swd: Add SWD protocol decoder for ARM Serial Wire Debug format.

Supports annotated output for analysing debug sessions, Python output
for potential stacked decoders looking at higher level debug
operations.

1 files changed, 35 insertions, 0 deletions

diff --git a/decoders/swd/__init__.py b/decoders/swd/__init__.py
new file mode 100644
index 0000000..e6da908
--- /dev/null
+++ b/decoders/swd/__init__.py
@@ -0,0 +1,35 @@
+##
+## This file is part of the libsigrokdecode project.
+##
+## Copyright (C) 2014 Angus Gratton <gus@projectgus.com>
+##
+## 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
+##
+
+'''
+This PD decodes the ARM SWD (version 1) protocol, as described in the
+"ARM Debug Interface v5.2" Architecture Specification.
+
+Details:
+http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ihi0031c/index.html
+(Registration required)
+
+Not supported:
+ * Turnaround periods other than the default 1, as set in DLCR.TURNROUND
+   (should be trivial to add)
+ * SWD protocol version 2 (multi-drop support, etc.)
+'''
+
+from .pd import *