Totally confused by the DDR2 high performance controller II

The user guide from Altera is bad !

Who can teach me how to use the following inputs?

local_address

local_be

local_burstbegin

local_read_req

local_write_req

local_size

local_wdata

Who can show me a simple example that just write some data into the DDR2 and then read?

The so-called user guide has just a lot of definitions, but no detailed examples!!!

Thanks in advance!!!