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Altera_Forum's avatar
Altera_Forum
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16 years ago

simulation stopped due to inactivity!

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?

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    --- 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