报警测试程序，用于测试设备中的报警信息，进行和用户之间的显示和对话操作。

dds控制字的详细描述，对新手入门有帮助。-dds a detailed description of control characters, beginners learn to be helpful.

采集数据经pcf8591的A/D转换由89S52处理在LCD显示出来的代码 C语言编写-Collecting data pcf8591 the A/D conversion by the 89S52 handle LCD display language of the code C

AT90CAN128的CAN通信源码测试成功-Source of the CAN communication AT90CAN128 Successful Test

keil c51在编译的时候会将0xfd的字符(有些汉字含该字符的内码)过滤, 而导致程序出错.特别是在做液晶汉字显示时. 针对这个bug.由网友编写了这个补丁. 请下载之后放到你的keilc51in 目录里,运行这个程序.就可以了. 支持v8.02-keil c51 will be at compile time 0xfd characters (some characters with the character code) filter, which led to error. particularly in the so LCD display Chinese characters. To address this bug. prepared by the users of the patch. Please after download put your keil c51 bin directory, run the process. it. support v8.02

用485实现单片机之间的串行通信。 主机部分发送从机地址，等待从机响应，从机准备好就发数据,发完就接收从机的响应，接受成功就跳出循环，否则重发。-MCU with 485 Serial Communication between. Host of this address from the plane, waiting for the response from the plane, from the plane ready to discuss the data, finished on the reception of the response from the plane. set aside for recycling success, otherwise re-issued.

C8051F040 SMBUS/// /////主机接收调试程序-C8051F040 SMBUS//////// receiving host debugger

基于AT89S52单片机的电子万年历设计制作的汇编程序-AT89S52-based single-chip design of the electronic calendar of the assembler

好东西共享给大家,液晶显示的1502的,单片机51系列的-something good for everyone to share, the liquid crystal display of the 1502, the 8031 Series 51!

51单片机学习最好的途径，每章节都有程序作附件-51 SCM best way to learn, each chapter has procedures in Annex

两颗51单片机通过串口通信的代码,独有的仲裁机制使得任一颗单片机都能成为主机.-2 51 Single-chip serial communication through the code, unique to the arbitration mechanism allows any host can become a single-chip microcomputer.