Honored Contributori have downloaded my program to DE2 board, but it seems no clock , so the sequence is not working for the program , all LEDs are on all the time, when i push the reset which is made through the push botton, all lights go off, so i think the clock is not enabled, is here any one who could help me
thanks to every one
Honored ContributorAs the user manual clarifies, the 50 MHz clock connects to FPGA pin N2, it's also declared as pin CLOCK_50 in most example designs. You just have to use it in your design.
Honored Contributorthank you alot for the reply i alreday use the CLOCK_50 in my VHDL design instaed of clk that i used , but it is still the same, i think i need to make some dely between every state as the frequncy is 50Mhz(200 ns) and can not be recognized by human being, the machine moves from state a and in the next rising edge , it moves tio state B and then C, so can not see flashing
Honored ContributorIf I understand right, you now discovered, that your design is working as expectable.
Your considerations about the impossibility of tracing design operation at 50 MHz by looking at a LED display sound plausible, if no external events are needed to advance the state machine. Normally, people are feeding a 50 MHz clock to a design, because they want it to act fast. To visualize it's operation, you can use test tools like SignalTap - or a slow clock.Honored Contributorthank you so much for the reply, i do test my program by manaual clock it works fine, and i can trace the changing of the LEDs, but i really want to try the program by the internal clock, so how to slow the clock to the frequncy that i can trace my LEDs changes,
your help is highly apprecaited
