PC to DE2-115 USB Communication

Forgive me - I've just re-read you first post about trying the USB Device example. I agree - there is little (no) documentation. So, if your not comfortable unpicking the example code - perhaps not.

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transferring data from a PC to DE2-115 through USB

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Is the "USB" a requirement? If so, then I agree with flz47655 - an external FTDI solution means you just end up with an emulated serial port on your PC to communicate with.

If "USB" is not a requirement then there is a straightforward serial port on the DE2-115 board. That's as simple as they come.

Cheers,

Alex