If it's not a bug in the Windows driver, then I'm guessing it might be either a setting in the USB device descriptors or configuration, or a bug in the USB stack on the STM32. I'm thinking it must be something to do with the device capabilities (what Windows thinks the capabilities of the com port is, and what Windows thinks I am allowed or not allowed to set). I've looked at all the values set in the `DCB` structure and they all look ok. The error code is `87` which is an INVALID PARAMETER. I connects and enumerates on Win7, Win 10 and Mac, but only Win7 and Mac can open the device as a serial port (COM port).ĭebugging this I found that the low level windows API to `SetCommState()` was returning `false` on Windows 10 (it must return True on Windows 7 as it opens the port ok). A proprietary STM32F4 board using onbard USB. Under Categories > Middleware, select USB_DEVICE.I have this problem too. You should see PA11 and PA12 be automatically configured for USB_DM and USB_DP. In the Pinout & Configuration tab, go to Categories > Connectivity and click USB. We recently discovered after a Windows 10 Update, that Virtual COM Port drivers may not load any-longer by default for some devices. Unable to Mount Virtual COM Port in Windows 10 If you are using Windows 10 (or any other operating system) and having problems getting a Virtual COM Port to be assigned to your system, follow these steps. The USBIP/VHCI driver was installed properly: Here is a log from the usbip.exe: Why is Windows 10 unable to mount virtual COM port? I am trying to emulate the STMicroelectronics Virtual Com Port via the usbip vhci. Sign in to your account Virtual Com port fail. Is there a code for virtual COM port fail? inf file and may be edited with a text editor. It comes from the STM32 VCP Windows driver’s. After selecting the port names, simply click the “Add Pair” button and you are done! Where does STM32 virtual COM port description in Windows device?Īctually, the string “STMicroelectronics Virtual COM Port” does not come from the device descriptor loaded onto the STM32. Here you can select ports from the drop-down menu or manually enter custom port names. Step-by-step guide to add virtual COM port Windows 10: Launch the application and navigate to the “Manage Ports” tab. How do I create a virtual COM port in Windows 10? > What is a native inbox driver and where do I find it? In Microsoft slang, inbox driver means it is part of Windows installation and Just Works.
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