extern unsigned char i2c_eeprom_bytewrite(unsigned char i2caddr, unsigned int addr, unsigned char data);
extern unsigned char i2c_eeprom_byteread(unsigned char i2caddr, unsigned int addr);
extern unsigned char i2c_eeprom_burstwrite(unsigned char i2caddr, unsigned int addr, unsigned char *data, unsigned int bytes);
extern unsigned char i2c_eeprom_bytewrite(unsigned char i2caddr, unsigned int addr, unsigned char data);
extern unsigned char i2c_eeprom_byteread(unsigned char i2caddr, unsigned int addr);
extern unsigned char i2c_eeprom_burstwrite(unsigned char i2caddr, unsigned int addr, unsigned char *data, unsigned int bytes);