这是一个基于VHDL语言编程的电子琴源代码程序，希望可以帮到大家...

Verilog HDL编写的键盘扫描程序，考虑了判断按键弹起的问题。程序按一定的频率用低电平循环扫描行线，同时检测列线的状态，一旦判断有一列为低则表示有键被按下，停止扫描并保持当前行线的状态，再读取列线的状态从而得到当前按键的键码；等待按键弹起：检测到各列线都变成高点平后，重新开始扫描过程，等待下一次按键。-Written in Verilog HDL keyboard scanner, taking into account to determine key bounce problem. Program according to a certain frequency of scan lines with low-level circulation lines, while testing out the state line, once the judge has said there is a classified as low-key is pressed, stop the scan and to maintain the current line-line state, and then read out line state to get the current keys key codes to wait for key pop-up: To detect the lines at all out into a high level after the re-start the scanning process, waiting for the next key.

由于在网上很难下载到EDA技术－窦衡的PPT，所以本人经过学习后做成word，供大家下载。只针对VHDL语言部分和所有的程序。-Because the Internet is difficult to download to EDA technology- Douheng of the PPT, so I made after learning after the word, for all to download. Only for part of the VHDL language and all the procedures.

用VHDL编写的huffman编码的源程序(With the VHDL source code written in huffman coding)

基于FPGA的电子密码锁设计-已在开发板上成功运行，通过老师检验。(FPGA based electronic password lock design- has been successfully developed on the development board, through the teacher inspection.)

ODBC编程实例，使用ODBC对基于开关量数据采集卡的通信接口设计与实现。(ODBC programming examples, using ODBC for data acquisition card based digital communications interface design and implementation.)

VHDL参考手册，从事FPGA的好帮手，FPGA学院的终身伴侣！-VHDL Reference Manual, in FPGA a good helper, FPGA college life companion!

基于fpga和sopc的用VHDL语言编写的EDA的32位Nios CPU嵌入式系统及其DMA设计俄罗斯方块游戏机(FPGA and SOPC based on the use of VHDL language EDA 32-bit Nios CPU and the DMA design of embedded systems Tetris game)

《FPGA数字信号处理与工程应用实践附光盘》配套源代码(FPGA DSP and their applications with verilog HDL)

说明：  OFDM载波同步，Verilog编写，完全正确！！！(verilog )

VHDL硬件描述语言与数字逻辑电路设计,学习VHDL的好资料-VHDL hardware description language and digital logic circuit design, VHDL learning good information