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AT89C2051中文手册，AT89C2051是非常便宜的51系列单片机，简单好用。-AT89C2051 Chinese Manual, AT89C2051 is a very cheap 51 series microcontroller, easy-to-use.

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.

此函数把SPI的读写功能集成在一块，传递的val既是向SPI写的数据，也是从SPI读取的数据，只需要在执行读或写之前把MCU的I/O脚设置成相应的输出或输入即可。（因为在大部分应用中，是把SPI的DI和DO相连并用MCU的一个IO口来读写）。-This function of the SPI read and write functionality into a single, transmission of val is not only written to the SPI data is read from the SPI data, only need to read or write in the implementation prior to the MCU

简易信号发生器，可产生正弦波、方波、三角波，幅度、频率都可调节。-Simple signal generator can produce sine, square, triangle wave, amplitude, frequency adjustment can be.

PCB布线设计快速最优通道布线算法-PCB wiring design fast optimal channel routing algorithm

发射芯片nrf24e1的控制字配置，发射子程序 与单片机的通讯-Launch control chip nRF24E1 word configuration, launch communications subroutine with SCM

CM12864驱动程序 ARM控制LCD显示数字还有屏幕保护功能，此程序最大的特点就是CM12864的驱动，非常有用。-CM12864 driver ARM control LCD screen display digital still function, this procedure is characterized by the largest CM12864 driver, very useful.

pci7222单片机的驱动程序 ，欢迎大家来下载。-SCM pci7222 driver, welcomed everyone to download.

cf8020+cp2200(网络)的驱动实现-cf8020+ cp2200 (network) drivers realize