利用51单片机演奏音乐。定时器控制歌曲的频率（音调），延时时间控制节拍，可以轻松更改为自己想要的歌曲...

鉴于MCS-51系统只提供“二级中断嵌套”，提出扩展51系统中断优先级的纯软件方法。其利用51系统内建的中断允许寄存器IE和中断优先级寄存器IP，通过屏蔽字机制来实现；以C51的形式，给出这种扩展方法的函数库实现，为该方法的使用赋予友好、简洁的用户接口。-Given MCS-51 systems only provide "two interrupt nesting," expanded 51 priority system interruption of pure software. The use of 51 built-in system allows interruption Register IE and priority interrupt register IP, through word shielding mechanisms to achieve; C51 in the form of this expansion is the way to achieve functions, methods for the use of empowerment friendly, simple user interface.

51系列单片机的IIC软件包，模拟通信软件包，可以和具有IIC的芯片使用-51 Series MCU IIC package, analog communications package, you can chip and the use of IIC

液晶显示器（LCD液晶显示面板）和LCD模块（LCM液晶显示模块）的开发与设计

Knowledge-Based Image Understanding Systems A Survey

在嵌入式开发中，AVR单片机驱动 128*64的KS0107液晶的实例。非常易于大家的移植。-In the embedded development, AVR single-chip driver 128* 64 LCD KS0107 example. We are very easy to transplant.

单片机对SJA1000的驱动，包括初始化，收发数据，中断- MCU drive for SJA1000(include initial,transmit and receive data,interruption and so on)

HT1621中文资料，文档为翻译内容，不保证资料的完全正确性-HT1621 Chinese information, the contents of the document for translation, does not guarantee the complete accuracy of information

转载单片机实现TCP/IP协议的完整C源程序，带程序注解的，供大家研究-reproduced MCU TCP/IP protocol complete C source code, annotated with procedures for everyone to consider! !

LUMINARY ARM的PWM代码（带死区控制）-LUMINARY ARM code of PWM (with dead-zone control)

1602字符液晶驱动实例源代码，在keil c上调试通过并实际验证-1602 characters LCD driver source code examples in keil c debug adopted and the actual verification