printf() in Atollic Truestudio for STM32F769I-DISCO board

Hello everyone, 

Can anyone point me how to use printf() for this specific environment?

I did the following so far:

1. Initialized UART3 since it's connected to the USB

2. I am using HAL_UART_Transmit(&huart3, &data, 1, 100); to send characters via UART.

3. I am using putty to view the output from the COM port. 

Any pointers?

Thanks in advance and for your time

Dheeraj