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Altera_Forum's avatar
Altera_Forum
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12 years ago

non-blocking AvMM reads

Hi, I have observed that when user application tries to read from a non-existing address the uC hangs, but when doing the same with memory viewer in debug mode, it doesn't. I would assume the d...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

The JTAG debugger uses the same instructions as 'normal' code.

IIRC the avalon cycle usually completes and returns ~0.

I think there is a menu somewhere to enable a interrupt on an Avalon cycle with an illegal address (but it might be on the 'hidden' options menu).

I've seen problems where such accesses from PCIe 'trash' the PCIe link - but only on one of the many BARs out system has.