Appendix D. USB Messaging System Messages

Appendix D. USB Messaging System Messages
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Table of Contents

D.1. Hub Message Class
D.2. Power Capacity Class
D.3. New Device Class
D.4. Configuration Class
D.5. Claim Interface Class
D.6. Pipe Class
D.7. Capacity Class
D.8. Controller Message Class
D.9. Log control Class

The USB Chapter 8, USB Message System has several messages, these are divided into message classes. Each class is presented here as a separate section with the messages for that class presented in each sub-section. The list of messages presented here may not always be completely up to date and the reader is encouraged to check the Section 2.8, “msg.h” header.

Table D.1. Message Classes

Value	Class
0	hub
1	powercap (power capacity)
2	new device
3	configuration change
4	claim interface
5	pipe exclusive claim
6	capacity check / claim
7	controller message
8	log control message