Initial RGB LED decoder

Signed-off-by: Matt Ranostay <mranostay@gmail.com>

2 files changed, 98 insertions, 0 deletions

diff --git a/decoders/rgb_led/__init__.py b/decoders/rgb_led/__init__.py
new file mode 100644
index 0000000..e08adbe
--- /dev/null
+++ b/decoders/rgb_led/__init__.py
@@ -0,0 +1,26 @@
+##
+## This file is part of the libsigrokdecode project.
+##
+## Copyright (C) 2014 Matt Ranostay <mranostay@gmail.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 protocol decoder can decode generic RGB LED string values that are
+clocked over SPI in RGB values.
+'''
+
+from .pd import *
diff --git a/decoders/rgb_led/pd.py b/decoders/rgb_led/pd.py
new file mode 100644
index 0000000..38bd64d
--- /dev/null
+++ b/decoders/rgb_led/pd.py
@@ -0,0 +1,72 @@
+##
+## This file is part of the libsigrokdecode project.
+##
+## Copyright (C) 2014 Matt Ranostay <mranostay@gmail.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
+##
+
+import sigrokdecode as srd
+
+class Decoder(srd.Decoder):
+    api_version =1
+    id = 'rgb_led'
+    name = 'RGB LED (SPI mode)'
+    longname = 'RGB LED string decoder (SPI mode)'
+    desc = ''
+    license = 'gplv2'
+    inputs = ['spi']
+    outputs = ['rgb_led']
+    probes = []
+    optional_probes = []
+    options = {}
+    annotations = [
+        ['text', 'Human-readable text'],
+        ['warnings', 'Human-readable warnings'],
+    ]
+
+    def __init__(self, **kwargs):
+        self.cmd_ss, self.cmd_es = 0, 0
+        self.mosi_bytes = []
+
+    def start(self):
+        self.out_ann = self.register(srd.OUTPUT_ANN)
+
+    def putx(self, data):
+        self.put(self.cmd_ss, self.cmd_es, self.out_ann, data)
+
+    def decode(self, ss, es, data):
+        ptype, mosi, miso = data
+
+        # Only care about data packets
+        if ptype != 'DATA':
+            return
+        self.ss, self.es = ss, es
+
+        if len(self.mosi_bytes) == 0:
+            self.cmd_ss = ss
+        self.mosi_bytes.append(mosi)
+
+        # RGB value == 3 bytes
+        if len(self.mosi_bytes) != 3:
+            return
+
+        red, green, blue =  self.mosi_bytes
+        rgb_value  = int(red) << 16
+        rgb_value |= int(green) << 8
+        rgb_value |= int(blue)
+
+        self.putx([0, ["#%.6x" % rgb_value]])
+        self.mosi_bytes = []