FPGA SDRAM读写

SDRAM即同步动态随机存储器，同步是指memory工作需要同步时钟，内部命令的发送与数据的传输都以它为基准；动态是指存储阵列需要不断地刷新来保证数据不丢失；随机是指数据不是线性依次存储，而是自由指定地址进行数据读写

sdram_test
_ngo
_xmsgs
audio_test_summary.html
chipscope_icon.ngc
chipscope_icon.v
chipscope_ila.ngc
chipscope_ila.v
ipcore_dir
iseconfig
par_usage_statistics.html
rtl
sdram_2fifo_top_summary.html
sdram_test
sdram_test.bgn
sdram_test.bit
sdram_test.bld
sdram_test.cmd_log
sdram_test.drc
sdram_test.gise
sdram_test.lso
sdram_test.ncd
sdram_test.ngc
sdram_test.ngd
sdram_test.ngr
sdram_test.pad
sdram_test.par
sdram_test.pcf
sdram_test.prj
sdram_test.ptwx
sdram_test.stx
sdram_test.syr
sdram_test.twr
sdram_test.twx
sdram_test.ucf
sdram_test.unroutes
sdram_test.ut
sdram_test.xise
sdram_test.xpi
sdram_test.xst
sdram_test_bitgen.xwbt
sdram_test_envsettings.html
sdram_test_guide.ncd
sdram_test_map.map
sdram_test_map.mrp
sdram_test_map.ncd
sdram_test_map.ngm
sdram_test_map.xrpt
sdram_test_ngdbuild.xrpt
sdram_test_pad.csv
sdram_test_pad.txt
sdram_test_par.xrpt
sdram_test_summary.html
sdram_test_summary.xml
sdram_test_usage.xml
sdram_test_xst.xrpt
usage_statistics_webtalk.html
webtalk.log
webtalk_pn.xml
xlnx_auto_0_xdb
xst
_ngo
netlist.lst