FPGA代码，Designing_with_Quartus_II_Exercises_Ver11_v4_2.doc

使用verilog语言完成了基于cordic算法求反正切的计算，精度为8次迭代(Verilog language used to complete based on CORDIC algorithm for arctangent calculation, an accuracy of 8 iterations)

该程序描述了运用FPGA 实现DDA圆弧插补运算(FPGA DDA)

四选一选择器,输入四个,输出1个.当NM=00时选A 当NM=01时选B 当NM=10时选C 当NM=11时选D-four elected a selector, the importation of four, Output 1. When NM = 00 A at the election when NM = 01 am when the election NM B = C 10:00 when the election NM = 11:00 election D

是基于FPGA的5620的数模转换芯片底层的应用程序，希望有用。(Is a digital-analog converter chip underlying the 5620 FPGA-based applications, and I hope useful.)

说明：  fpga的RS485代码,非常容易，适合学习(the code of rs485 in fpga, very easy,suitable for learning)

试设计一种彩灯控制器控制8盏灯。该彩灯控制器有4种自动切换的花样。第一种花样为彩灯从右到左，然后从左到右逐次点亮，全灭全亮；第二种花样为彩灯两边同时亮一个逐次向中间移动再散开；第三种花样为彩灯两边同时亮两个逐次向中间移动再散开；第四种花样为彩灯两边同时亮三个，然后四亮四灭，四灭四亮，最后一灭一亮。四个花样自动变换，重复以上过程。输入时钟频率为500Hz，灯亮的时间在1―4秒之间，可以自由控制。电路中以“1”代表灯亮，以“0”代表灯灭。-Lantern try to design a controller to control 8 lights. The controller has four kinds of lanterns automatically switch the pattern. The first lantern pattern for right-to-left, and then lit from left to right each time, the whole body light second pattern for a lantern light at the same time on both sides of successive spread to the middle of moving again third pattern for lantern light at the same time on both sides to the middle of two successive re-dispersed mobile fourth pattern for the lantern light at the same time on both sides of the three, then four out four bright, four out four-liang, the last light out. Automatically transform the four patterns, repeat the process above. Input clock frequency of 500Hz, the time for lights between 1-4 seconds, they can con

数字钟vhdl实现，在线测试无误，具有闹钟，对表功能(Digital clock vhdl implementation, online testing is correct, with alarm, the table function)

常用的VHDL语言编写的LED灯控制程序,这是教学用的，开发板采用的是EPM240T100C5N，买开发板时附带的程序

最完整最实用的8051的软核，用VHDL语言编写全部原代码，并有详细的注释介绍，对开发增强型多功能单片机或RSIC单片机内核和单片机SOC应用非常有参考价值-most complete most practical of the 8051 soft-core, with all the preparation VHDL source code, and the Notes for a detailed briefing on the development of an enhanced multi-purpose microcontroller core or RSIC microcontroller and microprocessor applications SOC very valuable reference

Material to learn how to use system verilog and how to write testbenches for verification.