232同485转换的pcb图，有需要的只要稍加修改一下就可以了

基于2407平台的spi串行通讯常用例程 -2407 platform based on the commonly used 20 serial communication routines

单片机c语言应用模块程序！ 单片机c语言应用模块程序！-Singlechip c language program application modules! Singlechip c language program application modules!

本文介绍了AT89C2051单片机的性能和特点，并在分析了超声波测距原理的基本系统框图。该设计系统经校正后，其测量精度可达0.1米-This paper introduces the AT89C2051 performance and features, and the analysis of the ultrasonic distance measurement principle diagram of the basic system. The design of the system calibration, measurement accuracy of 0.1 meters

用凌阳单片机开发的迎奥知识问答机器人。 通过语音识别功能。实现全语音操作。 能通过语音操纵它前进，后退，左转，右转，跳舞，并且能进行交互式的知识问答。如果回答错了，机器人将给于正确答案还和一句鼓励的话，如果回答对了机器人将为你跳一段舞，全部答目答完后会给出总成绩。-Single-chip developed by Sunplus Ying Austrian robot quiz. Via voice recognition. Realize full-voice operations. Voice manipulation it can move forward and backward, turn left, turn right, dancing, and can be interactive quiz. If the answer is wrong, the robot will be in the correct answer and also an encouragement, and if the answer to will you jump for some robot dance, all the heads at the end of A will give a total score.

51单片机c语言编程实例及一些经验，很实用的。-51 MCU c language programming examples and some experience, it is practical.

采用C51编写的基于C8051F020单片机的定时器实用程序。-using C51 prepared by the C8051F020 timers utility.

linux环境下开发SD card驱动得好帮手-linux environment to develop a good SD card driver help

从串口调试工具发送一字符串到单片机，在lcd1602上显示。-Debugging tools from the serial port to send a string to the microcontroller, in lcd1602 show.