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USB Power Delivery protocol
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This directory contains captures of data communication on the Control Channels
of Type-C USB connectors using the USB Power Delivery protocol.

Details:
http://www.usb.org/developers/powerdelivery/


Logic analyzer setup
--------------------

A 'Twinkie' USB type-C interposer was used to capture the communication
on the CCx pins:

  Probe      Signal
  -----------------
  CC1        Control Channel 1
  CC2        Control Channel 2

The type-C connectors are reversible, so the actual communication might
happen on CC1 or CC2 depending the polarity of the plug inside the receptacle.

Data
----

Captured Between a Google Pixel 2015 laptop and both its 5V/12/V/20V power
supply and an USB-C to HDMI video dongle.

The sigrok command lines used were:

  sigrok-cli -d chromium-twinkie --continuous -o power_supply_20V.sr 
  sigrok-cli -d chromium-twinkie --continuous -o hdmi_dongle.sr