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embedded-trainings-2020/embedded-workshop-book/src/configuration-descriptor.md
Jorge Aparicio 6f4b7a922d split long section
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Configuration descriptor

TODO

The configuration descriptor describes one of the device configurations to the host. The descriptor contains the following information about a particular configuration:

  • the total length of the configuration: this is the number of bytes required to transfer this configuration descriptor and the interface and endpoint descriptors associated to it
  • its number of interfaces -- must be >= 1
  • its configuration value -- this is not an index and can be any non-zero value
  • whether the configuration is self-powered
  • whether the configuration supports remote wakeup
  • its maximum power consumption

The full format of the configuration descriptor is specified in section 9.6.3, Configuration, of the USB specification.