vhdl code for counterand detemines how counter works

加减可控制的十到十六进制计数器。完全准确，可以放心使用的(Add and subtract controllable ten to hexadecimal counter. Entirely accurate, can be at ease of use)

vhdl经典实例――信号灯控制，入门者必须掌握-vhdl classic example-- to control lights, beginners must master

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

VHDL版的C8051核(C8051).evatronix公司的IP核-VHDL version of the C8051 core (C8051). Evatronix company s IP core

用FPGA实现pwm调制波，通过单片机软核控制输入量来实现任意占空比方波的产生-wave

基于FPGA数字频率计，VHDL，quartus，8位频率显示，精确度高

实现QAM调制功能和QAM解调功能的代码.(Realize QAM modulation function and QAM demodulation function code.)

最完整最实用的8051的软核，用VHDL语言编写全部原代码，并有详细的注释介绍，对开发增强型多功能单片机或RSIC单片机内核和单片机SOC应用非常有参考价值-most complete most practical of the 8051 soft-core, with all the preparation VHDL source code, and the Notes for a detailed briefing on the development of an enhanced multi-purpose microcontroller core or RSIC microcontroller and microprocessor applications SOC very valuable reference

该源码表述了ecc算法如何用vhdl实现RSA（Ron Rivest，Adi Shamir，Len Adleman三位天才的名字）一样，ECC（Elliptic Curves Cryptography，椭圆曲线密码编码学）也属于公开密钥算

简单的apb i2s接口，verilog代码，包括rtl实现和testbench(apb i2s interface . coded by Verilog. including rtl and testbench)