D:\Users\Neo\Documents\Arduino\libraries\OLED_I2C\hardware/avr/HW_AVR.h: In member function 'void OLED::_initTWI()':
D:\Users\Neo\Documents\Arduino\libraries\OLED_I2C\hardware/avr/HW_AVR.h:14:9: error: 'TWSR' was not declared in this scope
__cbi2(TWSR, TWPS0);
D:\Users\Neo\Documents\Arduino\libraries\OLED_I2C\hardware/avr/HW_AVR.h:14:15: error: 'TWPS0' was not declared in this scope
__cbi2(TWSR, TWPS0);
^
D:\Users\Neo\Documents\Arduino\libraries\OLED_I2C\hardware/avr/HW_AVR.h:15:15: error: 'TWPS1' was not declared in this scope

__cbi2(TWSR, TWPS1);

D:\Users\Neo\Documents\Arduino\libraries\OLED_I2C\hardware/avr/HW_AVR.h:16:2: error: 'TWBR' was not declared in this scope

TWBR = ((F_CPU / TWI_FREQ) - 16) / 2;

D:\Users\Neo\Documents\Arduino\libraries\OLED_I2C\hardware/avr/HW_AVR.h:19:2: error: 'TWCR' was not declared in this scope

TWCR = _BV(TWEN) | _BV(TWIE)/* | _BV(TWEA)*/;