I2C communication between two STM32F7 microcontrollers

Hello.,.,

 I am working on the board which consist two STM microcontrollers (STM32F765BIT & STM32H743VIT), both are interconnected through I2C. I have generated code using STM cube , and modified as per some reference code available from stack. But I cant able to communicate between two MCU. 

Can anyone suggest how to configure two MCU using cube MX (one as Master & another as slave) .