rolling program of the design code for beginners reference

 本系统基于 C8051F020 实现等精度的频率测量， 利用该单片机灵活的控制功能及速 度优势，大大提高了性能和测量精度。以往的测频都是采用高频段直接计数、低频段间接测周 的方法，其测量精度往往会随着被测频率的改变而受到影响。为了克服测频中高低频段测量精 度不等的缺陷，采用双计数器设计，实现等精度的频率测量。等精度的测量方法不但具有较高 的测量精度，而且在整个测频区域内保持恒定的测量精度。 

VB icom控件例程，比较详细，可以参考-VB icom control routines, in more detail, you can refer to

自营店增加查看缴款记录功能，可以查看门店缴款。 记录数据，门店只能查看自己的缴款记录。 使用同价调拨和变价调拨可以产生相应的GSP报表，即做完同价调拨和变价调拨，可以到对应报表中调用同价调拨单和同价调拨单生成GSP报表。 增加“盘点数量为零商品显示”功能，并增加对盘点时有改动商品的颜色标注，便于对有盘点改动商品的进行跟踪，并且可以在盘点过程中添加电脑中没有的库存商品（自动盘营盘亏中）。 库存盘点时增加“产地”、“备注”和“生产厂家”字段（自动盘盈盘亏）。-payment record increase View function can check stores contributions. Records data, stores can only check their payment record. Using the same price allocation and price changes can have a corresponding allocation of the GSP statements, the same price that is done allocation and price variable allocation, statements corresponding to the call to allocate the same price and with the price of single-generation GPS allocation statements. Increase the "zero inventory quantity of goods shows that the" function, and increase the inventory of goods has changed the color tagging, facilitate inventory changes to a commodity tracking, and inventory in the process of adding a computer without the stock (automatic disk business inventory

实验一_LED小灯亮,实现单片机控制LED小灯，流水灯功能-Experiment 1 _LED small lights, to achieve single-chip microcomputer to control a small LED lights, water lights function

Symbian OS S60平台2D游戏引擎案例

让两个眼球跟着你的脸而转的系统，不是原创，但发现做了也挺有意思 -The two eyes follow you, they turned to face the system, not the original, but it was found that also make a quite interesting

用VB开发的简单图像二值化的代码，本程序只做交流使用-VB developers to use a simple image binarization code, the exchange of use of this procedure Zhizuo

注塑机生产过程的微机控制系统设计本系统设计是通过8255A并行端口A、B传输数据控制12个LED发光二级管的亮灭来模拟控制两台注塑机的生产过程。其中端口A和B分别对应1号和2号注塑机，每一个LED代表一个工序。编程语言采用BORLAND C++语言。-injection molding machine of the production process computer control system design of the system design through 8255A Parallel Port A, B transmission of data control 12 LED light emitting diode to the analog-to eliminate two injection molding machine control the production process. These ports A and B respectively counterparts on the 1st and the 2nd injection molding machine, each one represented an LED processes. BORLAND programming language using C language.

模拟股票下载小软件,可以组建自己的股票学习或操作环境-Simulation of the stock to download a small software, can set up their own shares learning or operating environment

四个拨码开关，拨上去对应的前四个LED灯亮，体现了pld io功能的灵活。请把拨码开关右上方的跳线帽跳上，同时拔掉ADC0804的跳线帽。-Four DIP switches, dial up the corresponding first four LED lights, reflect the function of flexible pld io. Please dial code switch at the top right of the jumper cap jumped, and pulled out the jumper cap ADC0804.