srd: Rename onewire_transport to maxim_ds28ea00.

[libsigrokdecode.git] / decoders / maxim_ds28ea00 / __init__.py

diff --git a/decoders/maxim_ds28ea00/__init__.py b/decoders/maxim_ds28ea00/__init__.py
new file mode 100644 (file)
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+++ b/decoders/maxim_ds28ea00/__init__.py
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+##
+## This file is part of the sigrok project.
+##
+## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+##
+
+'''
+1-Wire protocol decoder.
+
+The 1-Wire protocol enables bidirectional communication over a single wire (and
+ground) between a single master and one or multiple slaves. The protocol is
+layered.
+- Link layer (reset, presence detection, reading/writing bits)
+- Network layer (skip/search/match device ROM addresses)
+- Transport layer (transport data between 1-Wire master and device)
+
+Transport layer
+
+The transport layer is the largest and most complex part of the protocol, since
+it is very device specific. The decoder is parsing only a small part of the
+protocol.
+
+Annotations:
+The next link layer annotations are shown:
+- RESET/PRESENCE True/False
+  The event is marked from the signal negative edge to the end of the reset
+  high period. It is also reported if there are any devices attached to the
+  bus.
+The next network layer annotations are shown:
+- ROM val
+  The 64bit value of the addressed device is displayed:
+  family code (1B) + serial number (6B) + CRC (1B)
+- FUNCTION COMMAND val name
+  The requested FUNCTION command is displayed as an 8bit HEX value and by name.
+- DATA val
+  Data intended for the transport layer is displayed as an 8bit HEX value.
+
+TODO:
+- add CRC checks for transport layer
+'''
+
+from .maxim_ds28ea00 import *