SOPC硬件系统的搭建
cycloneIII_3c25_niosII_application_selector （应用程序选择器）
硬件系统的搭建
遇到了两个问题：
- Error: el_camino_sd_card_controller.avalon_slave_0: Cannot have both write and writebyteenable (only one is allowed)
SD卡有问题
- Error: ddr_sdram.s1: Appears at more than one address (0x00000000, 0x06000000)