simulation stopped due to inactivity!

[Altera_Forum]

hello everybody: 

recently I did some simulation in modelsim-altera6.5 according to AN532 downloaded from altera.com.First I built an sopc system including DMA Control,On Chip memory(RAM) and PCI Express.My quartus version is 9.1.Then I run the testbentch provided in the project folder.The result is in the attachement.  I don't understand why the value of DMA signal "length" is always"000000",and the simulation result shows"simulation stopped due to inactivity!",Can anyone figure out the reason?

[Altera_Forum]

Do you have a clock source ?

[Altera_Forum]

I think the problem may be MSI interrupt but I'm not sure!

[Altera_Forum]

--- Quote Start ---  hello everybody:  recently I did some simulation in modelsim-altera6.5 according to AN532 downloaded from altera.com.First I built an sopc system including DMA Control,On Chip memory(RAM) and PCI Express.My quartus version is 9.1.Then I run the testbentch provided in the project folder.The result is in the attachement.  I don't understand why the value of DMA signal "length" is always"000000",and the simulation result shows"simulation stopped due to inactivity!",Can anyone figure out the reason?  --- Quote End ---    Can you show the source code? My guess is your clock generator is not running (either a race condition, or was not coded to start with).   Srini www.cvcblr.com/blog