SDRAM for Image Processing

Make sure double check your pin assigments and your clk pin to sdram too. The simple is using SGDMA.

Sean

hi...

i double checked pin assigment,it seems to be correctly assigned.Since i making neighborhood inspection, using differents offset to read the sdram, my problem could be related to one of thee issues? the thing is that i dont understand the proposed solution :confused:

problemWhy does the Scatter-Gather DMA (SG-DMA) Controller Core stall indefinitely if burst transfers are enabled?

solution

The SGDMA will stall indefinitely if it encounters transfer lengths which are not multiples of the burst length. This will only occur if burst transfers are enabled.

For example if you configure the SGDMA for 32 bit transfers with a maximum burst length of 2 then you must use transfer lengths that are multiples of eight bytes to avoid this issue.

To avoid this issue please upgrade to the Quartus II design software version 8.1 and regenerate your system in SOPC Builder.

problem Why do I get corrupt data read results with the Scatter-Gather DMA Controller Core (SG-DMA)?

solution

If you enable unaligned accesses, read data can become corrupt. To avoid this you should disable unaligned accesses and only provide word aligned read addresses to the SGDMA.

thank you

Hi silvana,could you explain how to use ddr sdram controller .And i have a altera university program license .In megewizard i have a ddr sdram controller.Is this enough to store datas into the sdram or other wise is IP needed?

And also i didnot have hardware .can i verify my programs of sdram controller through simulator

please help me

thank you

Parva,

I think you can run modelsim. But you must have a physical hardware to be able to run it sdram.

Sean

Hai silvana,thank you.

could you guide me how to write program for ddr_sdram controller

and how to instantiate ddr_sdram in top module?

thank you