Re: How increase counter after one second+quartus II

Altera_Forum · ‎07-25-2009

My Problem I make verilog program counter in quartus I want increase counter after one secound I use de2 board and used clock_50 in generarte clock but very high speed I wand any etting in quartus to setting clock at one secod any one help me I'm very thank you.

Please I'm very very very needly to this is idea.

Altera_Forum · ‎07-25-2009

in order to avoid clock issues, the easiest way is incrementing the counter every 50E6 cycles of the 50 MHz clock, this can be achieved using a 26 bits (ceil(log2(50e6-1))) preescaler.

always@(posedge clk_50 or negedge reset_n)
begin
	if(!reset_n)
	begin
		counter_out	<=	0;
		counter_preescaler	<=	0;
	end
	else
	begin
		if(counter_preescaler == 49999999 )
		begin
			counter_out	<=	counter_out+1;
		    counter_preescaler	<=	0;		
		end
		
		else
		
		    counter_preescaler	<=	counter_preescaler+1;		
	end
end

Altera_Forum · ‎07-26-2009

Thank you Mr parrado (http://www.alteraforum.com/forum/member.php?u=3631).