SPI MCU

基于FPGA的频率测量，能测量方波信号的频率、占空比、相位差。范围100mHz~200MHz，精度0.0001Hz(The frequency measurement based on FPGA can measure the frequency, duty cycle and phase difference of the square wave signal. Range 100mHz~200MHz, precision 0.0001Hz)

在FPGA上编写的通过SPI总线配置外部DAC芯片DAC5686的程序，通过板级调试，验证可用。程序通过状态机实现，将需要配置的寄存器值转为SPI总线的数据格式发送出去。 (Configure external DAC chip DAC5686 via SPI bus program on FPGA written by board-level debugging, verification is available. Program through the state machine, you will need to configure the register values 椠渀琀漀 SPI bus data format sent.)

vivado入门使用介绍，初学者入门学习(vivado Instructional pdf)

《CPLDFPGA嵌入式应用开发技术白金手册》源代码，涉及FPGA/CPLD的各个方面，键盘扫描，LED扫描等简单程序及滤波器等的设计(" CPLDFPGA platinum embedded application development technology handbook" source code, related to FPGA/CPLD all aspects of the keyboard scanning, LED scanning filters, such as simple procedures and design)

基于DE2开发板的VGA显示模块，仅供大家参考(DE2 development board based on the VGA display module, for your reference)

本应用指南描述了在 Virtex™-4 XC4VLX25 FF668 -10C 器件中实现的 DDR SDRAM 控制器。该实现运用了直接时钟控制技术来实现数据采集，并采用自动校准电路来调整数据线上的延迟。DDR SDRAM 器件是低成本、高密度的存储资源，在很多存储器供应商处均可获得。本设计使用 SDRAM 器件和 DIMM 开发而成。

非常好的EPM570(CPLD)学习程序源码,适合初学者,能让其快速入门(Very good EPM570 (CPLD) learning program source code, suitable for beginners, allowing its Quick Start)

VHDL operators basics

利用实现verilog语言实现，pwm波的实现通过观察led灯的来实现，文件内附testbench文件

adder_array的设计。加法器阵列设计，顶层模块，四步流水，21位(adder_array the design. The adder array design, top-level module, four-step pipeline, 21)