verilog HDL编写的出租车计费系统

vhdl波形发生程序.实现4种常见波形正弦、三角、锯齿、方波（A、B）的频率、幅度可控输出（方波 A的占空比也是可控的），可以存储任意波形特征数据并能重现该波形，还可完成 各种波形的线形叠加输出。 -vhdl waveform occurred procedures. 4 achieve common sinusoidal waveform, 1.30, sawtooth, square-wave (A, B) the frequency and amplitude control output (square A duty cycle is also controllable), can store data of arbitrary waveform characteristics and able to reproduce the waveform, but also through a variety of linear superposition of the waveform output.

SOPC系统的I2C代码 直接可用，可作为ＩＰ核用到自己的系统中(SOPC system I2C code directly available, can be used as an IP core in your system)

说明：  系统介绍了数字开发系统平台FPGA设计中的部分技巧 对于FPGA开发研究人员具有一定的指导和帮助意义(Systematic introduction of digital development platform FPGA design techniques for FPGA development of some of the researchers have some sense of guidance and help)

This application note explains the process of eveloping and debugging a hardware abstraction layer (HAL) software device driver, to aid device driver development for the HAL of the Altera Nios® II system. The various software development stages are illustrated using the Altera_Avalon_UART as an example hardware device, and an example of a HAL software device driver called my_uart.-This application note explains the process of eveloping and debugging a hardware abstraction layer (HAL) software device driver, to aid device driver development for the HAL of the Altera Nios® II system. The various software development stages are illustrated using the Altera_Avalon_UART as an example hardware device, and an example of a HAL software device driver called my_uart.

在VHDL结构体中用于描述逻辑功能和电路结构的语句分为顺序语句和并行语句两部分，顺序语句的执行方式十分类似于普通软件语言的程序执行方式，都是按照语句的前后排列方式顺序执行的。(VHDL structure in the body used to describe the logic function and circuit structure of the order of statements and expressions are divided into two parts in parallel statement, modalities for the implementation of the order of statement is very similar to ordinary language software program implementation, are in accordance with the statements before and after the arrangement of the order implementation.)

High-Speed Data Serialization and Deserialization(840 Mb/s LVDS) for xilinx fpga

8b10b编解码，用于光通信和千兆以太网，verilog编写，已验证(8b10b codec for optical communications and Gigabit Ethernet, verilog prepared Verified)

一个用VHDL语言编写的双端口存储器程序，可下载在FPGA中使用-Written in VHDL language using a dual-port memory program can be downloaded in the FPGA using

说明：  关于计时器 verilog语言，采用arm架构的m3，可以直接应用于soc(About timer verilog language, USES the arm architecture of m3, can be directly applied to soc)

用FPGA于32进行SPI单向通信，FPGA向32放松发送数据(One-way SPI communication is carried out in 32 with FPGA, and data is sent to 32 with ease by FPGA.)