clock generator with max II micro Kit

Hi Radoune,

It is you again? I thought you done it and is having a demo...

What is your source clk frequency? this what matters most. now

hi

thank you first of all, now I had the board on which I will test my program, my input frequency is 50Mhz

Ok, consider generating clk-enable instead of clk. I mean apply 50MHz to all design but when you want 8KHz apply its enable and when you want 256KHz apply the other enable.

if this good for your design then:

to generate clk-enable at 8KHz from 50MHz you need to divide your clock by

50,000/8 = 6250 (integer result)

to generate clk-enable at 256KHz from 50MHz you need to divide your clock by 50,000/256 = 195.3125 (non-integer).

This non-integer gets nasty but don't worry. If you can change source clk frequency you may get rid of this problem easily, otherwise you can do amodulo adder(for both cases) as follows:

for 8KHz:

get a counter that runs freely and continuously from 0 to 6249 on your 50MHz clock adding 1 each time.

if count = 6249 then

count <= 0;

en1 <= '1';

else

count <= count + 1;

en1 <= '0';

end if;

so this easy,just a counter, you can call 1 modulo 6250

for 256KHz:

get another counter that counts from 0 to (50000+256) adding 256 each time.

if count2 >= 50000 then

count2 <= count2 +256 -50000; -- wrap up

en2 <= '1';

else

count2 <= count2 + 256;

en2 <= '0';

end if;

this is a bit more difficult, it is 256 modulo 50000

You will need to complete and test the code, I haven't debugged it(straight from my head)