FPGA Intellectual Property
PCI Express*, Networking and Connectivity, Memory Interfaces, DSP IP, and Video IP
Announcements
Intel Support hours are Monday-Fridays, 8am-5pm PST, except Holidays. Thanks to our community members who provide support during our down time or before we get to your questions. We appreciate you!

Need Forum Guidance? Click here
Search our FPGA Knowledge Articles here.
5988 Discussions

Scatter-Gather DMA Controller Core

Altera_Forum
Honored Contributor II
932 Views

Hi, 

 

I am looking to transfer video stream data to memory and SGDMA seems to be supporting this function. The maximum data width that SGDMA core supports is 64-bits. But my data path is 192-bit wide. Are there any cores in Altera library, that can support my data width. 

 

Thanks
0 Kudos
1 Reply
Altera_Forum
Honored Contributor II
150 Views

If you switch to the Modular Scatter-Gather DMA core (mSGDMA) the max data width is 1024 bits. But 192 is not a power of 2 so you'll need a gasket of some kind anyway. Qsys could probably do the width conversion for you, but then you're forced to use Qsys (not my favorite tool). The Avalon protocol is really very easy to work with. I would recommend that you write your own width converter in your HDL of choice. 

 

Hope this helps.
Reply