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andrydood,
Unfortunately, I ran out of time before I was able to figure out a solution. However, before I stopped working on the project I believe was playing around with the VIP demo which can be found here:
http://rocketboards.org/foswiki/view/projects/sockitvideoipvipreferencedesign It is using a DMA from HPS to FPGA, so it is not what you are looking for; however, if I recall correctly, I had read a couple posts on here (or maybe from some tech notes from Altera) that ultimately steered me away from the FPGA-to-HPS SDRAM bridge. I don't recall exactly what it was, I apologize.
Sorry I couldn't have been more help. Taz1984 might be able to provide more support?
R/
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There are several posts on the board about this, so I recommend searching around the forum. Several people have had it work by using either the F2S of F2H bridges, but it does require memory management to make sure nothing will be overwritten. If writing to the SDRAM, it is necessary to reserve space in the RAM (check out Uboot options) or by doing it with a kernel-mode driver. There are also sveral design examples now:
The best one:
https://support.criticallink.com/redmine/projects/mityarm-5cs/wiki/writing_to_hps_memory https://cloud.altera.com/devstore/platform/14.0.0/datamover-design-example/
Honored Contributor
