Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Tightly Coupled OnChip DMA

Hi, I've got some very strange 'performance behavior' with a tightly coupled on chip memory used as data storage. In order to speed up my design, I've created a tightly coupled on chip memory w...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Any chance that the code fetches are being deferred by the dma?

Personally I wouldn't take an interrupt at the end of the dma either.

The cost of the ISR is probably more than the transfer.

You just need to poll the 'dma busy' register.

But I've really not looked at what the altera HAL code does. I'm not impressed by the HAL code I've looked at.