串口自动检测

1 button device with bascom avr

RS-232 通信调试程序，初学者适应。(RS-232 communications debugger, beginners to adapt.)

STRING MATHMATICAL PLEASE COMMENT

说明：  1 button device with bascom avr

用VB编写的FX系列PLC通信动态链接库,用户只需调用API函数就可以简单的实现串口通讯(VB prepared by the FX series PLC communication dynamic link library, Users only need to call API functions can be achieved by a simple serial communications)

一个新的通信协议,一线通协议模版软件,希望对大家开发有用()

VB写的串口通讯软件，简单易学，适合初学者(Written in VB serial communication software, is easy to learn)

vb 串口上位机 很简单的一个版本，大家自己扩展功能吧 (com executed on pc,it s a simple version ,easy for expansion)

说明：  Testing PC to DVP PLC connection

这个程序是利用VC编写的一个从机串口响应modbus查询命令程序，实现RTU方式，3.5和1.5个字符时间检测，CRC和LRC校验。(This program is written using VC as a response from the machine serial modbus query command procedure, to achieve RTU mode, 3.5 and 1.5 characters time detection, CRC and LRC check.)