从COM端口读取数据

Question

I want to get input from a barcode-scanner, which is connected to a CHD cash register, which is connected to a Windows XP PC trough a COM port. I want to read the data from the scanner and the cash register, and send the data to a program, which has a table with items in a shop. And provide a function which removes items, too.

Where should I start? Is there a code in Delphi or Java, that can get that data into a program?

Answer 1

@Demonick, most barcode scanners work is simply as a keyboard interrupt. you need just set the focus of an text control (like an TEdit or TMemo ) an will receive the barcode as if it was typed using the keyboard.

Anyway if you need access the com port using delphi you can use the TurboPower Async library or the ComPort Library .

Answer 2

我喜欢TComPort，但是如果您喜欢编写自己的代码，则也可以使用ReadFile。

Answer 3

There's also comport library from Synapse project: Synaser . I haven't used Synaser, but I have good experiences with Synapse and Synaser should be pretty similar.