Hi, the comunication it's easy, use PE on CW to generate the IIC routine, use sendblock to write a command (2 bytes, register + value),remember to place the device address on PE configuration.
To receive, write a byte for register selection and get a byte readign the value.
If you like there is an example with code on EVB tools for MPR084, but in that case the IIC is done by software routine, not from HW periferal. You can get the procedure and value.
Roberto