ALTERA　NIOS处理器实验，编程环境是QUARTUS，在NIOS SHELL下编译实现功能。实验USB接口-Altera NIOS processor experiments, programming environment is QUARTUS in NIOS SHELL compiler functionality. Experimental USB interface

sdram数据路径模块编程，经综合后壳生成rtl级电路图-SDRAM data path module shell programming, after comprehensive RTL-level circuit diagram is generated