srd: Move all protocol docs to __init__.py files.

[libsigrokdecode.git] / decoders / usb / usb.py

diff --git a/decoders/usb/usb.py b/decoders/usb/usb.py
index b209aa3186fbf9f2ba4feffa63bdd0ca74cd03db..99dd4b5addba0225441bbe84207a4ffe2cd83bdf 100644 (file)
--- a/decoders/usb/usb.py
+++ b/decoders/usb/usb.py
@@ -18,27 +18,7 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 ##
 
-#
-# USB Full-speed protocol decoder
-#
-# Full-speed USB signalling consists of two signal lines, both driven at 3.3V
-# logic levels. The signals are DP (D+) and DM (D-), and normally operate in
-# differential mode.
-# The state where DP=1,DM=0 is J, the state DP=0,DM=1 is K.
-# A state SE0 is defined where DP=DM=0. This common mode signal is used to
-# signal a reset or end of packet.
-#
-# Data transmitted on the USB is encoded with NRZI. A transition from J to K
-# or vice-versa indicates a logic 0, while no transition indicates a logic 1.
-# If 6 ones are transmitted consecutively, a zero is inserted to force a
-# transition. This is known as bit stuffing. Data is transferred at a rate
-# of 12Mbit/s. The SE0 transmitted to signal an end-of-packet is two bit
-# intervals long.
-#
-# Details:
-# https://en.wikipedia.org/wiki/USB
-# http://www.usb.org/developers/docs/
-#
+# USB (full-speed) protocol decoder
 
 import sigrokdecode as srd