EK-TM4C1294XL: using a uart other than U0 with uart echo example

I have the jumpers on the EK set up to connect U5Rx with TARGET_RX_D and U5Tx with TARGET_TX_D.

The code for the uart echo project has been modified for uart 5. Is this enough to receive and transmit through

the VCP? The PuTTY terminal displays enter text, so the uartSend function works with uart 5. But no characters

seem to be received from the keyboard-- the UARTIntHandler function is not being reached.

Thanks,

Priya