Path to Programmable Blog 4 - Adding a PL Peripheral & using PS DMA

RE: Path to Programmable Blog 4 - Adding a PL Peripheral & using PS DMA

kriswil — Fri, 24 Apr 2020 19:05:35 GMT

Does anyone know a tutorial on how to use PL DMA for streaming data from PL IO straight to DDR using PL DMA (which is much faster than PS DMA) ? I've been trying to find for a while. There are some examples, like the one for Zybo but it has custom lock IP Cores which I can't access.They're using AXI Video In / Video Out for HDMI video signal. I'm looking to stream raw video data directly from a video CMOS chip, not HDMI format.

So it would look like this:

input : PL IOs -> (something - either IP Core or Verilog code) -> PL DMA -> AXI -> PS -> DDR3

I can't figure out how to send data from custom PL Block (IP Core or Verilog) to PL DMA.

Then I need to stream it out from DDR3 to Ethernet:

DDR3 -> PS -> Ethernet+DMA : output

Anyone seen any tutorial like that?

Thank you!

RE: Path to Programmable Blog 4 - Adding a PL Peripheral & using PS DMA

kriswil — Fri, 24 Apr 2020 16:09:34 GMT

Hello. I love the blog. It's very useful! One question: where can I find those videos? Like for example: HW Chapter 7 video: Zynq PS DMA Controller.

There is no screen shots of how to configure DMA. I assume that's in the video?

RE: Path to Programmable Blog 4 - Adding a PL Peripheral & using PS DMA

davmaz — Wed, 22 May 2019 14:33:29 GMT

Very nice tutorial! Thank you.

However I am continually frustrated trying to get a DMA driver running (ZCU111 -> Ubuntu 16.04). Xilinx code seems to be broken.

Do you have, or could you point me to, code that 'really' works?

RE: Path to Programmable Blog 4 - Adding a PL Peripheral & using PS DMA

rscasny — Sun, 02 Dec 2018 17:30:45 GMT

Great job at explaining what could be a complex topic especially for a beginner.

Randall

RE: Path to Programmable Blog 4 - Adding a PL Peripheral & using PS DMA

DAB — Sat, 01 Dec 2018 19:29:30 GMT

Nice update.

Yes, DMA can be complicated, but it saves a lot of I/O time in the long run.

DAB