VHDL版的C51核(MC8051)

说明：  LDPC码的FPGA实现，用verilog语言编写(FPGA implementation of LDPC code, written in Verilog language)

USB+FPGA电路设计原理图，实际的电路板运行正常，很有参考意义。-usb_sch

基于FPGA的交通灯代码，VHDL语言书写。适合新手学习vhdl语言时使用(FPGA-based traffic light code, VHDL language writing. Suitable for novice learning vhdl language used when)

用walsh算法实现的符号数乘法器,asic流片时,可以不用公司的付费乘法器的ip core.(algorithm using the symbols multiplier, HDL-piece quantities. it is not necessary for the company's paid Multiplier ip core.)

STT-MRAM磁性存储器全部verilog代码和仿真验证代码，包括行为模块，读写模块和控制模块，已经经过验证完全正确(STT-MRAM magnetic memory all the code and simulation code, including behavior module, reader module and the control module, has been proven entirely correct)

本程序描述了七分频数字电路，程序经过仿真，可以使用。该程序的设计方法为常用的奇数分频设计方法，简单易懂，具体方法描述网上很多，此外设计其他类似的奇数分频电路时，可以直接改动程序中相应的参数即可。文件中工程已经建好，可以用quartus II直接打开

说明：  vhdl常见小实验代码，包括二进制比较器，4选1,8421十进制，8421转化成格雷码，8421余三码，分频器，数据码译码器，二进制减计数器，四位环形计数器等(VHDL common small experiment code)

说明：  本文研究的IIC总线控制器具有如下特征 1.兼容飞利浦I2C标准，以主机模式与外围设备进行数据通信，对IIC从机模型进行读/读，读/写，写/写，写/读[18]。 2.多主操作 3.软件可编程时钟频率 4.时钟拉伸和等待状态生成 5.软件可编程确认位 6.时钟同步设计 7.仲裁中断丢失，自动转移取消 8.开始/停止/重复启动检测/确认生成 9.总线忙检测(The IIC bus controller studied in this paper has the following characteristics. 1. Compatible with Philips I2C standard, data communication between host mode and peripheral devices, read/read, read/write, write/write, write/read for IIC slave model [18]. 2. Multiple Main Operations 3. Software programmable clock frequency 4. Clock stretching and waiting state generation 5. Software Programmable Confirmation Bit 6. Clock Synchronization Design 7. Loss of arbitration interruption and cancellation of automatic transfer 8. Start/Stop/Repeat Start Detection/Verification Generation 9. Bus busy detection)

verilog仿真硬件的工具qiartus2的使用教程,内容简单易懂,初学必备(Verilog simulation tool for hardware qiartus2 the use of tutorials, easy-to-read content, learning essential)

基于ARM的DDS信号发生器设计，可以产生各种信号的波形，生成所需要的信号，可供实验用(DDS signal generator based on ARM, can produce a variety of signal waveform can be used for experiment)