Receiving LVDS using NIOS II

You'll need to provide a better description of what you are trying to do.

What does the LVDS signal 'mean' to you or the NIOS processor?

Is it data from an analog-to-digital converter? Is it an interrupt? What is the NIOS processor going to do once it 'gets' this LVDS signal.

There's nothing particularly special about LVDS signals. Its just another logic standard. If the LVDS signal you are looking at has a frequency about the same as the NIOS processor, then its really no different than any other I/O. If the LVDS signal is much faster than the NIOS processor clock, then the LVDS SERDES would be used to deserialize the LVDS signal into blocks of bits, eg. 8-bits per NIOS clock. The NIOS processor would then have to process blocks of bits (or blocks of samples).

Cheers,

Dave