I got all the way to Lab 6 using ISE14.2 and programmed the FPGA to the point where I can interactively play with LED brightness 1-9. I used the main.c that was in the solution for lab 6 and should theoretically be able to push the pushbuttons and get interrupts and alter the brightness. sometimes they work with VERY SLOW delay and only update brightness to 2 regardless of which ones I press, in what order, or how many times, and other times they do not work at all (meaning I get no interrupt response when I press them).
What gives?