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the simulation result of PCIE DMA simple example

Altera_Forum
Honored Contributor II
749 Views

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 is also run out of control,Can anyone figure out the reason?
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Altera_Forum
Honored Contributor II
90 Views

no one can help me ?

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