These tests are meant to check correct support for IDDR and ODDR primitives as well as their operation in real hardware.
ioddr_hw_test_basys3
and upload the bitstream to a Basys3 boardLED7 should blink continuously indicating that the bitstream is working.
LEDs 0 to 3 indicate error in data transmission. They all should remain off while the shorting wires are connected.