Ak Modul-bus USB Devices Driver

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Summary

Guidelines for choosing the right programming model
UWP app and desktop app developer experience

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Important APIs

This topic provides guidelines for deciding whether you should write a UWP app or a Windows desktop app to communicate with a USB device.

Windows provides API sets that you can use to write apps that talk to a custom USB devices. The API performs common USB-related tasks such as, finding the device, data transfers.

'Custom device' in this context means, a device for which Microsoft does not provide an in-box class driver. Instead, you can install WinUSB (Winusb.sys) as the device driver.

Choosing a programming model

Ak Modul-bus USB Devices Driver

If you install Winusb.sys, here are the programming model options:

Windows 8.1 provides a new namespace: Windows.Devices.Usb. The namespace cannot be used in earlier version of Windows. Other Microsoft Store resources are here: UWP app.
Before Windows 8.1, apps that were communicating through Winusb.sys, were desktop apps written by using WinUSB Functions. In Windows 8.1, the API set has been extended. Other Windows desktop app resources are here: Windows desktop app.

The strategy for choosing the best programming model depends on various factors.

Ak Modul-bus Usb Devices Driver Adapter

Will your app communicate with an internal USB device?
The APIs are primarily designed for accessing peripheral devices. The API can also access PC internal USB devices. However access to PC internal USB devices from a UWP app is limited to a privileged app that is explicitly declared in device metadata by the OEM for that PC.
Will your app communicate with USB isochronous endpoints?
If your app transmits data to or from isochronous endpoints of the device, you must write a Windows desktop app. In Windows 8.1, new WinUSB Functions have been added to the API set that allow a desktop app to send data to and receive data from isochronous endpoints.
Is your app a 'control panel' type of app?
UWP apps are per-user apps and do not have the ability to make changes outside the scope of each app. For these types of apps, you must write a Windows desktop app.
Is the USB device class supported classes by UWP apps?
Write a UWP app if your device belongs to one these device classes.
- name:cdcControl, classId:02 * *
- name:physical, classId:05 * *
- name:personalHealthcare, classId:0f 00 00
- name:activeSync, classId:ef 01 01
- name:palmSync, classId:ef 01 02
- name:deviceFirmwareUpdate, classId:fe 01 01
- name:irda, classId:fe 02 00
- name:measurement, classId:fe 03 *
- name:vendorSpecific, classId:ff * *
Note If your device belongs to DeviceFirmwareUpdate class, your app must be a privileged app.

If your device does not belong to one the preceding device classes, write a Windows desktop app.

Driver requirement

Driver requirement	UWP app	Windows desktop app
Function driver	Microsoft-provided Winusb.sys (kernel-mode driver).	Microsoft-provided Winusb.sys (kernel-mode driver).
Filter driver	If filter drivers are present, access is limited to privileged apps. The app is declared as privileged apps in device metadata by the OEM.	Filter driver can be present in the kernel mode device stack as long as it doesn't block access to Winusb.sys.

Code samples

Sample	UWP app	Windows desktop app
Get started with these samples	Start with the WinUsb Application template included with Microsoft Visual Studio (Ultimate or Professional) Extend the template by using code examples shown in How to Access a USB Device by Using WinUSB Functions.

Development tools

Ak Modul-bus USB Devices Driver

Ak modul-bus usb devices driver updater

Development tools

UWP app

Windows desktop app

Developer environment

Microsoft Visual Studio 2013

Microsoft Windows Software Development Kit (SDK) for Windows 8.1

Use WinUSB Application template included with Visual Studio (Ultimate or Professional) and Windows Driver Kit (WDK) 8

Note For isochronous transfers, Visual Studio 2013 with Windows Driver Kit (WDK) 8.1

Programming languages

C#, VB.NET, C++, JavaScript

C/C++

Feature implementation

Key scenario	UWP app	Windows desktop app
Device discovery	Use Windows.Devices.Enumeration](/uwp/api/Windows.Devices.Enumeration)'>Windows.Devices.Enumeration namespace to get a UsbDevice](/uwp/api/Windows.Devices.Usb.UsbDevice)'>UsbDevice.	Use SetupAPI functions and WinUsb_Initialize](/windows/win32/api/winusb/nf-winusb-winusb_initialize)'>WinUsb_Initialize to get a WINUSB_INTERFACE_HANDLE.
USB control transfer
Getting USB descriptors	WinUsb_GetDescriptor](/windows/win32/api/winusb/nf-winusb-winusb_getdescriptor)'>WinUsb_GetDescriptor
Sending USB bulk transfer
Sending USB interrupt transfer
Sending USB isochronous transfer	Not supported.
Closing the device	UsbDevice.Close](/uwp/api/Windows.Devices.Usb.UsbDevice#Windows_Devices_Usb_UsbDevice_Close)'>UsbDevice.Close	WinUsb_Free](/windows/win32/api/winusb/nf-winusb-winusb_free)'>WinUsb_Free

Documentation

Documentation	UWP app	Windows desktop app
Programming guide	Talking to USB devices, start to finish	How to Access a USB Device by Using WinUSB Functions
API reference	Windows.Devices.Usb	WinUSB Functions

Related topics

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