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Altera_Forum
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9 years ago

mSG-DMA IRQ could not be cleared

Hi, I encountered the case that the IRQ bit in mSG-DMA status could not be cleared. I supplied descriptors for the MM-ST direction. The transfer size is small as 256Bytes. Every descriptor gener...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

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Fascinating. Have you tried a SignalTap on the valid and interrupt lines?

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derim, thank you for your interest.

No, I have not yet.

I wished an Altera engineer replied to my post but not yet.

The Altera description for IRQ is just "Set when an interrupt condition occurs" in UG-01085. They must have more detailed design information.