这是一个时钟的VHDL源代码，其中包含了源代码，以及工程。

说明：  基于fpga的spi通信测试 可与stm32进行spi通信测试(SPI communication test based on FPGA can test SPI communication with stm32)

基于fpga的正弦波发生器设计，有一定的参考价值，写的比较详细-The sine wave generator based on FPGA design, have a certain reference value, a more detailed written

数字秒表的VHDL代码。当设计文件加载到目标器件后，设计的数字秒表从00-00-00开始计秒。，直到按下停止按键（按键开关S2）。数码管停止计秒。按下开始按键（按键开关S1），数码管继续进行计秒。按下复位按键（核心板上复位键）秒表从00-00-00重新开始计秒。(The VHDL code for digital stopwatch. When the design document loaded into the target device, the designed digital stopwatch count the seconds from the 00-00-00. Until you press stop key (key switch S2). Nixie tube stop count seconds. Press the start button (key switch S1), the digital control continue to count seconds. Press the reset button (core panel reset button) to restart the stopwatch count seconds from the 00-00-00.)

This code implement a interation in cordic pipelline

提供了利用 GPIF 对 FX2LP 与同步 FIFO CY7C4625-15AC 之间的接口进行设计的源代码(Provides for the use of GPIF FX2LP and synchronization FIFO CY7C4625-15AC to design the interface between the source code)

全自动洗衣机的控制器。 1.洗衣机的工作步骤为洗衣、漂洗和脱水三个过程，工作时间分别为：洗涤10秒，漂洗5秒，脱水5秒； 2.用一个按键实现洗衣程序的手动选择：A、单洗涤；B、单漂洗；C、单脱水；D、漂洗和脱水；E、洗涤、漂洗和脱水全过程； 3.用显示器件显示洗衣机的工作状态（洗衣、漂洗和脱水），并倒计时显示每个状态的工作时间，全部过程结束后，应提示使用者； 4.用一个按键实现暂停洗衣和继续洗衣的控制，暂停后继续洗衣应回到暂停之前保留的状态； (Automatic washing machine controller. 1 washing machine work steps for the laundry, rinsing and dehydration three processes, working hours are as follows: washed for 10 seconds, rinse for 5 seconds, dehydrated five seconds 2 with a button to manually select the program to achieve laundry: A, single-washing B, single rinse C, a single dehydration D, rinsing and dehydration E, washing, rinsing and dehydration the whole process 3 with a display device display the working status of washing machine (laundry, rinsing and dehydration), and each state countdown show working hours, after the whole process should prompt the user 4 laundry with a button to pause and continue control of laundry, laundry should be back after a pause pause before continuing to retain the state )

verilog 写的 “梁祝”乐曲演奏电路-verilog wrote " The Butterfly Lovers" music concert circuit

ＦＰＧＡ与ＳＤＲＡＭ　的　ＶＨＤＬ　接口设计(ｔｈｅ　interface of FPGA and SDRAM)

8086微机原理实验：8251串行接口、8253计数器、数码管、跑马灯。汇编语言。(8086 microcomputer principle experiment: 8251 serial interface, the 8253 counter, digital tube, Marquee. Assembly language.)