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1 | ## | |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2014 Matt Ranostay <mranostay@gmail.com> | |
5 | ## | |
6 | ## This program is free software; you can redistribute it and/or modify | |
7 | ## it under the terms of the GNU General Public License as published by | |
8 | ## the Free Software Foundation; either version 2 of the License, or | |
9 | ## (at your option) any later version. | |
10 | ## | |
11 | ## This program is distributed in the hope that it will be useful, | |
12 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ## GNU General Public License for more details. | |
15 | ## | |
16 | ## You should have received a copy of the GNU General Public License | |
17 | ## along with this program; if not, write to the Free Software | |
18 | ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | ## | |
20 | ||
21 | import sigrokdecode as srd | |
22 | ||
23 | class Decoder(srd.Decoder): | |
24 | api_version = 2 | |
25 | id = 'rgb_led_spi' | |
26 | name = 'RGB LED (SPI)' | |
27 | longname = 'RGB LED string decoder (SPI)' | |
28 | desc = 'RGB LED string protocol (RGB values clocked over SPI).' | |
29 | license = 'gplv2' | |
30 | inputs = ['spi'] | |
31 | outputs = ['rgb_led_spi'] | |
32 | annotations = ( | |
33 | ('rgb', 'RGB values'), | |
34 | ) | |
35 | ||
36 | def __init__(self, **kwargs): | |
37 | self.ss_cmd, self.es_cmd = 0, 0 | |
38 | self.mosi_bytes = [] | |
39 | ||
40 | def start(self): | |
41 | self.out_ann = self.register(srd.OUTPUT_ANN) | |
42 | ||
43 | def putx(self, data): | |
44 | self.put(self.ss_cmd, self.es_cmd, self.out_ann, data) | |
45 | ||
46 | def decode(self, ss, es, data): | |
47 | ptype, mosi, miso = data | |
48 | ||
49 | # Only care about data packets. | |
50 | if ptype != 'DATA': | |
51 | return | |
52 | self.ss, self.es = ss, es | |
53 | ||
54 | if len(self.mosi_bytes) == 0: | |
55 | self.ss_cmd = ss | |
56 | self.mosi_bytes.append(mosi) | |
57 | ||
58 | # RGB value == 3 bytes | |
59 | if len(self.mosi_bytes) != 3: | |
60 | return | |
61 | ||
62 | red, green, blue = self.mosi_bytes | |
63 | rgb_value = int(red) << 16 | int(green) << 8 | int(blue) | |
64 | ||
65 | self.es_cmd = es | |
66 | self.putx([0, ['#%.6x' % rgb_value]]) | |
67 | self.mosi_bytes = [] |