Modelsim simulation not work :(

Question

Hi everyone

I try to start using nios2 5.1 - i use 1.0sp1 before

I have a problem with simulation in Modelsim 6.0

my step's is next below :

1. open - 100% worked project based on nios2 1.0 sp1

2. add Jtag debug level 1 to processor and regenerate system in SOPC 5.1

3. import old 100% working software IDE design and successful recompile it.

4. select Modelsim only, no hardware support in system library

here is snapshot http://slil.ru/22672193/1967767657/work_space1.jpg (http://slil.ru/22672193/1967767657/work_space1.jpg)

5. successful recompile C code

6. in IDE select RUN->RUN AS->NiosII Modelsim

7. in Modelsim select Tools ->execute macro - and select setup_sim.do

8. After this i press s in console to recompile design

9. press w to get timing diagramm

10. write in console run 500 us

and got this in my screen

here is picture of my diagram

http://slil.ru/22672170/1967767657/work_space.jpg (http://slil.ru/22672170/1967767657/work_space.jpg)

To many strange errors and simulation always stops.

How to fix this ?

What i miss ?

This way was work in previous version without any problem.

altera_forum · Answer

Just a guess, but there seems to be some undefined input signal, that corrupts the other signals. When changing to the new version, maybe some pins/addresses/whatever changed and there is an unconnected input or something?

altera_forum · Answer

No i think i&amp;#39;t  more complicate and deep problem with NIOS51 !   Because in NIOS2 1.01 sp1 it work and just after compiling in NIOS51 the same thing is not work  I was try in development kit 1C20 - the same - is not possible to simulate runing of nios2 in modelsim !!!!!!!!!!!!!!!!!!!!!!!!  http://forum.niosforum.com/work2/style_emoticons/&lt;#EMO_DIR#&gt;/mad.gif   http://forum.niosforum.com/work2/style_emoticons/&lt;#EMO_DIR#&gt;/mad.gif   http://forum.niosforum.com/work2/style_emoticons/&lt;#EMO_DIR#&gt;/mad.gif   http://forum.niosforum.com/work2/style_emoticons/&lt;#EMO_DIR#&gt;/mad.gif   http://forum.niosforum.com/work2/style_emoticons/&lt;#EMO_DIR#&gt;/mad.gif   http://forum.niosforum.com/work2/style_emoticons/&lt;#EMO_DIR#&gt;/mad.gif   Now i must revert to my working nios2 1.0 sp !!!!!!

altera_forum · Answer

Hello experts http://forum.niosforum.com/work2/style_emoticons/&lt;#EMO_DIR#&gt;/smile.gif  i want to bring this topic up again !   How simulate NIOS2 5.1 in modelsim ?  this feature is not work !!!!

altera_forum · Answer

--- Quote Start ---  originally posted by alexs@Apr 16 2006, 10:47 PM hello experts http://forum.niosforum.com/work2/style_emoticons/&lt;#emo_dir#&gt;/smile.gif  i want to bring this topic up again !   how simulate nios2 5.1 in modelsim ?  this feature is not work !!!! &lt;div align='right'&gt;&lt;{post_snapback}&gt; (index.php?act=findpost&amp;pid=14420)  --- quote end ---    --- Quote End ---    Hi AlexS,  I took a look at your diagram and it seems that the d_irq signal that feeds into the Nios II CPU looks to have a Z input right after the reset signal is released (0000000Z&amp;#39;b).  I would expect simulation to "fail" when an undefined input is driven into logic.  Everything on the Nios II processor goes to high-impedence (red) after that Z input to the d_irq from the system inputs.  I would consider looking at all your components that use irq to the Nios II processor to trace back their source.   One idea may be to remove each component from the system to see if the problem goes away.  Regards, -ATJ

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Modelsim simulation not work :(

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