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RFM12B modul reciver-transmitter source code in C

实现蜂鸣器驱动，蜂鸣器应用。非常好的实例。(Buzzer driver, buzzer application. Very good examples.)

一个连接mysql到php的小程序

这是一个DOS系统下关于中断的程序的源代码，可独立测试ISA总线上的15个中断(This is a DOS system on the interruption of the program' s source code, independent testing on the ISA bus 15 interrupt)

sim900a gprs上传数据，51单片机c语言源程序(sim900a gprs upload data, 51 c language source)

说明：  一种新型智能电表的研制 一种新型智能电表的研制(a new smart meters in the development of a new smart meter Development)

实现两个单片机通过SPI同步串行接口通信，一个作为主机负责响应，另一个作为从机负责发送。(Achieve two synchronous serial interface microcontroller via SPI communication, one as the host responds to the other as the slave responsible for sending.)

一个完整的在线调查问卷创建系统，能够方便的为来访者定制调查问卷，还为高级用户提供了复杂灵活的选项，从而能够细挑控制所有的调查方式(A complete online questionnaire to create a system, can easily be customized questionnaire for visitors, but also for advanced users with complex and flexible option, allowing fine control over all pick method of investigation)

Keil C Cortex m3 programming SD card

C++ https 模拟登录 对https进行多线程处理 更高效