一些有关c51的小程序，编译已经通过，希望对大家有用

完整的实现RS232与TCP/IP网络协议的转换-Realize the full RS232 and TCP/IP network protocol conversion

64位键盘扫描程序，调试通过。51系统，keil-51编写-64 keyboard scanner, debugging through. 51 system, keil-51 preparation

用单片机做的数字万年历，基于MAX12887数字时钟芯片和MAX7219芯片。-Done with single-chip digital calendar, digital clock MAX12887-based chip and MAX7219 chip.

瑞士盛世瑞恩公司的温湿度传感器SHT11的温湿度测量的例子程序。- Swiss prosperous times auspicious graciousness company s warm humidity sensor SHT11 warm humidity survey example procedure.

一个非常好的单片机读写液晶的程序，已经服了源码。-A very good single-chip LCD to read and write procedures, had already served a source.

《单片机C语言编程与实例》的代码集，可供参考编程用- Single-chip C language programming with examples of the code set is available for reference, programming by

单片机音乐播放程序，附带三首已编音乐代码，音乐调声可调-Singlechip music player program, three have been incidental music code, music, acoustic tune adjustable

pROFIBUS 从站源程序 SPC3 pROFIBUS 从站源程序 SPC3 -PROFIBUS slave source SPC3 pROFIBUS source from the station SPC3

usb程序 硬件用的是isp1518，传输方式dma-usb hardware procedure is used isp1518, transmission dma

使用protel99软件编辑的原理电路图，希望对各位有助于电路图的学习和开发-The use of the principle of circuit protel99 software editor, in the hope you will help the study and development of circuit