基于FPGA 的usb传输

利用FPGA实现USB芯片CY7C68013与上位机的进行通信的系统，代码采用VHDL语言实现，利用状态机实现FPGA控制USB的数据传输，传输时序采用SLAVE FIFO实现

fpga_master
simulation
incremental_db
greybox_tmp
db
.sopc_builder
filters.xml
fpga_master.asm.rpt
fpga_master.bdf
fpga_master.bsf
fpga_master.done
fpga_master.dpf
fpga_master.eda.rpt
fpga_master.fit.rpt
fpga_master.fit.smsg
fpga_master.fit.summary
fpga_master.flow.rpt
fpga_master.jdi
fpga_master.map.rpt
fpga_master.map.summary
fpga_master.pin
fpga_master.pof
fpga_master.qpf
fpga_master.qsf
fpga_master.sof
fpga_master.sta.rpt
fpga_master.sta.summary
fpga_master.vhd
fpga_master.vhd.bak
fpga_master_sync.bdf
lai1.lai
pll_clk.bsf
pll_clk.cmp
pll_clk.ppf
pll_clk.qip
pll_clk.vhd
sopc_builder_log.txt
.sopc_builder