire * _wire;
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bool _debug = true;
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};
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// -- END OF FILE --
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