使用51单片机用算法的方式来产生SPWM的程序

cmx868的应用程序 用于电话机的缴费终端的设计 经过调试 可以应用欢迎大家下载 -cmx868 application fee for the telephone terminal can be applied to the design after debugging welcome you to download

单片机AT90S系列 制作简易USB接口（软件模拟,无usb硬件）。asm源代码- Monolithic integrated circuit AT90S series manufacture simple USB connection (software simulation, non- usb hardware). Asm source code

C51定时器应用－实时时钟-C51 timer application-real-time clock

VB与S7200的PPI通信-VB and the PPI communications S7200

此为按键部分的,读取按键值是否有按键判断部分函数-this as part of the button, reading keys value judgment whether some function keys

自制电池修复仪的电路图,自制电池修复仪的电路图-Homemade battery circuit instrument repair, instrument repair homemade battery circuit

4*4数字键盘输入温度极限值，DS18B20测温，数码管显示温度值，蜂鸣器和LED报警-4* 4 digital keyboard input temperature limit, DS18B20 temperature measurement, digital display temperature control, alarm buzzer and LED

单片机读写优盘，实现了单片机读写优盘的功能 还有FAT32文件系统 的实现-USB single-chip reader, realize a single-chip USB function to read and write FAT32 file system also realize

用C51中I/O口摸拟串口-simulate serial port with I/O port in language of C51

基于89S51单片机，实现正统，方波和三角波的输出-89S51-based single-chip, to achieve legitimacy, square and triangle wave output