how to use SignalTap to slow the clock of DE2

Signaltap is not used for clock operations. Why do You want 1Hz clock? Use clock enables for such slow signals.

thank you so much for the reply, i am trying to monitor some LEDs in DE2 board butwith such frequency 50 Mhz, it is not possible to trace them, how could i use signal enable to be able to observe the chnages in LEDs

50MHz LED is too fast for human vision. you need a counter on 50MHz to generate a ON/OFF switch (call it enable) for some time (e.g. .5 sec ON, .5 OFF). use module 2 counter (2^27 will then overflow in about 2.7 sec, 2^27/50M), you can then use any siutable counetr MSB as LED switch.

thank you so much for the reply, what you suggest me to do, is to use a counter on 50Mhz to generate ON/OFF switch, my question is, as i wrote my VHDL codes and i alreday downloaded it in the DE2 Board and it works fine with using one push botton as clock, i could use external clock, but how to implement the counter circuit, would it be in the same VHDL program , or it could be different circuit ,,

I would offer to learn how to construct a sentence in english. Then a question in english and finally, ask here what You want. because I don't understand the question.

I don't quite get the point. You certainly need to add to your existing code and redownload it to fpga.

 
signal count : unsigned(26 downto 0);
.....
process
begin
if rising_edge(clk) then
   count <= count + 1;
end if;
end process;
 
led_sw = count(26); -- or 25 etc

thank you so much for the reply, i will try to add this process to my program and see the result and let you know,