- #Install usb virtual port inf how to#
- #Install usb virtual port inf serial numbers#
- #Install usb virtual port inf serial number#
- #Install usb virtual port inf install#
This file contains a Support Note and installation program. In the Downloads section, download the file called Windows7 USB Installer to your computer.
#Install usb virtual port inf install#
The simplest way to install the virtual serial port for the USB interface to the receiver is to go to the Trimble Support website ( and search for the AG-342 receiver.
In the Downloads section, download the file called Windows7 USB Installer to your computer or USB drive.
The simplest way to install the Virtual Serial port for the USB interface to the SPS receivers is to go to the Trimble Support website ( and search for the SPS GNSS receiver you have. The receiver must be running firmware version 4.15 or later. The other end of the USB cable then connects to a computer. The SPS985 smart antenna has USB cable P/N 80751‐HH that can be connected to the receiver. The SPS modular receivers have a number of USB cables to use. It is possible to use the USB interface from a Trimble AG-342 receiver with a software application that requires a serial port.įor example, the Trimble WinFlash utility can be run on a computer that has no physical serial port by connecting the USB cable between the computer and the receiver.Īnother example would allow the receiver to stream NMEA messages over a USB interface into a computer's virtual serial port, allowing applications such as HYDROpro™ construction software to use the NMEA messages on a computer that has no physical serial ports. It is possible to use the USB interface from an SPS GNSS receiver with a software application that requires a serial port. And not like HID device, there is no signed INF file from Microsoft.Getting Started Guides > SPS985 > Activation > Configuring a PC USB port as a virtual serial port Configuring a PC USB port as a virtual serial port The major problem is that usbser.sys has serious drawbacks. Perhaps CDC is better supported in Vista?ġ) The following thread and the links provide the answers to your question.Ģ) The above links provide some insite as well. In fact, I was under the impression that if the OS provides a signed INF file for the class then that INF will be used occording to the default rules even if the OEM provides a signed device specific INF.
#Install usb virtual port inf how to#
But it is done by adding an additional string descriptor and refering to it from the device descriptor.īenjamin: Could you elaborate on your method? I know how to use SetupAPI to find a list of devices with a PID/VID, but I'm not sure how to retrieve the actual COM port from the registry once I get the device name out of SetupAPI.ĭarioG: I thought the whole point of USB class devices was so that no driver or INF needs to be installed at all.
#Install usb virtual port inf serial number#
This variable works for XP, not sure about 2K and others.īTW, I am using CCS compiler and USB code, so I can't offer specific instractions for configuring the serial number with the Microchip code. (Do this from Control Panel > System > Advanced > Environment Variables). The catch is that this doesn't work unless you first define the following system environment variable 'devmgr_show_nonpresent_devices' with value '1'. If you want to see all assignments, you should select 'View > Show Hidden Devices' from the device manager's menu.
It will only be visible here whilst the device is plugged in. just look it up in the device manager under 'Ports (COM & LPT)'.
#Install usb virtual port inf serial numbers#
Just remember that serial numbers must be unique for every instance of the device you make.Īs for determining which COM port Windows has assigned. BUT, for a given USB port, once registered, the COM port remains the same, unless you explicitly uninstall the device. Without the serial number, windows assigns a different COM port for each USB port you plug it into. This means the COM port remains the same. From then on, the device is recognised as the same device regardless of which USB port it is plugged into. The first time the device is connected, windows registers the new hardware and a COM port is assigned. I use the CDC with an 18F2455, with serial number defined, under XP and 2K.
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