62 lines
1.4 KiB
C++
62 lines
1.4 KiB
C++
#include "EEPROM_I2C.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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void EEPROM_I2C::begin(){
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Wire.begin();
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}
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void EEPROM_I2C::writeByte(unsigned int eeaddress, byte data){
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int rdata = data;
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this->_beginTransmission(eeaddress);
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Wire.write(rdata);
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this->_endTransmission();
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}
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byte EEPROM_I2C::readByte(unsigned int eeaddress){
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int rdata;
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this->_beginTransmission(eeaddress);
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this->_endTransmission();
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Wire.requestFrom(DEVICEADDRESS,1);
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if (Wire.available()) rdata = Wire.read();
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return rdata;
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}
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void EEPROM_I2C::writePage(unsigned int eeaddress, byte* data, byte length ){
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this->_beginTransmission(eeaddress);
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byte c;
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for ( c = 0; c < length; c++)
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Wire.write(data[c]);
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this->_endTransmission();
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delay(10); // need some delay
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}
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void EEPROM_I2C::readBuffer(unsigned int eeaddress, byte *buffer, int length ){
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this->_beginTransmission(eeaddress);
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this->_endTransmission();
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Wire.requestFrom(DEVICEADDRESS,length);
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for ( int c = 0; c < length; c++ )
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if (Wire.available()) buffer[c] = Wire.read();
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}
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void EEPROM_I2C::_beginTransmission(unsigned int eeaddress){
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Wire.beginTransmission(DEVICEADDRESS);
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Wire.write((eeaddress >> 8)); // Address High Byte
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Wire.write((eeaddress & 0xFF)); // Address Low Byte
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}
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void EEPROM_I2C::_endTransmission(){
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Wire.endTransmission();
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} |