用FPGA做USB2.0通信的实验，完成SLAVE FIFO模式下的数据传输，里面包括固件程序，还有上位机（Ｃ＋＋）程序。-USB2.0 communication with the FPGA to do the experiment, complete the SLAVE FIFO mode data transmission, which includes firmware, and PC (C++) program.