ROM的4位的话。

用verilog写的基于cpld的出租车计费器的源码，需要的参考一下-Use verilog to write a taxi based cpld billing device source code, need to refer to

Verilog 语言写的控制 DAC8568 的模块，DAC8568 是SPI接口。(Verilog language used to write the control module DAC8568, DAC8568 is SPI interface.)

FPGA数字信号处理实现原理及方法的例程(FPGA digital signal processing principle and method routines)

HDB3编码通过verilog实现，通过modelsim仿真(HDB3 coding is implemented by Verilog and simulated by Modelsim)

uart接收模块 // 波特率：9600 // 数据位：8 // 停止位：1 // 校验位：0(UART receive module Baud rate: 9600 / / / data: 8 / / stop: 1 / / check digit: 0)

用MSP430进行压力测试，完成数据的分析(with msp430 to continue on press test.to complete about the anlysys about data)

用窗函数法设计一个线性相位FIR数字低通滤波器，用理想低通滤波器作为逼近滤波器，通带截止频率为0.2 ，阻带截止频率为0.4 ，阻带衰减不小于-40dB。(Window function method to design a linear phase FIR digital low-pass filter, as an ideal low-pass filter for approximation filter passband cutoff frequency of 0.2 stopband cutoff frequency of 0.4, the stop-band attenuation of less than-40dB.)

共两个文件，一个是对网络芯片W5500进行控制的master spi接口，另一个是w5500命令控制逻辑，命令格式按照w5500芯片的要求，分为地址段，控制段和数据段进行统一控制。此外提供w5500芯片初始化及读写控制流程图。(A total of two documents, one is the master SPI interface for network control chip W5500, the other is a w5500 command control logic, command format in accordance with the requirement of w5500 chip, divided into address segment, unified control and data segments. In addition to provide w5500 chip initialization and read and write control flow chart.)

quartus 中，自己写的tcl，分配io的例子。-Quartus in their own writing tcl, distribution io example.

说明：  vivado的license ,可以用在2019.1,2019.2,在win10 64bit上已检验过.(It can used in vivado2019.1,2019.2)