That depends. For the Cypress kits there is a USB-UART bridge implemented in the interface (program and debugging) part. So just wiring the UART Rx and Tx lines to the appropriate inputs will allow to use PuTTY to display data. Use sprintf() and UART_PutString() routines. Take care when printing floats, you'll need to increase heap size to 0x0200.
ok thank you it is more complicated than doing on the lcd