Can anyone help me check my codes? I implemented it, but when I run on Modelsim, there doesnt seem to be any data coming out of my FIFO during the clock cycles... my source is at http://www.mediafire.com/?nxnttnn1nbq
FiFo Help Needed
Started by ●July 3, 2008
Reply by ●July 4, 20082008-07-04
On Jul 4, 10:44=A0am, Zhane <m...@hotmail.com> wrote:> Can anyone help me check my codes? > > I implemented it, but when I run on Modelsim, there doesnt seem to be > any data coming out of my FIFO during the clock cycles... > > my source is athttp://www.mediafire.com/?nxnttnn1nbqim getting this error when I do my simulation with Modelsim # ** Warning: Design size of 11167 statements or 0 non-Xilinx leaf instances exceeds ModelSim XE-Starter recommended capacity. in my simulation it looks as if nothing has been written into the FIFO even when I enable wr_en
Reply by ●July 4, 20082008-07-04
"Zhane" <me75@hotmail.com> wrote in message news:39230673-45bb-4f5e-ac0f-57cc904713b3@i36g2000prf.googlegroups.com...> im getting this error when I do my simulation with Modelsim > # ** Warning: Design size of 11167 statements or 0 non-Xilinx leaf > instances exceeds ModelSim XE-Starter recommended capacity.Wich means that your ModelSim license doesn't allow for simulating design of such size. /Mikhail
Reply by ●July 4, 20082008-07-04
On Jul 4, 11:43=A0am, "MM" <mb...@yahoo.com> wrote:> "Zhane" <m...@hotmail.com> wrote in message > > news:39230673-45bb-4f5e-ac0f-57cc904713b3@i36g2000prf.googlegroups.com... > > > im getting this error when I do my simulation with Modelsim > > # ** Warning: Design size of 11167 statements or 0 non-Xilinx leaf > > instances exceeds ModelSim XE-Starter recommended capacity. > > Wich means that your ModelSim license doesn't allow for simulating design=of> such size. > > /Mikhailhmm so is my codes right?
Reply by ●July 4, 20082008-07-04
On Jul 4, 1:04=A0pm, Zhane <m...@hotmail.com> wrote:> On Jul 4, 11:43=A0am, "MM" <mb...@yahoo.com> wrote: > > > "Zhane" <m...@hotmail.com> wrote in message > > >news:39230673-45bb-4f5e-ac0f-57cc904713b3@i36g2000prf.googlegroups.com..=.> > > > im getting this error when I do my simulation with Modelsim > > > # ** Warning: Design size of 11167 statements or 0 non-Xilinx leaf > > > instances exceeds ModelSim XE-Starter recommended capacity. > > > Wich means that your ModelSim license doesn't allow for simulating desi=gn of> > such size. > > > /Mikhail > > hmm so is my codes right?or rather... how can I simulate the FIFO?
Reply by ●July 4, 20082008-07-04
> or rather... how can I simulate the FIFO?If you can afford it upgrade your license. If you can't afford it try partial simulations or see if you can find a less resrtictive free simulator, or get an evaluation license, etc.. /Mikhail
Reply by ●July 4, 20082008-07-04
Zhane wrote:> # ** Warning: Design size of 11167 statements or 0 non-Xilinx leaf > instances exceeds ModelSim XE-Starter recommended capacity.Why does it take 11,167 statements to describe a fifo? See http://mysite.verizon.net/miketreseler/sync_fifo.vhd
Reply by ●July 5, 20082008-07-05
On Jul 4, 11:38=A0pm, Mike Treseler <mtrese...@gmail.com> wrote:> Zhane wrote: > > # ** Warning: Design size of 11167 statements or 0 non-Xilinx leaf > > instances exceeds ModelSim XE-Starter recommended capacity. > > Why does it take 11,167 statements to describe a fifo? > Seehttp://mysite.verizon.net/miketreseler/sync_fifo.vhdno idea I used the Core generator to generate and used the structural one to simulate and end up getting that error
Reply by ●July 7, 20082008-07-07
On Jul 5, 3:43 am, Zhane <m...@hotmail.com> wrote:> On Jul 4, 11:38 pm, Mike Treseler <mtrese...@gmail.com> wrote: > > > Zhane wrote: > > > # ** Warning: Design size of 11167 statements or 0 non-Xilinx leaf > > > instances exceeds ModelSim XE-Starter recommended capacity. > > > Why does it take 11,167 statements to describe a fifo? > > Seehttp://mysite.verizon.net/miketreseler/sync_fifo.vhd > > no idea > I used the Core generator to generate > and used the structural one to simulate > and end up getting that errorIt is not an error, only a warning. It does not prevent you from simulating the design. It only states that your license type will force ModelSim to run very slowly. However I think this has nothing to do with your problem simulating. What do you mean by "there doesnt seem to be any data coming out of my FIFO during the clock cycles"? Can you look at the simulation and see that the data is going in to the FIFO and the write enable is active? Does the FIFO become non-empty and read enable asserted? Have you dealt with the global reset for the core model? Perhaps it's always being held reset? Regards, Gabor
Reply by ●July 7, 20082008-07-07
On Jul 7, 8:26=A0pm, Gabor <ga...@alacron.com> wrote:> On Jul 5, 3:43 am, Zhane <m...@hotmail.com> wrote: > > > On Jul 4, 11:38 pm, Mike Treseler <mtrese...@gmail.com> wrote: > > > > Zhane wrote: > > > > # ** Warning: Design size of 11167 statements or 0 non-Xilinx leaf > > > > instances exceeds ModelSim XE-Starter recommended capacity. > > > > Why does it take 11,167 statements to describe a fifo? > > > Seehttp://mysite.verizon.net/miketreseler/sync_fifo.vhd > > > no idea > > I used the Core generator to generate > > and used the structural one to simulate > > and end up getting that error > > It is not an error, only a warning. =A0It does not prevent you from > simulating > the design. =A0It only states that your license type will force ModelSim > to run very slowly. =A0However I think this has nothing to do with your > problem simulating. > > What do you mean by "there doesnt seem to be > any data coming out of my FIFO during the clock cycles"? =A0Can you look > at the simulation and see that the data is going in to the > FIFO and the write enable is active? =A0Does the FIFO become non-empty > and read enable asserted? =A0Have you dealt with the global reset > for the core model? =A0Perhaps it's always being held reset? > > Regards, > Gaborerm i've found it I didnt expand my timing far enough to observe the data output.
