Do a little change to "SCI_echoback" example with F28335

Hi all,

I want to do a little a change to "SCI_echoback" example in ControlSuite with F28335. If I run the original echoback example, when I type a character in Hyperterminal, it will echo it back immediately. 

What I want to do is when I type a string in hyperterminal and punch an enter, the string will be sent to F28335, and F28335 will echo it back to Hyperterminal. Dose anyone have any idea on how to change the "SCI_echoback" code?

Any help will be really appreciated.

Fei