mirror of
https://github.com/gusmanb/logicanalyzer.git
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73 lines
2.2 KiB
Python
73 lines
2.2 KiB
Python
##
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## This file is part of the libsigrokdecode project.
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##
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## Copyright (C) 2014 Matt Ranostay <mranostay@gmail.com>
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, see <http://www.gnu.org/licenses/>.
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##
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import sigrokdecode as srd
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( ANN_RGB, ) = range(1)
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class Decoder(srd.Decoder):
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api_version = 3
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id = 'rgb_led_spi'
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name = 'RGB LED (SPI)'
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longname = 'RGB LED string decoder (SPI)'
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desc = 'RGB LED string protocol (RGB values clocked over SPI).'
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license = 'gplv2+'
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inputs = ['spi']
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outputs = []
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tags = ['Display']
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annotations = (
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('rgb', 'RGB value'),
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)
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def __init__(self):
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self.reset()
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def reset(self):
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self.ss_cmd = None
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self.mosi_bytes = []
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def start(self):
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self.out_ann = self.register(srd.OUTPUT_ANN)
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def putg(self, ss, es, cls, text):
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self.put(ss, es, self.out_ann, [cls, text])
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def decode(self, ss, es, data):
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ptype = data[0]
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# Grab the payload of three DATA packets. These hold the
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# RGB values (in this very order).
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if ptype != 'DATA':
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return
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_, mosi, _ = data
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if not self.mosi_bytes:
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self.ss_cmd = ss
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self.mosi_bytes.append(mosi)
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if len(self.mosi_bytes) < 3:
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return
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# Emit annotations. Invalidate accumulated details as soon as
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# they were processed, to prepare the next iteration.
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ss_cmd, es_cmd = self.ss_cmd, es
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self.ss_cmd = None
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red, green, blue = self.mosi_bytes[:3]
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self.mosi_bytes.clear()
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rgb_value = int(red) << 16 | int(green) << 8 | int(blue)
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self.putg(ss_cmd, es_cmd, ANN_RGB, ['#{:06x}'.format(rgb_value)])
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