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1 | ## |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2018 Stefan Brüns <stefan.bruens@rwth-aachen.de> | |
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, see <http://www.gnu.org/licenses/>. | |
18 | ## | |
19 | ||
20 | import sigrokdecode as srd | |
21 | ||
22 | class Decoder(srd.Decoder): | |
23 | api_version = 3 | |
24 | id = 'counter' | |
25 | name = 'Counter' | |
26 | longname = 'Edge counter' | |
27 | desc = 'Count number of edges.' | |
28 | license = 'gplv2+' | |
29 | inputs = ['logic'] | |
30 | outputs = [] | |
31 | channels = ( | |
32 | {'id': 'data', 'name': 'Data', 'desc': 'Data line'}, | |
33 | ) | |
34 | optional_channels = ( | |
35 | {'id': 'reset', 'name': 'Reset', 'desc': 'Reset line'}, | |
36 | ) | |
37 | annotations = ( | |
38 | ('edge_count', 'Edge count'), | |
39 | ('word_count', 'Word count'), | |
42dcd8ef | 40 | ('word_reset', 'Word reset'), |
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41 | ) |
42 | annotation_rows = ( | |
43 | ('edge_counts', 'Edges', (0,)), | |
44 | ('word_counts', 'Words', (1,)), | |
42dcd8ef | 45 | ('word_resets', 'Word resets', (2,)), |
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46 | ) |
47 | options = ( | |
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48 | {'id': 'data_edge', 'desc': 'Edges to count (data)', 'default': 'any', |
49 | 'values': ('any', 'rising', 'falling')}, | |
6ca7aa50 | 50 | {'id': 'divider', 'desc': 'Count divider (word width)', 'default': 0}, |
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51 | {'id': 'reset_edge', 'desc': 'Edge which clears counters (reset)', |
52 | 'default': 'falling', 'values': ('rising', 'falling')}, | |
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53 | ) |
54 | ||
55 | def __init__(self): | |
56 | self.reset() | |
57 | ||
58 | def reset(self): | |
59 | self.edge_count = 0 | |
60 | self.word_count = 0 | |
61 | self.have_reset = None | |
62 | ||
63 | def metadata(self, key, value): | |
64 | if key == srd.SRD_CONF_SAMPLERATE: | |
65 | self.samplerate = value | |
66 | ||
67 | def start(self): | |
68 | self.out_ann = self.register(srd.OUTPUT_ANN) | |
e8b53818 | 69 | self.edge = self.options['data_edge'] |
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70 | self.divider = self.options['divider'] |
71 | if self.divider < 0: | |
72 | self.divider = 0 | |
73 | ||
42dcd8ef UH |
74 | def putc(self, cls, annlist): |
75 | self.put(self.samplenum, self.samplenum, self.out_ann, [cls, annlist]) | |
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76 | |
77 | def decode(self): | |
78 | condition = [{'rising': {0: 'r'}, | |
79 | 'falling': {0: 'f'}, | |
80 | 'any': {0: 'e'},}[self.edge]] | |
81 | ||
82 | if self.has_channel(1): | |
83 | self.have_reset = True | |
e8b53818 | 84 | condition.append({1: self.options['reset_edge'][0]}) |
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85 | |
86 | while True: | |
87 | self.wait(condition) | |
88 | if self.have_reset and self.matched[1]: | |
89 | self.edge_count = 0 | |
90 | self.word_count = 0 | |
42dcd8ef | 91 | self.putc(2, ['Word reset', 'Reset', 'Rst', 'R']) |
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92 | continue |
93 | ||
94 | self.edge_count += 1 | |
95 | ||
42dcd8ef | 96 | self.putc(0, [str(self.edge_count)]) |
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97 | if self.divider > 0 and (self.edge_count % self.divider) == 0: |
98 | self.word_count += 1 | |
42dcd8ef | 99 | self.putc(1, [str(self.word_count)]) |