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I plan to use flash memory but I dont know the setting in SOPC, not sure of the verilog code for the signal connection and i dont know how to access the flash memory? is it possible that you help me out with some basic info? thanks!
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I can anwer you on specific issues but I can't write here all the information you require, since it seems you are starting from scratch.
You'd better take a reference design using flash memory and learn from it, as anyone else here has probably done. On Altera website you'll find plenty of documentation and samples.
You can also search the forum for useful hints.
Regards