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Usb parallel adapter driver windows 7 code#
Usb parallel adapter driver windows 7 Pc#

This page suggests that there are indeed differences:Ĭontrary to all other USB parallel ports which can connect to printers only, this makes connection to most hardware.

Is there really a difference? Or can I just use one of these 5$ printer-adapters, plug in my own hardware and access the port from Delphi code? Or do I need a special adapter? Has anyone experience with this? There is a related question here, but the different adapter types (if existent) are not mentioned there. There seem to be differences between Parallel Port adapters which are made to connect just a printer and other adapters which seem to be more powerful. I am currently heading for and concentrating on the easiest and cheapest possibility: a USB to Parallel Port adapter.

Usb parallel adapter driver windows 7 Pc#

use a PCI Express card which adds a LPT port to the PC.

use a PCI card which adds a LPT port to the PC.

use a USB to Parallel Port adapter to add a LPT port to the PC.

Now the change: this needs to work on a machine which has no Parallel Port built-in (not even on the mainboard). What I now want to do - and where I need help I call something like PortOut, specify a port number and the byte value and the port is set. In Delphi I can use the io.dll to set the value of the Parallel Port, but there are also other solutions available, like inpout32.dll or port.dll.

Usb parallel adapter driver windows 7 code#

Source code is in Delphi, accessible and can be modified.

The target platforms are Windows XP to 7, all worked fine so far. This works without problems when using the built-in Parallel Port of a PC. It will set the Parallel Port output to a specified (byte) value. There is this program which uses the Parallel Port to synchronize with other hardware.