首先再次声明我是菜鸟，我写出来的目的是给没有接触过lcd的朋友看得，我本人水平有限，错误在所难免，欢迎指出。...

AD9850 DDS控制子程序 经常做其他的单片机实验，还没做过DDS的实验。最近打算写个程序试验一下。 -AD9850 DDS control subroutine Singlechip often to do other experiments, not yet done DDS experiment. The recent plan to write a program to test.

自己现在用的51系列单片机下载线，用74HC244芯片 -himself with the 51 series microcontroller downloaded line with 74HC244 chips

单片机控制电动机的运转，使电动机向一个方向逐渐加速，然后减速，然后在向另一个方向逐渐加速，再减速，如此循环下去。-Microcontroller to control the motor operation, so motor to accelerate gradually in one direction, then slow down, and then a gradual acceleration in the other direction, then slow down, and so cycle continues.

AD9850的一个实际例子 一般可用于DDS数字合成技术

一个任务显示LED，一个扫描键盘，一个任务将键值转化为显示格式（无时间要求） 键盘模块完全参照巨人老师例程； 显示很简单：1、判是否到2ms 2、送显示 键值处理：1、有无有效信息 2、弹出有效信息处理队列 3、将信息处理；键值处理不随1ms动作-a task LED, a scanning keyboard, a pair of tasks into a display format (no time requirements) keyboard module is taking giant teachers routines; Show is very simple : one, whether sentenced to two 2ms sent show keys : 1, the effective availability of information 2 , pop effective information processing cohort 3, information processing; the pair handle moves with 1ms

此程序为单片机开发过程常用的led小灯闪烁的小程序。用asm编写，供参考。-procedure for microcontroller development process commonly used by small lights flashing led the small program. With asm prepared for reference.

P T 2 2 5 7 详 细 中 文 资 料-PT 2 2 5 7 detailed Chinese data

source led giao tiep qua cong LPT

利用单片机进行超声波测距的功能，距离不太高。-Ultrasonic distance measurement using microcontroller functions, the distance is not too high.

一个使用ARM7TDMI LPC2104的一个点阵屏程序。-an ARM7TDMI LPC2104 use of a lattice screen procedures.