Virtual com port driver sample

Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Visit chat. Related Hot Network Questions. Stack Overflow works best with JavaScript enabled. It seems that you want a 'translater' to talk with a device, why not simply write a filter driver and implement some additional IOControls? If you really want to access an other port from within your driver which I already did once , you should look up following functions:.

A complete overview of control requests can be found here. Yes, you will need to write a virtual driver for this. If you don't have VS required for the 8. From the description:. The Null-modem emulator is an open source kernel-mode virtual serial port driver for Windows, available freely under GPL license. The Null-modem emulator allows you to create an unlimited number of virtual COM port pairs and use any pair to connect one COM port based application to another. The output to one port is the input from other port and vice versa.

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Thank you both for your replies. As to why I need a com port it's because the software that is being used with the hardware connects to a com port and my device drivers need to accommodate for that. The device doesn't have a com port or a serial device inside it but I need to make it seem like it does. The driver only executes something else when a recognised message is received. The com port is integral to the operation of the device but it isn't actually inside the device, sorry to say it that way.

Because I am so limited by the software being used I need a virtual com port and I can't find a way around it. Would it be impossible for me to create one as I have little to no knowledge about device drivers and I have only been looking into them for a month now? Friday, October 28, AM. For example, the utility lets two applications share data over virtual COM ports in such a manner that everything written by one program will immediately appear in the other one connected to the other end of the virtual serial port pair.

You can use the software for a variety of purposes, including:. For those of you who are looking for a simple way to create not only virtual COM port pairs but also their bundles with various custom parameters, the app developers offer the Virtual Serial Port Driver PRO version.

This edition is tailored for professional use by serial port software and hardware developers and testers. You can easily split a single real RS port into multiple virtual COM ones that will fully emulate the physical port. Virtual Serial Port Driver Pro makes it possible to create complex port bundles where multiple virtual and real serial ports can exchange the incoming data with all the other ports added to the bundle at a time.

Anytime your application needs to connect to a serial port, the switcher option will link it to a COM port being currently free. For this, you just create a bundle of virtual COM ports that will emulate a single real one. By communicating with one of the virtual ports, your app will, in fact, talk every time to the same real interface.