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用VB实现USB功能，主要是通过调用EasyD12.dll动态连接库函数,控制USBU端对 DP-51学习板24WC02时行读写控制。-VB USB functions, mainly through call EasyD12.dll DLL function, USBU-right control of DP-51 learning at the plate WC02 24 firms control read and write.

实现账号输入时信息，输入账号和密码，图形显示-Input to achieve account information, enter the account number and password, and graphical display

矩阵键盘扫描扫描之线反转法.asm把扫描到的键值，通过计算机的串口发送出去。-KEY scanning line inversion method. Asm

1，消除按键的抖动问题 因为按键在闭合或断开过程中出现一段抖动期，主要由于按键的不稳定性引起的，这时会呈现一串页脉冲，时间的长短和开关的机械特性有关。一般在5ms~10ms之间。为保证CPU对键的一次闭合作一次处理，必须去抖动。在键的稳定闭合或断开时读键的状态。 2，据EICE51原理图编写并调试一个键输入子程序，其功能为判断键盘上有无键输入，若有键入，作去抖动处理后，计算输入键的键号送累加器A。-eliminate jitter button issues as keys or disconnect the closure process for some jitter period, mainly due to the instability of the keys to the cause, then it will result in a bunch of pages pulse, the duration and switches on the mechanical properties. General ~ 10ms between 5ms. To ensure that the CPU in a pair of keys a close cooperation, must go jitter. The key to the stability closed or disconnected when reading the key state. 2, EICE51 schematics prepared and debug a key input subroutine, and its function of determining whether keys on the keyboard input, if typing for to handle jitter, the admission of Bond, Bond sent accumulator A.

ht1621 LCD driver 源码，可做断码显示屏用-ht1621 LCD driver source code can be broken screen with

一个数字时钟的汇编语言程序-a digital clock Assembly Language Program

有关统计学生成绩的汇编程序，详见压缩文件内容-Relating to the compilation of statistics on student achievement program, as detailed in the contents of compressed files

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本代码为本人基于汇编语言的51单片机课程上机考试程序。;实验要求;利用P1/P2口或8255的接口电路和实验台上提供的六个数码管显示，设计一个电子钟，;电子钟设计如下格式   XX XX XX由左向右分别为时、分、秒;本人采用定时器溢出中断确定时间基准，main函数对共阴数码管进行动态扫描;p1口作为位选信号输出端;P2口作为段选信号输出端

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