用verilong hdl语言编写的数据采样程序，A/D采用的是TLC5260

COUNTER 用于xilinx硬件，里面已建工程，修改ucf即可。设计由3部分组成，计数器，100M分配时钟，顶层模块，其中顶层模块包括计数器和分频器。

同步串行数据发送电路SSDT的基本功能是将并行数据转换成串行数据并进行同步发送。系统写入和读出时序完全兼容Intel8086时序。 系统以同步信号开始连续发送四个字节，在发送中出现5个1时插入一个0，在四个数据发送结束而下一次同步没有开始之前，发送7FH，这时中间不需要插入零 -synchronous serial data transmission circuit SSDT the basic function is to convert parallel data into serial and the same this step. System write and read sequential fully compatible Intel8086 timing. Synchronized signal system to start sending four consecutive bytes, in this emerging 5 1:00 insert a 0, at the end of four data sent and the next synchronization not started before, sending seven FH, then the middle is not inserted

VGA图象显示控制器设计,实现在VGA显示器上显示图象.-VGA image display controller designed to achieve the VGA display shows images.

实现拟想要的音乐，基于at89s51单片机的电子琴设计！(To achieve the desired music to be based at89s51 keyboard microcontroller design!)

FPGA读取LM75A温度数据，并在段码LED上实时显示。(The temperature data of LM75A are read by FPGA and displayed on segment code LED in real time)

利 用 来 vhdl 设 计 p cm的 实 现-Vhdl design used for the realization of p cm

AD768产生锯齿波的源码，DA转化的最基本操作。(AD768 sawtooth source code, the basic operation of DA conversion.)

8051MCU在FPGA上实现的源代码，用VHDL语言编写-8051MCU in the FPGA to achieve the source code, using VHDL language

基于FPGA的fsk调制程序，包括载波的生成，nco的设置(FPGA-based fsk modulation procedures, including carrier generation, nco settings)

时间同步后即可确定每帧数据的起始位置，这样就能完整的截取下每一帧。但是，数据中还带有频偏信息。在常规的通信系统中，多普勒很小仅仅会带来很小的频偏，但是在大多普勒的情况下，频偏将非常大，20马赫的速度将会带来将近34K的频偏。因此，如何很好的纠正频偏即为本系统的难点。 OFDM中，我们将大于子载波间隔倍数的频偏称为整数倍频偏，而将小于一个子载波间隔的频偏称为小数倍频偏。频偏矫正精度只要能保证小于十分之一倍的子载波间隔，频偏就不会对均衡和解调造成影响。本文中我们借鉴这种思想，由于硬件资源限制，我们将在接收端做64点FFT，即相当于将频域划分为64份，我们将小于 的频偏称为小数倍频偏，将 整数倍的频偏称为整数倍频偏。本程序即基于SCHIMDL经典方法完成小数倍频偏纠正(After time synchronization can determine the starting position of each frame data, so you can complete the interception of each frame. However, in the data with frequency information. In conventional communication systems, doppler small will bring only small deviation, but in the case of most of the doppler, frequency PianJiang is very large, 20 Mach speed will lead to deviation of nearly 34 k. Therefore, how to good to correct deviation is the difficulty of this system. OFDM, we will be bigger than the sub-carrier spacing ratio of frequency deviation is called the integer frequency offset, and the interval will be less than a child carrier frequency offset is called decimal frequency doubling. Deviation is less than one over ten times as long as can guarantee accuracy of sub-carrier spacing, deviation will not affect balance and demodulation. This article, we draw lessons from the idea, due to the limited hardware resources, we will do 64 points FFT at the receiving end, which is equ)