ep2c5核心电路SCH

里面含有vhdl和verilog 版本,很好用!dct变换用得很多啊!(Which contains a VHDL and Verilog versions of very good use! Dct transform with a lot ah!)

使用verliog设计实现LUT查找表乘法器，通过modelsim仿真验证通过(Designed and implemented using the LUT lookup table verliog multipliers, through simulation by modelsim)

开关电源变换器（Switching Power Supply）为当前电子产品中应用非常广泛的功率器件，在日常生活中无处不在

说明：  对MAX5250芯片进行控制，实现DA转换输出。(Controlling MAX5250 Chip)

EDA 正弦信号发生器：正弦信号发生器的结构有四部分组成，如图1所示。20MHZ经锁相环PLL20输出一路倍频的32MHZ片内时钟,16位计数器或分频器CNT6，6位计数器或地址发生器CN6，正弦波数据存储器data_rom。另外还需D/A0832（图中未画出）将数字信号转化为模拟信号。此设计中利用锁相环PLL20输入频率为20MHZ的时钟，输出一路分频的频率为32MHZ的片内时钟，与直接来自外部的时钟相比，这种片内时钟可以减少时钟延时和时钟变形，以减少片外干扰 还可以改善时钟的建立时间和保持时间，是系统稳定工作的保证。CNT6用来将32MHZ进行8分频得到4096HZ的频率提供给CN6与data_rom时钟信号。由CLK端输入20MHZ的时钟信号，在DOUT端就可输出稳定的正弦信号。(Sine signal generator has the structure of four parts, as shown in figure 1 below. The 20 MHZ phase lock loop PLL20 output all the way of frequency doubled within 32 MHZ slice clock, 16 counter or prescaler CNT6, six counter or address generator CN6, sine data storage data_rom. In addition to D/A0832 (shown in not draw) will digital signal into analog signals. This design using the phase lock loop PLL20 input frequency for 20 MHZ clock, the output of the frequency of all points frequency of 32 pieces (MHZ clock, and comes directly from the external clock, compared to this piece of clock can reduce the clock in delay and clock deformation, to reduce the interference of Can also improve the establishment of the clock time and keep time, is the system stability of assurance. CNT6 used to will and to 8 MHZ get 4096 HZ dividing the frequency to provide CN6 and data_rom clock signal. The input by CLK 20 MHZ clock signal, in DOUT end can output stable sine signals. )

基于FPGA的DDS信号源设计，32位相位累加器，产生可调频率(FPGA-based DDS signal source design, 32-bit phase accumulator to generate tunable frequency)

针对传统CPM正交扩频系统实现复杂度高的问题，提出了一种基于预编码的CPM正交扩频系统。(Pre—encoded CPM orthogonal spread spectrum system)

Verilog HDL实现的I2C Slave模拟-achieve the Verilog HDL simulation I2C Slave

十一和通过vivado实现多周期cpu，各种作业再里面包含了(Realizing multi period CPU)

UART RS232 IPCORE for sopc builder -RS232 UART IPCORE for sopc builder