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Altera_Forum's avatar
Altera_Forum
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15 years ago

DMA-controller doesn't generate an interrupt after changing the transaction type once

Hello, I realized that the dma-controller doesn't generate an interrupt the first time after I change the transaction type without resetting the core. But the transaction is done normally. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

We made similar experiences, but with some differences.

In our case everything went well until we manually aborted the DMA-Transfer. It wasn't enough to clear the GO-Bit and reinit the DMA for a new transfer.

To change the transaction type we had to do a core reset.

but if the DMA-Transfer was successful, we didn't have to do a reset in order to change the transaction type.

If I got you right, you always have to do a reset, don't you? Even after successfully completed DMA-Transfers?

regards,

Philipp