关于DDR SDRAM的详细原理和时序分析,对于开发设计有很大使用价值-DDR SDRAM on detailed principles and timing analysis, design for the development of a great value

使用 Virtex-4 FPGA 器件实现DDR SDRAM控制器以及DDR2 SDRAM操作时序-Using the Virtex-4 FPGA devices to achieve DDR SDRAM and DDR2 SDRAM controller operation timing

一个关于音频播放的fpga驱动代码。流程是从sd卡中读取音频文件，然后缓存到DDR中，再通过一定的时序关系让音频WM8731芯片播放-An audio playback on fpga driver code. The process is to read audio files from sd card and then cached to DDR, and then through a certain timing relationships allow playback of audio