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Standard USB descriptors - Windows drivers | Microsoft …
https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/standard-usb-descriptors
USB endpoint descriptor. Each endpoint, in an interface, describes a single stream of input or output for the device. A device that supports streams for different kinds of functions has multiple interfaces. A device that supports …
embedded - USB Audio Descriptor - Stack Overflow
https://stackoverflow.com/questions/23519753/usb-audio-descriptor
USB descriptors, block of code: ROM BYTE configDescriptor1 [] = { //CD 0x09, // Size : 9 Bytes 0x02, // Configuration Descriptor (0x02) //0xE4, // Total length in bytes of data returned Includes the combined length of all descriptors (configuration, interface, endpoint, and class- or vendor-specific) returned for this configuration. 0xB4 ...
USB Audio 2.0 Drivers - Windows drivers | Microsoft Docs
https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/usb-2-0-audio-drivers
An AS interface descriptor must start with alternate setting zero with no endpoint (no bandwidth consumption) and further alternate settings must be specified in ascending order in compatible USB Audio 2.0 hardware. An alternate setting with a format that is not supported by the driver will be ignored.
USB Audio and Composite Devices
https://chamod.net/USB-Audio-and-Composite-Devices/
Alternate Setting 0 - This is a standard interface descriptor. with the AUDIO Class and AUDIO_STREAMING Subclass. There’s no further descriptors for this interface. Alternate Setting 1 - This one bears the same fields as the previous one, with the exception of bNumEndpoints which is set to 1. Since this alternate setting has an endpoint that is used for …
AN295: USB Audio Class Tutorial - Silicon Labs
https://www.silabs.com/documents/public/application-notes/AN295.pdf
The descriptors configure Endpoint 3 to be the Audio Class’s isochronous endpoint. The USB Interrupt Service Routine ISR will vector to the Endpoint 3 handler when it receives a token packet from the host requesting a transfer with that endpoint. The contents of this handler are highly system specific, but will most likely perform one
Endpoint Descriptor - Keil
https://www.keil.com/pack/doc/mw/USB/html/_u_s_b__endpoint__descriptor.html
USB in a NutShell - Chapter 5 - USB Descriptors
https://beyondlogic.org/usbnutshell/usb5.shtml
Each endpoint descriptor is used to specify the type of transfer, direction, polling interval and maximum packet size for each endpoint. Endpoint zero, the default control endpoint is always assumed to be a control endpoint and as such never has a descriptor. Composition of USB Descriptors. All descriptors are made up of a common format.
EndpointDescriptor (usb4java 1.3.0 API)
http://usb4java.org/apidocs/org/usb4java/EndpointDescriptor.html
EndpointDescriptor (usb4java 1.3.0 API) java.lang.Object. org.usb4java.EndpointDescriptor. public final class EndpointDescriptor extends Object. A structure representing the standard USB endpoint descriptor. This descriptor is documented in section 9.6.6 of the USB 3.0 specification. All multiple-byte fields are represented in host-endian format.
USB in a NutShell - Chapter 4 - Endpoint Types
https://beyondlogic.org/usbnutshell/usb4.shtml
The Address field will hold the address of the device the host is requesting the descriptor from. The endpoint number should be zero, specifying the default pipe. The host will then send a DATA0 packet. This will have an 8 byte payload which is the Device Descriptor Request as outlined in Chapter 9 of the USB Specification. The USB function then …
Universal Serial Bus Device Class Definition for Audio …
https://www.usb.org/sites/default/files/audio10.pdf
USB Device Class Definition for Audio Devices Release 1.0 March 18, 1998 ii Scope of This Release This document is the 1.0 release of this device class definition.
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