arc/notes
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

vault backup: 2025-08-03 13:51:48

Browse Source
This commit is contained in:
arc
2025-08-03 13:51:48 -06:00
parent 6961bd948b
commit 593b44d260
1 changed files with 2 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
notes/USB.md
View File

@ -24,5 +24,6 @@ Most bus transactions involve the transmission of up to three packets.
The USB data transfer model between a source or destination on the host and an endpoint on a device is referred to as a *pipe*. There are two types of pipes: stream, and message. Stream data has no USB defined structure, while message data is structured. Each pipe is associated with a bandwidth, transfer service, and endpoint characteristics like directionality and buffer size. The USB data transfer model between a source or destination on the host and an endpoint on a device is referred to as a *pipe*. There are two types of pipes: stream, and message. Stream data has no USB defined structure, while message data is structured. Each pipe is associated with a bandwidth, transfer service, and endpoint characteristics like directionality and buffer size.
One message pipe, the Default Control Pipe, always exists One message pipe, the Default Control Pipe, always exists when a USB device is configured in order to provide access to the device's configuration, status, and control info.
For more, see the USB 2.0 specification section 4.4.