vb编写的上位机程序，可以实现的功能是单片机和上位机的通讯功能...

通用串口通讯,C51程序源代码 通用串口通讯,C51程序源代码 -Universal Serial communications, C51 source code generic serial communications, C51 source code

基于51单片机，实现RS232和RS485两机通信，包含详细说明！

ah 209型通用读卡器驱动程序源码，ic卡，光电卡，隐形光电卡通用读卡器程序-ah 209-based driver-source general-purpose reader, ic card, photoelectric cards, stealth photoelectric reader program using cartoons

STC单片机IO口模拟RS232测试程序,Keil Cx51应用开发技术中的程序主要的功能是在利用串口调试工具发送一个8bit的数据，而后单片机接收后把这个数据发送给模拟串口-STC Single-chip analog IO port RS232 test procedures, Keil Cx51 technology application development process is essentially the function is in the use of serial debug tools send an 8bit data, and then after the single-chip receive the data sent to the simulation of serial

可以熟悉51单片机中断机制 大大方便学习51单片机-Be familiar with the 51 single-chip interrupt mechanism would greatly facilitate study of 51 single-chip microcomputer

可以进行单片机等电路仿真调试 可以进行单片机等电路仿真调试

基于DS1820温度传感器,单片机控制的单线多路温度检测-Based on the DS1820 temperature sensor, single-chip microcomputer-controlled one-way multi-channel temperature detection

用C语言编写的交通灯上的程序，这里只取出了读取8563的一段程序。-Using C language programs on the traffic lights, only one out of the reading section of procedures for 8563.

at89c5x系列的at89s53的芯片资料-at89c5x series chips at89s53 information