PC to DE2-115 USB Communication

You can use:

- JTAG UART (low performance but very simple with NIOS and Altera IP)

- Gigabit Ethernet (very difficult, require understanding of timings, etc.)

or for good performance (40MByte/s) you can add an external USB to FIFO module like UM232H to exploit USB 2.0 performance. This require some work.

A simpler way is to add an external USB to UART external module (typ 115.200 bps/s).