Hello
I'm trying to simulate a simple D Flip Flop in xilinx 14.7.I've wrote the testbench and I set the modelsim as simulator an I did the behavioral simulation without any problem but when I try to simulate the place & route simulation I can't see the result.
This is my code :
It looks like GSR is a weak 1 after 0 ns. It is initialized to 1 then 0 after 100 ns in the glbl.v, so you started applying your simulation stimulus too soon as it's still in reset.
The reason the behavioral result works is due to being a behavioral description that does not require glbl.v so is not in reset when the D input has a 1 on it.
You should also fix your reset it's way too short (it's not even a full clock cycle wide)