Simulation and Verification

[jhinkle]

I am using the WEB based free tools.

I have been simulating for the last two days just fine.

Mid-day today - I bring up the simulator and it will not let me restart the simulation, change end-point time - nothing.

The following is showing on the console window - don't know if it gives any clue - but prior to this - I never had a message about the default WCFG file.

Any comments would be very helpful.

Thanks.

Joe

ISim P.15xf (signature 0x2f00eba5)

WARNING: A WEBPACK license was found.

WARNING: Please use Xilinx License Configuration Manager to check out a full ISim license.

WARNING: ISim will run in Lite mode. Please refer to the ISim documentation for more information on the differences between the Lite and the Full version.

This is a Lite version of ISim.

Time resolution is 1 ps

Simulator is doing circuit initialization process.

Finished circuit initialization process.

[jhinkle]

I found it has something to do with the Signal "ClockIn" frequency.

if I use :

initial begin
 
          ClockIn = 0;
        forever ClockIn = #(10 / 2) ~ ClockIn;
    end

  initial begin

it works!.

initial begin
 
          ClockIn = 0;
        forever ClockIn = #(50 / 2) ~ ClockIn;
    end

  initial begin

it fails.

My clock is not fast - around 2mhz so I don't want to use a super fast one in simulation.

Any ideas?

Thanks.

Joe

[chandrajit_pal]

hi,

     from your first post it seems that the lifetime  of the evaluation ISIM is over or you can also browse for the license once again by refreshing it, if it does not work then you have to check out with the full version of ISE design suite. Its not your logical fault...seems so...

best Regards