Forum Discussion
DGall10
New Contributor
New ContributorBug fix for Quartus 13 .0 or 13.0 sp1 that fixes OR gates acting like AND gates and AND gates acting like OR gates
HI, Im using a RioRand and discovered that when I OR 2 signals either in VHDL or schematic they act like an AND gate and ANDing 2 signals acts like an OR gate. IS there a fix for this?
DGall10New Contributor
New ContributorHi Anand, thanls! I look there in RTL viewer. The schematic of the board that I found didn't seem to indicate one way or the that I could tell
ak6dn
Regular Contributor
Regular ContributorYou don't indicate what pins your switches connect to, but based on your comment about the pullups enabled I believe they are implemented as active low, so when you push the switch the input goes to '0', normally it will be a logic '1'.
Your LED drivers on the schematic (LED1, LED2) are active low as well. So you need to drive the output to logic '0' to light the LED.
