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Altera_Forum
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12 years ago

Modelsim and CycloneV PLL : flat output

Hello everyone, I am trying to simulate a QSys design with Nios and custom IPs, one of them including a reconfigurable pll. I am able to compile my design, simulate it, but when simulating, c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I haven't run into this problem myself. But I think you need to ask yourself if it works fine for you in isolation, but fails when integrated into the larger system: what changed?

From your description, it sounds like you might be using your own Modelsim scripts instead of the Qsys generated ones; your list of libraries doesn't match what I have in my projects which use the msim_setup.tcl from Qsys 13.1 Have you tried using the Qsys testbench scripts just to see it lock (or not)?