the conmunication of MCU by USB2.0

这是通讯接口实验《异步串行通信实验》的原理程序，适合于那些上嵌入式系统、通信、计算机专业的人-This is the communication interface experiment, "asynchronous serial communications experiment," the principle procedures, suitable for those on embedded systems, communications, computer specialists in the

简易正弦波三角波方波发生器 使用keil C51,12MHZ晶振,AT89C2051 -Simple sine wave square wave triangle wave generator using keil C51, 12MHZ crystal, AT89C2051

本设计以P89V51RD2FN单片机为电动小车的控制核心，采用MSA-LD2.0倾角传感器实时测量跷跷板的倾斜角，用ST198光电传感器检测黑色引导线监测小车运动。光电传感器和倾角传感器模块把实时测量信号馈送至单片机，利用专用细分芯片TA8435H驱动步进电机，以脉宽调制式斩波方式对步进电机步进角进行细分，控制和调节小车速度。采用增量式PID控制算法确保小车能够达到平衡；用RT128×64M液晶显示时间、角度等参数。经测试表明：小车各项性能指标达到设计要求，能够实现30秒内小车行驶到规定点，并保持跷跷板平衡；在跷跷板一端配重可调整的情况下，小车也能自动找到平衡点并保持跷跷板平衡。-The single-chip design for the electric car P89V51RD2FN control of the core, the MSA-LD2.0 seesaw angle sensor real-time measurement of the tilt angle, the detection of black ST198 photoelectric sensor to monitor vehicle movement and guide lines.Photoelectric sensors and angle sensors in real-time measurement module to feed the signal to the microcontroller, using a dedicated sub-chip stepper motor driver TA8435H to PWM chopper-type stepper motor on the sub-stepping angle, control and regulation vehicle speed. The use of incremental PID control algorithm to ensure that the car can achieve balance with LCD RT128 × 64M time, angle and other parameters.After the test showed that: the performance car

欧几里德算法：辗转求余　　原理: gcd(a,b)=gcd(b,a mod b)　　当b为0时,两数的最大公约数即为a　　getchar()会接受前一个scanf的回车符-Euclidean algorithm: Principles of travel for more than: gcd (a, b) = gcd (b, a mod b) when b is 0, the two common denominator is the number of a getchar () will accept the previous scanf carriage return

用c语言实现PID算法的程序，在PID算法的使用过程中十分有用，只要自己修改一下参数，即可用于不同的控制领域。-Used to achieve PID algorithm c language procedure, use of the PID algorithm process very useful, as long as their own tinkering parameters, can be used for different control.

atmega128 读取18b20并液晶显示-ATmega128 read 18b20 and liquid crystal display

飞利浦51LPC系列单片机对交流电机控制的电路原理图和源程序-51LPC Philips Microcontroller series of AC motor control circuit schematic and source

基于ISD4004 的录音系统。该设计通过对ISD4004 语音芯片的介绍,使读者熟悉了1SD4004 的基本应用。同时给出了单片机控制下的硬件电路和软件设计,使读者对系统有一个详细的了解。-ISD4004-based recording system. The design through the introduction of the ISD4004 voice chip so that readers familiar with the basic application 1SD4004. At the same time, given under the control of a single-chip hardware circuit and software design, so that readers on the system has a detailed understanding.

24c16源代码，经过验证，已经在许多地方使用过。-24c16 source code, proven, in many places use.

基于AT89C51的数字时钟，6位LED显示。