Device Sample Format#

Data passed over the read or write streams are transmitted in unit packets, or “samples”.

Read Samples#

These are the samples produced by the devices and sent through the read stream to the controller. Read samples MUST have the following format:

uint64    hubclk_cnt
var       payload

  • hubclk_cnt: Hub Clock Counter. This is the common counter for all devices in a Hub, indicating the time of sample capture.

  • payload: Device-specific data. This data MUST be Read Sample Size - 8 bytes long.

Write samples#

These are the samples generated by the host and sent to the devices trough the write stream. Write samples MUST have the following format.

var payload