RS232通信程序，初学者的入门程序，很有用的

关于ADuC845中URAT功能所写的小程序-On the ADuC845 in URAT function of small programs written by

修改后的PDIUSBD12完整固件源码，实现51单片机的USB接口，完全通过测试。-revised PDIUSBD12 integrity of the firmware source code, achieving 51 SCM"s USB port and fully tested.

用keil51开发的7219程序实现led显示-7219 with the development of procedures keil51 realize led display

nrf24e1有关PWM的源码程序，通过keil c验证，在相应的开发板上调试运行过-nrf24e1 the PWM of the source program, verified by keil c, in the corresponding development board debug run-off

自制AT89S51编程器教程 编程器制作包 1.1 修正了电路两处错误。 编程器制作包 1.2 增加了一个下载线调试程序-homemade AT89S51 programmer Programming Guide for the production of 1.1 amendments circuit two errors. For production programming packages increased by 1.2 download a line debugger

Real Time Operating Systems Real-Time Systems - Issues-Real Time Operating Systems Real-Time Systems- Issues

sd卡mp3官方pcb文件，protel格式-sd card mp3 official pcb file, protel format

SD卡读写程序 1. sdconfig.h: 该文件为SD卡读写模块配置头文件，用户可根据实际硬件条件进行修改. 2. SD目录: SD卡读写模块的全部文件,一般不用修改. 3. 建议sdconfig.h文件不要放于SD目录中，因为SD目录中的文件一般无须修改, 而sdconfig.h通常会有改动.-1. Sdconfig.h: The document for the SD card reader module configuration header files, the user hardware according to actual conditions can be modified. 2. SD directory: SD card reader module of all the documents, the general need not be amended. 3. Proposed sdconfig. h files directory should not be put in SD because SD files in the directory are not normally required to be amended and the changes are usually sdconfig.h.

在现代电子系统中，有为数众多的IC需要进行相互之间以及与外界的通信。为了提供硬件 的效率和简化电路的设计，PHILIPS开发了一种用于内部IC控制的简单的双向两线串行总线I2C-In modern electronic systems, there are a large number of IC need each other and communicate with the outside world. In order to provide the efficiency and simplify the hardware circuit design, PHILIPS developed an IC for internal control, a simple bi-directional two-wire serial bus I2C.