Tranfer date with USB OTG and store to DDR3 memory

Question

Hi all, I am new with the microzed and I have just began using FPGAs. I have gone through some getting started and hello world tutorials.

I would like to send some data from my PC (around 500 MB) to the RAM memory in the Microzed. I was planning on using the USB OTG to do the data transfer and then store the data in the DDR3 memory. At the moment I know how to create a QSPI Flash image in order to boot open source Linux.

Is there any example of how to use the USB OTG? And any example of how to store data in DDR3?

If not, could you give me some advice about how to continue?

Thanks

michaelkellett · Answer

Hello Juan,

Tell us more, why do you want to do this - is it an exercise or part of a project. Are you looking for the least hassle solution or to test out some ideas.

On a microZed you can do this using the processor or the FPGA - which do you want to use and why ?

It will be much easier using the processor and linux.

People on E14 have been doing some Xilinx tutorials and blogging about them under the banner "Path to Programmable"

Take a look at their blogs and this will give you an idea of where to look.

There is a lot of material on Xilinx's website.

MK

shabaz · Answer

Hi Juan,

I can't help much but as Michael mentions, the Path to Programmable blogs may get you going in the right direction, especially how to write data to the DDR via the usual memory map, if you're bare metal, and how to access it via the FPGA portion.

You've mentioned you're running Linux.. in that case, if you're using the processor to access then is likely you'll need to find or write a driver to write to specific memory. The reason is that Linux takes control of the RAM usually, so it's not under your control. Linux will allocate RAM as required, and never tell you the memory location addresses (since it uses memory management that hides this). It should be possible to configure Linux so it only uses a portion of RAM, leaving the remainder for use by a driver, or for Linux to allocate in advance during startup and then provide the physical address, but this is not specific to Xilinx or Microzed, so linux forums may be able to help too.

clem57 · Answer

saffaa have you looked at Avnet Boards Training ?

Tranfer date with USB OTG and store to DDR3 memory

Top Replies