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Altera_Forum's avatar
Altera_Forum
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15 years ago

URGENT: Peripheral to Memory DMA Transaction

Hello, may I know how to transfer data from peripheral to memory using DMA? It is quite confusing from memory-to-memory transfer. please help! thanks!
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

That might be a reason. The NIOS manual is clear in this case:

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If ... the HAL driver is active for the same device, your driver will conflict and fail to operate.

--- Quote End ---

As I already said, check the DMA register contents, whether the HAl driver interferes with your settings. Do it at least before issuing the run bit.