本程序是功能是实现51单片机与PC机之间的通信，程序简单

芯片at89s52，在上面完成一些如led 点阵 PS键盘 串口 等基本操作 对于初学51的有参考价值-Chip at89s52, in the above example, the completion of some led dot matrix keyboard PS serial basic operation such as 51 for the beginner has reference value

初学单片机的一个实例运用，以at89c2051为例，用c语言编写的时钟程序。程序采用了两级中断，具有时钟及秒表功能。-beginners MCU use an example to at89c2051 example, the language used c clock procedures. Adoption of the two suspended, with the clock and stopwatch functions.

介绍了一种用单片机io口模拟实现串口功能的方法，并提供了简单的实现方法-introduced a microcontroller with io I Serial functional simulation methods, and to provide a simple method

PC机与单片机之间通过串口进行通信 已测试通过-Between PC and MCU to communicate through the serial port have been tested

scan file in microstation, simple example

usb host读写U盘！-usb host U-reader!

485多机通信例程,很好用,适当修改可做单机使用-no

tlc1543芯片的ad转换，用max7219驱动八位数码管显示转换电压值-tlc1543 chip ad conversion, with the max7219 driver 8 digital tube display conversion voltage value

心电信号的计算机分析毕业论文-ECG analysis of the computer Thesis

PTR8000发送接收驱动程序。只需在主程序中只需做小小的改动就可以，使用这个模块！！！ -Send PTR8000 receive driver. Only in the main program in only small changes can make use of this module! ! !