8051核的vhdl原代码。

说明：  基于fpga的spi通信测试 可与stm32进行spi通信测试(SPI communication test based on FPGA can test SPI communication with stm32)

小波变换的VHDL代码，内带正变换逆变换的测试文件。(Wavelet transform VHDL code, with a positive transformation within the inverse transform of the test file.)

I2C控制核设计,由VHDL语言编写,使普通I/O端口实现I2C性能-I2C control of nuclear design, VHDL language, I/O ports I2C Performance

QPSK调制下的（5,7）卷积码的编码和维特比译码与BPSK调制下（5,7）卷积码的编码和维特比译码的BER特性(QPSK modulation under (5,7) convolutional code encoding and Viterbi decoding and BPSK modulation (5,7) convolutional code encoding and Viterbi BER characteristic)

用VHDL语言将二进制数据转换成十进制数据，并将十进制的每一个位分离出来单独存放。使用状态机实现，程序简单，仿真效果很理想，占用可编程器件的资源较少。-VHDL language with the binary data into decimal data and decimal places separated from each store individually. Realize the use of state machine, the program is simple, simulation results are satisfactory, occupation of programmable devices have fewer resources.

This is a bridge IP core to interface the Tensilica PIF bus protocol with the OpenCores WishBone. It currently supports single-cycle as well as burst transfer operations. The core has been tested in a master-PIF slave-WB configuration.-This is is a bridge IP core to interface the Tensilica PIF bus protocol with the OpenCores WishBone. It currently supports single-cycle as well as burst transfer operations. The core has been tested in a master-PIF slave-WB configuration.

基于VHDL语言的3级序列的产生，可以循环产生周期为7的m序列 -Based on the VHDL language for selecting the three sequences, you can have a cycle for cycle 7 m sequence

频率计，ＶＥＲＩＬＯＧ代码，含详细　中文注释．-Cymometer, VERILOG code, containing a detailed Chinese Notes.

nios学习资料，fpga调用外部sdram实例，值得初学者下载。(nios learning materials, fpga call external sdram instance, it is worth beginners to download.)

32位元浮点数加法器,用于以VHDL编写的32位元CPU-32 bits floating-point Add