4位密码锁完成

此为串级PID控制源代码，他具有比普通PID控制的诸多优点！(This cascade PID control for the source code, he has the ordinary PID control than many advantages!)

由于太阳能充电系统多在户外，为了方便研究太阳能充电控制系统对蓄电池的充电情况，本文使用GPRS无线传输技术，设计了一套太阳能充电系统蓄电池的充电电压电流远程实时监测系统。系统的硬件部分由电压电流检测电路、单片机STC89C52RC、GPRS模块SIM300以及相应的外围电路构成，下位机软件由C语言编写并与硬件部分构成系统下位机部份，实现了对充电电压电流的信息采集以及数据的无线数传。上位机在LabVIEW2010环境下编写，具备友好的人机交互界面，实现了数据的远程接收、实时显示、数据库管理、报表生成和打印等功能。经过系统测试系统实现了对电压电流的远程监测。(As the solar charging system more outdoors, in order to facilitate the study of solar charge control system for charging the battery case, we use GPRS wireless transmission technology, we designed a solar charging system battery charge voltage and current remote monitoring system. The hardware part of the system by the voltage and current detecting circuit, microcontroller STC89C52RC, GPRS module SIM300 and corresponding peripheral circuits, lower computer software written in C language and hardware parts lower position machine part of the system, the realization of the charging voltage and current information collection and wireless data transmission of data. PC at LabVIEW2010 prepared environment, with friendly interactive interface, realize the remote receiving data, real-time display, management, report generation and printing. After the system test system enables remote monitoring of voltage and current.)

使用PIC16F877 picc编译环境做的红外遥控接收程序(Environment using the PIC16F877 picc compiler to do infrared remote control receiver)

串口发送数据，字符，12864接受并显示字符(Serial port to send data, the character, to accept and display the character 12864)

实现一个简单的电梯控制器,能够完成一个四层电梯的控制(The realization of a simple elevator controller, to complete a four storey elevator control)

应用于线性代数计算的小程序，C语言编程。可进行行列式计算、代数余子式值、矩阵的加减乘除、求逆、求秩等计算(Applied linear algebra applets, C language programming. Determinant can be calculated, the value of algebraic, matrix addition and subtraction, multiplication and division, inverse, rank, etc. demand computing)

bppid源程序 直接运行可仿真出结果 包括误差曲线 跟踪曲线 参数自整定曲线(bppid source can be directly run the simulation results, including tracking error curve curve parameter self-tuning curve)

本文介绍一种利用单片机本身所提供的串行通讯口，采用自定义串行通信协议，加上总线驱动器如MAX481、MAX483、MAX485、MAX487等组合成简单的RS－485通讯网络，完成单片机间的多机通讯。(This article describes a serial communication port provided by the microcontroller itself, the custom serial communication protocols, coupled with the bus driver, such as the MAX481, MAX483, MAX485, MAX487, combined into a simple RS-485 communication network, complete single-chip between themulti-machine communication. )

采样法生成三相SPWM波的开环调速控制程序载波频率为20KHz，或载波周期为50μs。DSP晶振10MHz，内部4倍频，时钟频率为40MHz，计数周期为25ns。假设调制波频率由外部输入（1～50Hz），并转换成合适的格式(Sampling method to generate three-phase SPWM wave open-loop speed control procedures for the carrier frequency 20KHz, or carrier period is 50μs. DSP crystal 10MHz, internal 4 multiplier, the clock frequency of 40MHz, counting cycle 25ns. Assuming wave frequency modulation by external input (1 ~ 50Hz), and converted into a suitable format)

房间脉冲仿真，用于仿真房间的声音脉冲，对于研究声在环境的意义重大(Room pulse simulation, simulation room for the sound pulse, the significance for the study of acoustic environment in major)