基于FPGA的键盘程序代码，可用单片机控制

AD9268的配置Verilog实现，程序用于实现4通道的AD9268的配置(The 4 channel AD9268 configuration)

串口通讯，与硬件联通调试过，收发程序是分开的。(Serial Communication)

DDR（双速率）SDRAM控制器参考设计，xilinx提供-DDR (double data rate) SDRAM controller reference design for Xilinx

说明：  运用VHDL描述函数发生器的各个波形，可有构成多功能函数发生器。(VHDL description of the use of various function generator waveforms, can constitute a multi-purpose function generator.)

数字式移相信号发生器可以产生预置频率的正弦信号，也可产生预置相位差的两路同频正弦信号，并能显示预置频率或相位差值；-digital phase shifting generator can produce preset frequency sinusoidal signal, Preferences may also have phase difference with the way the two-frequency sinusoidal signal, and can show that the preset frequency or phase difference value;

9针的rs232与fpga之间的串口通信源程序(Rs232 9 pin serial communication with the source between fpga)

用verilog hdl语言编写的fpga与片外sram 的读写控制(With the verilog hdl language fpga sram chip with read and write control)

利用VHDL语言编写的4*4键盘扫描程序，经过测试，可以放心使用。(Using VHDL language 4* 4 keyboard scanning procedures, tested, safe to use.)

usb控制器，有VHDL实现的，还有C++的源码，可以编译-usb controller, there is the realization of VHDL, as well as C++ source code can be compiled

说明：  In the data management system a significant role of the Data link layer is to convert the unreliable physical link between reader and tag into a reliable link. Therefore, the RFID system employs the Cyclic Redundancy Check (CRC) as an error detection scheme. In addition for reader to communicate with the multiple tags, an anti-collision technique is required. The technique is to coordinate the communication between the reader and the tags. The common deterministic anti-collision techniques are based on the Tree algorithm such as the Binary Tree and the Query Tree algorithms.