这是一个430的延时程序，能够比较精确的延时n us,或者n ms

DP_51PRO实验仪图形液晶显示实验。先在屏幕上的随机位置显示随机数字(0--9)， * 然后调用画直线函数以屏幕中心为中点画对称的直线，最后显示一个简单的窗口。-Experiment DP_51PRO graphics liquid crystal display experiment. First in a random location on the screen shows random number (0 9),* then calls the function to draw a straight line in the screen center line stipple symmetry, and finally shows a simple window.

该文档包含了keilc常用的子程序，共有２５个运算类代码，非常实用．-This document contains commonly used keilc subprogram, a total of 25 computing category code, very useful.

振中掌机程序符合645规约，用的是电力97规约，支持多费率，功能齐全-Vibration in the PSP process in line with 645 of the Statute

60个命令,..对初学都很有实用价值,值得参考-60 orders for the beginner .. have a great practical value, it is also useful ..............

embed in keil

利用8051驱动MAX1898，实现智能化的充电器。-Use 8051 driver MAX1898, realize intelligent charger.

基于51单片机，实现RS232和RS485两机通信，包含详细说明！

用SST89C58,对微型打印机和液晶的显示-With SST89C58, on the micro-printer and liquid crystal display

单片键盘扫描keil源码-single source c51 keyboard scan

会议计时器，以MCS51单片机为核心，实现会议演讲定时提醒功能，可以进行设定时间，倒计时，暂停，蜂鸣器提醒或灯光提醒等功能-Session timer to MCS51 single-chip microcomputer as the core, the realization of the meeting from time to time to remind the function of speech, you can set time, the countdown, suspension, or a buzzer to remind lighting functions to remind