modbus通信协议中文版，详细介绍了modbus协议，LRC校验，CRC校验等，并给出了C语言例程代码。...

TTL串入并出口74hc164资料 。希望可以用-TTL string into and exported 74hc164 information. Wanted to use

电话秘书.-telephone Secretary. Good g ood g ood g ood g ood g ood g ood g ood g ood g ood g ood g ood g ood g ood

串口编程调试精灵 希望对各位有用-hope that the Wizard useful to you!

c8051F221的SPI总线通信(收)-c8051F221 SPI Bus Communication (received)

串口程序，使用vc编写，好东西，大家可以分享一下。-Serial procedures, the use of vc preparation, good things, we can share.

很好的东东,有详细的文档介绍，适合于串口通信的初学者。-good Dongdong, a detailed document, suitable for serial communication beginners.

自己编写的关于火车列尾风压控制的程序,涉及串口,数据库等相关内容-I have written out on the train tail wind pressure control procedures, involving serial, database and other related content

vc实现的一个串口通讯例子-vc achieve an example of serial communications

max3100的应用 MAX3100在串行红外数据与RS―232转换器中的应用-MAX3100 Application max3100 infrared data in the serial RS-232 Converter

使用RS232串口2，通过Copley电机控制卡控制电机运转的VB程序。文件夹中包含有程序开发手册。 Using RS232 2 port, a VB program is developed for Copley motor control card, by which motors can move precisely. A handbook for program develpoment is involved in the rar file.-The use of RS232 serial port 2, through Copley cards to control motor control motor running VB program. Folder contains a program development manual. Using RS232 2 port, a VB program is developed for Copley motor control card, by which motors can move precisely. A handbook for program develpoment is involved in the rar file.