Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Accessing HPS Pins

Hello, I know I can route HPS pins to the FPGA side but is it possible to do the opposite, route FPGA side logic to HPS part pins? Thank you
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I just checked 13.0 SP1 and I see it in the UI but it can't be enabled (yet). If you go to the pin multiplexing tab in the HPS component and scroll to the bottom you'll see some columns called "Loan I/O". The idea is that when you enable the loaner I/O you'll pop a pin triplet of signals (in, out, out_en) so that you can control the pin from your FPGA logic. This feature is indended for low speed I/O only since the HPS I/O do not share all the same capabilities as the regular FPGA I/O that you are accustom to.