Forum Discussion

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

With the Cyclone V SoC, how can I use the FPGA fabric to access the HPS DMA?

Hello everyone, I want to make something that records values that are in my FPGA. I thought of using the Cyclone V SoC DMA, I do have the Altera SoC kit. With the Cyclone V SoC, how can I ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

--- Quote Start ---

So, I've increased the data width of the onchip ram to 64 bits and enabled only words/double-words transfers in the DMA.

With this I was able to get 224MB/Sec, a little bit better.

Final update:

The device driver wasn't enabling the double word transfer, with it enabled now I am hitting 324MBytes/Sec.

--- Quote End ---

Hi Aprado,

Would it be possible that you posted your design or possibly email me? I'm trying to do a similar task but I'm having issues with the dma and how it gets controlled by hps.

[email protected]