Signal output cannot be synthesized, bad synchronous description.

Hi bretulus,

I had used the same logic to do this task.

I dont need to generate plsrep but i need to output my clock pulse (clk_plstr in my code) until the counting reach to some value(pls in my code).

The coding that I did for this is following:

process(clk_plstr,plsrep) ---to reset counter

begin

if rising_edge(plsrep)then

count_reg<= B"000000000000" ;

elsif(clk_plstr'event and clk_plstr='1')then

count_reg<=count_next;

end if;

if(clk_plstr'event and clk_plstr = '1')then

if(count_reg<=pls )then

output<='0';

else

output<='1';

end if;

else

output<='0';

end if;

end process;

count_next <=count_reg+'1' when(count_reg=B"000000000000" and plsrep='1') else

count_reg when (count_reg=B"000000000000") else

count_reg+'1' when (count_reg<pls)else

B"000000000000";

fout<=output; -----output the clock clk_plstr

This gives me the same error as:

"Signal output cannot be synthesized, bad synchronous description. The description style you are using to describe a synchronous element (register, memory, etc.) is not supported in the current software release."

I am not sure how I can perform this task.

Thank you very much.