在PC机上进行的8250串口实验，采用汇编语言编写

利用51单片机对自行车/电动自行车的速度进行测量，并显示里程和速度-The use of single-chip microcomputer 51 of the bike/electric bicycle speed measurement, and display the mileage and speed

单片机AT89C2051来编程，轻触式步进调整控制电路。原理图、源程序。-Single-chip AT89C2051 to programming, touch-step adjustment control circuit. Schematics, source code.

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.

汇编,bios功能调用,直接控制光驱开关-compilation, bios function, direct control drive Switches

多功能按键判断程序，可以自如的判断何健按下-Multi-function button to determine the procedure, you can easily judge Arthur Press

it is about c++ code of some computer graphic program

具有按键控制,时间可调,可设定闹钟时间,LED显示-with button control, adjustable time, set alarm clocks, LED Display

汇编程序案例9音乐演奏music.rar-Nine cases assembler music music.rar

利用VB语言实现SQL数据库和数据库中表的建立，减少了用户直接手动输入的麻烦。-VB language implementation using SQL database and the establishment of a database table, reducing the user directly to the trouble of manually entered.

ARM_Embedded_C_Programming_Language.rar看一下，ARM C编写程序的教材。-ARM_Embedded_C_Programming_Language.rar look, ARM C programming teaching materials.