用FPGA实现cordic算法

此代码是由FPGA产生SPWM波的代码，简单易懂(use FPGA to generate SPWM)

DDS波形生成器verilog语言书写（FPGA型号cy4以上）(DDS generate verilog)

FPGA编程，经过团体奋战完成，全是底层的IIc和sci通信，完整版。(FPGA programming, after groups fight to the finish, all underlying SCI and IIc communication, full version)

VHDL语言编程简单实例若干，适合于初学者(VHDL language programming simple example, suitable for beginners)

基于VHDL编写的10进制显示输出，基于16进制的10进制控制，适合初学者(VHDL-based display output written in decimal, hexadecimal, 10 hexadecimal-based control, suitable for beginners)

对pci9054芯片的配置进行了设置，并对PCI9054的各状态机进行了设置，程序经过了测试(Pci9054 chip on the configuration of the set, and each state machine PCI9054 been set, the program have been tested)

VHDL 源码模块，可以实现最经典原PWM，可以用于电源，电机的控制()

实现AHB转SRAM接口实现，支持猝发，零等待延迟(Implementation of AHB to SRAM Interface)

QPSK调制的载波频偏估计，是一个可以调用的函数。接收端进行了一系列的处理。经典的Fitz法(QPSK-carrier frequence offset estimation_ Fitz)

用blockram实现移位寄存器，开发语言为verilog hdl(Shift register with blockram achieve the development language for the verilog hdl)