button with fpga pull up, gnd

Thanks for reply. My task is to connect a button to fpga port, configure one pin as GND, other as pull up, and drive a LED depending on button state. I attached picture illustrating it.

Problems is that I don't know how to correctly assign pull up.

I tried using tri1 with directions:

output - measured 3.333V. LED all time off.

input - measured 3V. When button not pressed - LED off, when pressed On.

inout - measured ~200mV. When button not pressed - LED off, when pressed On. It works, but even if I touch the pins metal with finger, the LED turns on.

At last I got It woking as input.

Iam using Aldec- HDL, in block diagram I changed pin direction in module and terminal direction equally.

module link_klavos2 (q, c, r );

output wire q;

inout tri1 c;

output reg r;

initial begin r = 0; end

assign q = ~c;

endmodule