This forum is dedicated to the Cypress software issues. It seems that you are using PSoC4 board. You will get faster responses if you post your questions in the PSoC4 MCU specialized forum:
I also recommend first describing your project goals, not particular implementation issues. This way experienced users can provide better assistance. For example, here it is not clear why you intend to use external I2C chip, when PSoC already has a built-it hardware part.