I have a fingerprint sensor that's connected to my computer via a USB to TTL module containing a Silicon Labs CP2102 chip. What's the best way to integrate a COM port connection into the Windows Biometric Framework? The sample USB driver UMDF code is rather useless to me at the moment.
Also, can I load an unsigned or uncertified driver to test Windows Hello for my sensor?
Related
I am working on a project that involve accessing USB port using browser.I have seen WebUSB API and WebSerial API. Though I can't seem to get what is the difference between them? Can someone highlight the difference?
The difference between the two APIs is how they interface with the operating system to communicate with the device. WebUSB uses the platform-specific USB API while Web Serial uses the platform-specific serial API. This matters because USB is lower level than serial and because not every serial device is a USB device. With WebUSB you will be able to communicate with many different classes of USB device, including serial devices, but it requires the operating system allow the browser to "claim" the USB interface, which means there can't already be a USB device driver present. With Web Serial you will be able to communicate with USB serial devices, but also other types of serial devices such as Bluetooth as well as built-in RS-232 ports and other UARTs. The tradeoff you make with using Web Serial to connect to a USB device is that the operating system needs to have the correct USB serial driver installed so that the device is available through the platform-specific serial API used by the browser to implement Web Serial.
WebUSB API is for providing access to USB (Universal Serial Bus) devices from web, But WebSerial API is for providing access to serial ports complying with RS232 standards from web, like old printers port or old mouse port. RS232 is used on many devices like medical devices.
I made a custom USB sensor device that runs on a Windows 8.1 / 10 desktop computer using the WinUSB driver (I implemented Microsoft extended USB descriptors in device firmware to automatically install the driver when the device connected).
Can I use a WinUSB device on HoloLens2? Or, if there is no WinUSB support on HoloLens2, how can I use my USB device with a “custom USB device class”?
At the moment, I do not have a hololens2, but I need to understand how the USB works on it.
Edit: I found this link: https://learn.microsoft.com/en-us/hololens/hololens-connect-devices#hololens-2-connect-usb-c-devices
It says that hololens2 supports the following device classes:
Mass storage devices (such as thumb drives)
Ethernet adapters (including ethernet plus charging)
USB-C-to-3.5mm digital audio adapters
USB-C digital audio headsets (including headset adapters plus charging)
Wired mouse
Wired keyboard
Combination PD hubs (USB A plus PD charging)
My device does not implement any of these classes (custom class). Is there a chance to make it work on hololens2?
I finally tested my code and USB device on real Hololens 2. The USB device works great there because Hololens2 supports WinUSB! The WinUSB driver was installed automatically (my device has WinUSB descriptors).
According to the documentation you referred, all classes HoloLens2 supports have been listed, and unlisted classes are not supported.
Could you provide more information about your business request and submit a feature request via feedback hub on new feature request to be considered in future releases of HoloLens OS and devices?
If it’s a hot impacted feature, it will be possible to be given priority to jump in the development schedule. Actually, the existing classed on HoloLens 2 are also based on user’s feedback in such way.
For how to post feedback request, you can follow this doc: Send feedback to Microsoft with the Feedback Hub app.
I have Raspberry Pi 3 plate with connected USB to UART (COM) converter.
The power led on the USB stick is ON.
I can not find the converter in Windows Device Portal.
In both: connected and disconnected states I see just two UART related records in Device Manager:
(ID:ACPI\BCM2835\0, Class:System, Manufacturer:Microsoft, StatusCode:25165834)
>BCM283x Mini UART Serial Device
(ID:ACPI\BCM2836\0, Class:Ports, Manufacturer:Microsoft, StatusCode:25182218)
>ARM PL011 UART Device Driver
(ID:ACPI\BCM2837\4, Class:System, Manufacturer:Microsoft, StatusCode:25165834)
Also I use git diff between saved device lists and there is no difference between the case I connect USB stick and disconnect it.
Where can I see the device in the list?
UPDATE
Here I print all found devices:
First you need make sure your USB to UART (COM) converter is supported on Windows IoT Core. Please check the hardware compatibility list. The CP2102 USB 2.0 to TTL Module Serial Converter is supported.
I use CP2102 USB to UART Bridge Converter and it also works. Use the SerialUART sample can list two device: one is on-board PL011 UART Device and the other is mine.
From device portal:
When I plug a USB web Camera into a PC via USB, what communications is used? I know each device COULD have its own uniques driver, but it seems as though 99% use a common built in driver now. Where is it spec'd and how do you get a linux embedded device to act like a webcam?
What you're looking for is the USB Video Class and you can download the specification for this and other standard USB device classes here:
http://www.usb.org/developers/docs/devclass_docs/
The Linux USB gadget framework has code to emulate such a device:
https://github.com/torvalds/linux/blob/master/drivers/usb/gadget/function/f_uvc.c
I want to communicate to halios system(hardware) through usb port. I have a code which shows that the device is attached. I used USBTrace which shows that how many bytes are going in and out from the device to the host. But I do not know how to implement this is vc++2008 and by using windows xp.
If this is an evaluation board for an Elmos optical sensor IC I would guess that a USB to serial converter is involved. You could confirm this by watching Windows Device Manager for a new COM port appearing when you attach the device.
If that's the case you can use Basic example of serial communication with Windows XP/win32 but you may need to contact Elmos for the command protocol.