How to use SDRAM on de2-70 board?

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first of all.

why not using SOPC?

the reason I guess is to access SDRAM via NiosII is too slow.

you wanna access SDRAM as fast as it can.

is that right?

you can use SOPC builder and Avalon-MM "Master".

you can use bast transfer via Avalon bus.

this is easy way and safety way.

otherwise, you need to write long long code in HDL.

like this.

ttp://cache.micron.com/protected/expiretime=1282712493;badurl=ahr0cdovl3d3dy5tawnyb24uy29tly80mdquahrtba==/fe03e95c6f6a764e10b3fbfff5a207f7/1/32/512mb_sdr.pdf

reading and writing process is not difficult.

but you need to write initial process and precharge process as well.

I have done this before( for SDRAM / DDRSDRAM)

it took months.( I was newbie too)

now, I was studied I did not need to write this.

SOPC is handy enough.

if you still wanna try it, the hell is waiting for you.

good luck.

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Thanks for your apply.

after of all, I need to use SOPC buillder..

"you can use SOPC builder and Avalon-MM "Master".

you can use bast transfer via Avalon bus."

I don't understand above sentence...

1. what kinds of sopc component do i use?

NIOS II/e cpu, sdram controller, jtag uart, and avalon MM??

I don't know about avalon ...

2. after using above sopc builder component, do i have to use eclipse software for using sdram? or use verilog code to write/read sdram.

3. if i must use software for sdram data inout,

I want to write some data to address of sdram, and read data from

address of sdram using Nios II Eclipse (c or c++).

(ex. address : 0x0002000, data : 11111111

0x0002001, data : 11111110 ...)

how can i write/read data to/from address using c or c++.

I try to find some SDRAM examples, there are not about real/write data, but about only LED, Switch..

How can I get some instruction or code about using SDRAM data/address?

Thanks for your kindness.