一个SNMP AGENT开发工具

12232液晶显示驱动程序-12232 LCD Driver

【cacti】Weathermap使用手册-Cacti] [Weathermap Manual

华为的内部资料，分享-Huawei

难得的SD卡SD模式四线制读写源代码，没有文件系统，简单的暴力读写，可以作为开发参考。

本文详细的介绍了高精度定时的实现，并给出了定时器设置的例子。-this detailed account of the realization of high precision timing, and the timer is set examples.

下载用上位机程序-download procedures using PC

MSP430与液晶显示器的串行接口方案-MSP430 and LCD serial interface program

AT24C64资料 AT24C64资料 -AT24C64 information AT24C64 information

介绍也利用MAX232芯片实现单片机和PC间的通信-Also introduce the use of MAX232 chip MCU and PC communication

低频数字式相位测量仪； 此系统由相位测量仪、数字式移相信号发生器和移相网络三部分组成。为使系统更加稳定，使系统整体精度得以保障，本电路两块T89C52为核心控制器件分别控制相位测量、数字式移相信号发生,在数字式移相信号发生部分采用了锁相技术、CPLD等技术, 使输出波形精度大大提高，并可对频率自动校验，提高频率稳定性。-low-frequency digital phase-measuring instrument; This system consists of phase-measuring instrument, digital phase shifting generator and phase three network components. To make the system more stable, the overall accuracy of the system can be protected, the two T89C52 circuit control devices at the core respectively phase measurement control, digital believe the shift occurred, the digital shift occurred some believe that the use of lock-in technologies, such as CPLD technology, the output waveform accuracy greatly improved, and can automatic calibration frequency, frequency stability.