[Help] MSP430G2553 communicate with DE2 FPGA board through GPIO

In my project, the DE2 has to transfer data to computer through MSP430G2553 (this is the strict requirement). Hence, I have 2 connection must be done:

1. The communication between MSP430 and computer: I already have used  UART module on MSP430 to realize this connection.

2. The communication between DE2 and MSP430 through GPIO : Currently, I do not know how to do this. 

Could you guys here help me how to implement the second connection?. ( I just take charge of the MSP430 coding, my partner will charge on DE2).

Thank you