verilig准备使用CPLD读写EEPROM（74lc21）程序

经过一段时间的使用，上次的硬盘MP3播放器增加了USB下载文件功能； 汉字LCD显示功能；子文件夹功能等。并对软件做了一些修改。并将 硬件电路图画出来了。由于做得仓促，难免有不妥之处，请大家谅解， 欢迎指出错误。谢谢。-After a period of use, the last of the hard disk MP3 player, an increase of USB download files function characters LCD display Subfolders functions. And the software to do some modifications. Hardware circuit and the pictures came out. As a result of doing a rush, inevitably something wrong with the U.S. understanding, please welcome to point out the error.谢谢.

Hardware_PCB_Interface，硬件pcb 接口-Hardware_PCB_Interface, hardware interface pcb

gb2312到unicode转换的文件，用在AVR里面估计占比较大的Flash空间-gb2312 to unicode conversion of documents, used in AVR inside the larger proportion is estimated Flash space

单片机控制122x32液晶。液晶内部芯片包含RAM（类似于显存），当然不具备2D3D加速。不过，功耗非常低，一般几个毫瓦。-SCM 122x32 LCD. LCD chip contains an internal RAM (similar to memory), of course, does not have to speed up 2D3D. However, power consumption is very low, generally a few milliwatts.

数码管段码速查,在单片机开发时，很容易的控制数码管-digital control of the Code Check, in MCU development, it is easy to control the digital control

恒压供水测试程序，用的是51系列的单片机-constant pressure water test procedure, the 51 series of MCU

本程序是基于avr单片机的atmega48的控制16*4点阵型液晶。其中main文件调用LCD.c和LCD.h文件。用户可以直接把工程中的LCD.c和LCD.h文件放到自己的程序目录下即可。-This procedure is based on the avr SCM atmega48 control 16* 4:00 LCD. Main document which calls LCD.c and LCD.h document. Users can directly to the project document LCD.c and LCD.h procedures on their own directory can be.

单片机的C语言应用程序设计（修订版）,有需要的就下吧-SCM C language application programming (revised edition), we need it on the next

设计一个允许n个进程并发运行的进程管理模拟系统。该系统包括有简单的进程控制、同步与通讯机构，其进程调度算法可任意选择。每个进程用一个PCB表示，其内容根据具体情况设置。各进程之间有一定的同步关系（可选）。系统在运行过程中应能显示或打印各进程的状态及有关参数的变化情况，以便观察诸进程的运行过程及系统的管理过程。-N the design of a permit to run a process complicated by the process management simulation system. The system has a simple process control, synchronization and communication agencies, the process scheduling algorithm can be arbitrary choice. Each process of a PCB said that its content in accordance with the specific circumstances of settings. The process has a certain degree of synchronization between the relationship between the (optional). System in the running process should be able to display or print the status of the process and the relevant parameters in order to observe the operation of various process and systems management processes.

使用51单片机用算法的方式来产生SPWM的程序-Use 51 MCU way to use the algorithm to generate SPWM program