Forum Discussion

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

DE0 board, mysterious LED behavior

I've recently been testing out a daughtercard I made for the DE0 board which includes a motor driver and connector for a quadrature encoder. I was testing some code I wrote to decode the quadrature ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Simply consider, that any top design port signal is implemented as I/O pin. I didn't think yet about if it's absolutely necessary, I'm just used to it. Furthermore, Quartus has the option of defining virtual pins that are ignored in I/O assignment, but I fear it may be unavailable in the free Quartus Web edition. I don't use schematic designs, so I can't say if they have a means to specify virtual pins.