vhdl代码

说明：  基于FPGA，用verilog hdl语言实现串口收发实验(Based on FPGA, using Verilog HDL language to achieve serial port transceiver experiment)

VESA CVT视频参数计算器，输入分辨率和刷新率即可得到需要参数。(VGA Timing Calculator)

遥控器编码电路的设计，包含有遥控器编码电路设计的VHDL源文件，源代码。通过这一段程序设计，实现在FPGA开发板上进行无线遥控操作，这一实现具有很高的现实意义，很强的应用价值。

说明：  设计一简易数字频率计，其基本要求是： 1)测量频率范围0～999999Hz； 2)最大读数999999HZ,闸门信号的采样时间为1s；. 3)被测信号可以是正弦波、三角波和方波； 4)显示方式为6位十进制数显示； 5）具有超过量程报警功能。 5)输入信号最大幅值可扩展。 6）测量误差小于+-0.1%。 7)完成全部设计后，可使用EWB进行仿真，检测试验设计电路的正确性。(The basic requirements of designing a simple digital frequency meter are: 1) The measuring frequency range is 0-999999 Hz. 2) The maximum reading is 999999HZ, and the sampling time of gate signal is 1 s. 3) The measured signal can be sine wave, triangle wave and square wave. 4) The display mode is 6-bit decimal number display. 5) It has alarm function beyond range. 5) The maximum amplitude of input signal can be expanded. 6) The measurement error is less than +0.1%. 7) After completing all the design, EWB can be used to simulate and test the correctness of the circuit.)

说明：  Ovo sto saljem je tutorijal 7 sa vhdlom

可以产生8比特的采样波形，非常不错的VHDL程序(Sampling can produce 8-bit waveform, very good VHDL program)

Control with DAC conversion

一款在Verilog实现的吃豆人游戏，采用VGA接口，在Nexys3开发板上运行无误。(A pac-man game implemented via Verilog, using VGA interface, perfectly run on Nexys 3)

这个并串转换代码是依靠同步状态机来实现其控制的。其实并串转换在实际的电路中使用还是比较多的，尤其在通信线路方面的复用和分解方面，原理上就是一个串并转换和并串转换的过程。举个简单的例子，计算机串口发送数据的过程，如果满足发送条件了，其实就是一个并串转换的过程了。好了，废话不说，看代码就是。 -And the string conversion of the code is relying on the synchronization state machine to achieve its control. In fact, string conversion circuit in the actual use of, or more, particularly in the area of communication lines and the decomposition of reuse, the principle is a string and the conversion and the conversion process and string. Here is a simple example, the computer serial port of the process of sending data, if sent to meet the conditions, but in fact is a process of conversion and a string. Well, do not talk nonsense, look at the code is.

采用xilinx的ROMIP核产生类似正弦信号，经过FFt后可以观察结果(Using the xilinx ROMIP nuclear generating similar sinusoidal signal can be observed through the results after FFt)