用VHDL编写的JK触发器

a、设计可显示横彩条和纵彩条的VGA彩条信号； b、设计可显示英语字母的VGA彩条信号； c、设计可显示移动彩色斑点的VGA彩条信号； d、设计可实现手动切换a、b、c三个功能.(The design can display VGA color color and color of the longitudinal cross signal. The design can display the VGA color signal of the English alphabet. The design can display the VGA color signal of mobile color spots.)

本文件是用CPLD（EPM7064）驱动线阵CCD（ILX509），其中包括原理图和程序-This document is a CPLD (EPM7064) driver line array CCD (ILX509), including schematics and procedures

SAP-1硬件描述语言（使用Verilog语言）

offset_cancellation code for matlab to hdl

本文分析了当前国内外出租车计费系统的基本组成和工作原理及主要的两种设计方式:基于单片机的设计方式和基于FPGA的设计方式；并对这两种实现方式的优点和缺点进行分析，比较后确定本系统的方案：基于FPGA的出租车计费系统的设计。(This paper analyzes the current taxi charging system at home and abroad, working principle and basic components of two major design approach: the design methods based on single chip FPGA-based design approach and the two implementations to analyze the strengths and weaknesses, After comparing the program to determine the system: FPGA-based taxi billing system.)

说明：  此代码是由FPGA产生SPWM波的代码，简单易懂(use FPGA to generate SPWM)

NAND型闪存接口程序 里面包含了datasheet以及测试程序 (NAND flash memory interface program)

用于FPGA的学习，大家值得借鉴，可以好好学习一下(this is for fpga and you can use this.)

这是一段写pwm的硬件程序，通过不同的占空比控制不同led灯的亮度，这样可以很好地体现vhdl的硬件代码的优点，     

显示频率测量，外接24MHz晶振，显示数据为三位，分四个档来测量-show frequency measurement, external 24MHz crystal oscillator, the data show that three, four hours to measure stalls