[SOLVED] how to increment a counter for 5 cycles.

[prashanthi999]

hello every one, i have a doubt how to increment a counter for every 5 cycles not that
" for single cycle the count will be incrementing " i want to increment a counter for every 5 cycles ,
for eg: here in my code i have incremented for every single clock cycle but i want to increment a count for 5 clock cycles , so that it will stay as "5" for the first 5 clock cycles and "10" for the next five clock cycles and so on. plz guide me.

process(clk,reset)
   begin
		if(clk'event and clk='1') then
		    if(reset ='1') then
		       temp <= (others=>'0');
		       temp1<= (others=>'0');
		    else
		       temp<=temp1;
		       temp1<=temp1 + 5;
		    end if;
		  end if;
		end process;

 

[TrickyDicky]

try using 2 counters
1 counts on every clock
count2 increments when count1 = 5. reset count1. Etc.

 

[prashanthi999]

as per ur midifications i designed it , is this it!!

entity trial is
    Port ( clk : in  STD_LOGIC;
           reset : in  STD_LOGIC;
           dataout : out  STD_LOGIC_VECTOR (31 downto 0));
end trial ;

architecture Behavioral of trial is
signal temp : std_logic_vector(31 downto 0);
signal temp1 : std_logic_vector(31 downto 0);
begin
 
dataout <= temp1;


   process(clk)
--   begin
--		if(clk'event and clk='1') then
--		    if(reset ='1') then
--		       temp <= (others=>'0');
--		        else
--		       temp<=temp + 1;
--		    end if;
--		  end if;
--		end process;


      process(clk)
--   begin
--		if(clk'event and clk='1') then
--		    if(reset ='1') then
--		       temp1 <= (others=>'0');
--		        else
--		       if (temp=5) then
                           temp1 <= temp1+5;
                      end if;
--		    end if;
--		  end if;
--		end process;

end Behavioral;

 

[ads-ee]

No, it's not, and the code is all commented out.

temp should count like this: 0,1,2,3,4, 0,1,2,3,4, 0... , so temp needs to be set back to 0 each time it reaches 4.

temp1 should count 0,1,2,3,4,5,6,.... every time temp == 4, checking for temp == 5 would end up with 6 counts each time 0,1,2,3,4,5. What is up with so many students NOT knowing this!?

Now try again using the above logic.

 

[prashanthi999]

il remove commets sir, im counting from 5,10,15,20 ,,, not 1,2,3,4, so i used temp1+5, 1st process i checked seperately its working , sir second process is just adding 5 to it, not counting !!!
in the second process i made for temp=0 , temp1<=temp+5 , since 5th cycle coming at (temp=0).

entity abha is
    Port ( clk : in  STD_LOGIC;
           reset : in  STD_LOGIC;
           dataout : out  STD_LOGIC_VECTOR (31 downto 0));
end abha;

architecture Behavioral of abha is
signal temp : std_logic_vector(31 downto 0);
signal temp1 : std_logic_vector(31 downto 0);
begin
 
dataout <= temp1;

process(clk)
   begin
		if(clk'event and clk='1') then
		    if(reset ='1') then
		     temp <= (others=>'0');
		     else
		     if(temp=4) then 
			  temp<=x"00000000"; else 
			  temp<= temp+1;
			  end if;
			  end if;
		  end if;
		end process;


process(clk)
   begin
		if(clk'event and clk='1') then
		    if(reset ='1') then
		      if(temp=0) then 
				temp1<=temp;
			  temp1<=temp+5; else 
			  temp1<= x"00000000";
			  end if;
			  end if;
		  end if;
		end process;

- - - Updated - - -

hey it worked thanx a lot
.

entity abha is
    Port ( clk : in  STD_LOGIC;
           reset : in  STD_LOGIC;
           dataout : out  STD_LOGIC_VECTOR (31 downto 0));
end abha;

architecture Behavioral of abha is
signal temp : std_logic_vector(31 downto 0);
signal temp1 : std_logic_vector(31 downto 0);
begin
 
dataout <= temp1;

process(clk)
   begin
		if(clk'event and clk='1') then
		    if(reset ='1') then
		     temp <= (others=>'0');
		     else
		     if(temp=4) then 
			  temp<=x"00000000"; else 
			  temp<= temp+1;
			  end if;
			  end if;
		  end if;
		end process;


process(clk)
   begin
		if(clk'event and clk='1') then
		    if(reset ='1') then
			      temp1<= x"00000000";
					else
		      if(temp=0) then 
				  temp1<=temp1+5;
			  end if;
			  end if;
		  end if;
		end process;

end Behavioral;

 

[prashanthi999]

hello every one , can we count in any manner , my aim is i want to count in a sequence like 2345,78910,12131415 and so on removing every 5th element(i.e 6,11,16,21,26....) can we do that??

 

[ads-ee]

Yes, next question...

























oh, wait you want the answer, since you can't figure it out.

if (cnt5 < 4) then
  count <= cnt5 +1;
else
  cnt5 <= 0;
end if;

if (cnt5 == 4) then
  count <= count +2;
else
  count <= count +1;
end if;

There that skips every 5th count value.

 

[prashanthi999]

hey thanx for the code , it worked