FPGA

设计一个能求出一个32bit字中两个相邻0之间最大间隙的电路。完成HDL设计及testbench描述，给出综合后的时序仿真结果。提交纸质文档。(Design a circuit that can find the maximum gap between two adjacent 0 in a 32bit word. The HDL design and testbench description are completed, and the result of comprehensive simulation is given. Submit paper documents.)

IT8051，增强版的T51，兼容DW8051核的多数端口，IO需要扩展后使用

利用verilog实现对SD卡的控制，可以实现对SD卡的读写。(Verilog SD)

周立功Verilog HDL黄金参考指南，学习VerriLog的东西。-Golden Week Ligong Verilog HDL reference guide, learning VerriLog things.

QFSK的调制与解调，用C写的主程序，汇编写的调制与解调的子程序(QFSK the modulation and demodulation, with the main program in C, compile writing, the modulation and demodulation of the Subprogram)

说明：  QPSK 调制 与 解调的源代码 可综合 出波形(QPSK modulation and demodulation of the source code)

基于VHDL的电子秒表的设计，使用VHDL语言描述一个秒表电路，利用QuantusII软件进行源程序设计，编译，仿真，最后形成下载文件下载至装有FPGA芯片的实验箱，进行硬件测试，要求实现秒表功能。(Design of electronic stopwatch based on VHDL)

SHIFT_8REG是8位的一个具有移位功能的寄存器，每一次数据打入都会从这个寄存器的最低位打入，并相应进行向左移位。 ODD_110BREG是一个3位的备份寄存器，寄存器中存放的是奇数帧的同步头，也就是110。 EVEN_9BHREG是一个8位的备份寄存器，寄存器中存放的是偶数帧的同步头，也就是10011011。这两个寄存器的初始值在系统一开始就打入。 -SHIFT_8REG is eight with a displacement of the functional Register, Each will enter the data from the register into the lowest point, and the left shift accordingly. ODD_110BREG is a three backup Register, the Register is stored in the odd frame synchronization head, is 110. EVEN_9BHREG 8 is a backup Register, which register is kept even the first frame synchronization, is 10011011. This register the two initial value of the system into a start.

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;

说明：  实现了QPSK的调制，使用了ise自带的dds的IP核(QPSK is modulated and the IP core of DDS is used in ise.)