usb_power_delivery: Add USB PD dumps

[sigrok-dumps.git] / usb_power_delivery / pixel_2015 / README

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+-------------------------------------------------------------------------------
+USB Power Delivery protocol
+-------------------------------------------------------------------------------
+
+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
+