I have successfully created a hello world project. The problem comes when I create a Peripheral test project. It works fine, but I believe that the LEDs should be blinking, which they don't. The system only returns that all the peripherals are working correctly. I have even modified the source code to print out which LED should be illuminated. I am using ISE 14.6 and at the planahead project I checked and the UCF for the LEDs is correct.
#
# pin constraints
#
NET GPIO_SW_TRI_IO LOC = "G19" | IOSTANDARD = "LVCMOS25";
NET LEDs_4Bits_TRI_IO[0] LOC = "P17" | IOSTANDARD = "LVCMOS25";
NET LEDs_4Bits_TRI_IO[1] LOC = "P18" | IOSTANDARD = "LVCMOS25";
NET LEDs_4Bits_TRI_IO[2] LOC = "W10" | IOSTANDARD = "LVCMOS25";
NET LEDs_4Bits_TRI_IO[3] LOC = "V7" | IOSTANDARD = "LVCMOS25";
#
# additional
Any idea what might be wrong?