这个代码是用8989C51和12887开发的。

51做的门禁系统代码，有4×4键盘扫描，9346的存储功能，掉电不丢失密码，3重密码防忘记功能-51 of the Access Control System code, a 4 4 keyboard scanning, the 9346 storage functionality, nonvolatile not lost password, three heavy-forget the password function

电子万年历 已经过实物检测，完整的毕业论文。而且附带毕业论文，源程序。ds18b20 实例应用-Calendar has been kind of electronic detection, a complete thesis. And incidental thesis, the source code. Examples of applications DS18B20

周立功的LPC214X关于中断捕获查询实验.-Ligong LPC214X weeks of inquiries concerning the interruption of capture experiments.

usb host的驱动程序,用于实现usb端口的初始化等-usb host driver for the usb port initialization realize such

avr单片机的串口程序，用于操作avr单片机的串口，可以实现发送接收字符、字符串。-SCM avr serial procedures, for the operation of single-chip serial avr can be achieved Send receive characters, strings.

串行通讯_查询方式_switch处理 有详细的文字字说明 方便使用者修改-Serial communication means _ _switch handle inquiries have detailed user-friendly text words modify

PIC18F4550 SD CARD USB

pic单片机中时钟芯片1302的应用 此文件已经过实际应用-pic microcontroller in the application of clock chip 1302 has been the practical application of this document

USB带宽测试的程序，针对CY7C68013的USB2.0接口芯片，编译环境为KEIL -USB bandwidth test procedures against CY7C68013 USB 2.0 interface chip, compile environment for KEIL

基于AVR单片机的CH451一应用。8个数码管，16个按钮开关。-Based on the AVR MCU application CH451 1. 8 digital control, 16 button switch.