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d196b84b BO |
1 | ## |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2019 Benedikt Otto <benedikt_o@web.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 ChannelError(Exception): | |
23 | pass | |
24 | ||
93dd1225 GS |
25 | # This table is sorted by ASCII code numbers, with the exception |
26 | # of letters having their upper/lower case ignored. | |
27 | # | |
28 | # Traditional LED segment names and layout: | |
29 | # | |
30 | # A | |
31 | # F B | |
32 | # G | |
33 | # E C | |
34 | # D | |
35 | # | |
36 | # A B C D E F G | |
d196b84b BO |
37 | digits = { |
38 | (0, 0, 0, 0, 0, 0, 0): ' ', | |
853653aa BG |
39 | (0, 1, 0, 0, 0, 1, 0): '"', |
40 | (1, 1, 0, 1, 1, 1, 1): "&", | |
41 | (0, 0, 0, 0, 0, 1, 0): "'", | |
42 | (0, 1, 0, 0, 0, 0, 0): "'", | |
43 | (0, 0, 1, 1, 0, 0, 0): ',', | |
44 | (0, 0, 0, 0, 0, 0, 1): '-', | |
45 | (0, 0, 0, 0, 1, 0, 0): '.', | |
d196b84b BO |
46 | (1, 1, 1, 1, 1, 1, 0): '0', |
47 | (0, 1, 1, 0, 0, 0, 0): '1', | |
48 | (1, 1, 0, 1, 1, 0, 1): '2', | |
49 | (1, 1, 1, 1, 0, 0, 1): '3', | |
50 | (0, 1, 1, 0, 0, 1, 1): '4', | |
51 | (1, 0, 1, 1, 0, 1, 1): '5', | |
52 | (1, 0, 1, 1, 1, 1, 1): '6', | |
853653aa | 53 | (1, 1, 1, 0, 0, 1, 0): '7', |
d196b84b BO |
54 | (1, 1, 1, 0, 0, 0, 0): '7', |
55 | (1, 1, 1, 1, 1, 1, 1): '8', | |
56 | (1, 1, 1, 1, 0, 1, 1): '9', | |
853653aa BG |
57 | (1, 0, 0, 0, 0, 0, 1): '=', |
58 | (0, 0, 0, 1, 0, 0, 1): '=', | |
59 | (1, 1, 0, 0, 1, 0, 1): '?', | |
d196b84b | 60 | (1, 1, 1, 0, 1, 1, 1): 'A', |
853653aa BG |
61 | (1, 1, 1, 1, 1, 0, 1): 'a', |
62 | (0, 0, 1, 1, 1, 1, 1): 'b', | |
d196b84b | 63 | (1, 0, 0, 1, 1, 1, 0): 'C', |
853653aa BG |
64 | (0, 0, 0, 1, 1, 0, 1): 'c', |
65 | (0, 1, 1, 1, 1, 0, 1): 'd', | |
d196b84b BO |
66 | (1, 0, 0, 1, 1, 1, 1): 'E', |
67 | (1, 0, 0, 0, 1, 1, 1): 'F', | |
853653aa BG |
68 | (1, 0, 1, 1, 1, 1, 0): 'G', |
69 | (0, 1, 1, 0, 1, 1, 1): 'H', | |
70 | (0, 0, 1, 0, 1, 1, 1): 'h', | |
71 | (0, 0, 0, 0, 1, 1, 0): 'I', | |
72 | (1, 0, 0, 0, 1, 0, 0): 'i', | |
73 | (0, 0, 1, 0, 0, 0, 0): 'i', | |
74 | (0, 1, 1, 1, 1, 0, 0): 'J', | |
75 | (0, 1, 1, 1, 0, 0, 0): 'J', | |
76 | (1, 0, 1, 1, 0, 0, 0): 'j', | |
77 | (1, 0, 1, 0, 1, 1, 1): 'K', | |
78 | (0, 0 ,0, 1, 1, 1, 0): 'L', | |
79 | (1, 0, 1, 0, 1, 0, 0): 'M', | |
80 | (1, 0, 1, 0, 1, 0, 1): 'M', | |
81 | (1, 1, 1, 0, 1, 1, 0): 'N', | |
82 | (0, 0, 1, 0, 1, 0, 1): 'n', | |
83 | (0, 0, 1, 1, 1, 0, 1): 'o', | |
84 | (1, 1, 0, 0, 1, 1, 1): 'p', | |
85 | (1, 1, 1, 0, 0, 1, 1): 'q', | |
86 | (1, 1, 0, 0, 1, 1, 0): 'R', | |
87 | (0, 0, 0, 0, 1, 0, 1): 'r', | |
88 | (0, 0, 0, 1, 1, 1, 1): 't', | |
89 | (0, 0, 1, 1, 1, 0, 0): 'u', | |
90 | (0, 1, 0, 1, 0, 1, 0): 'V', | |
91 | (0, 1, 0, 0, 1, 1, 1): 'V', | |
92 | (0, 1, 1, 1, 1, 1, 0): 'V', | |
93 | (0, 1, 0, 0, 0, 1, 1): 'v', | |
94 | (0, 1, 0, 1, 0, 1, 1): 'W', | |
95 | (0, 0, 1, 0, 1, 0, 0): 'x', | |
96 | (0, 1, 1, 1, 0, 1, 1): 'y', | |
97 | (1, 1, 0, 1, 1, 0, 0): 'Z', | |
98 | (1, 1, 0, 0, 0, 1, 0): '^', | |
99 | (0, 0, 0, 1, 0, 0, 0): '_', | |
d196b84b BO |
100 | } |
101 | ||
102 | class Decoder(srd.Decoder): | |
103 | api_version = 3 | |
104 | id = 'seven_segment' | |
105 | name = '7-segment' | |
106 | longname = '7-segment display' | |
107 | desc = '7-segment display protocol.' | |
108 | license = 'gplv2+' | |
109 | inputs = ['logic'] | |
110 | outputs = [] | |
111 | tags = ['Display'] | |
112 | channels = ( | |
113 | {'id': 'a', 'name': 'A', 'desc': 'Segment A'}, | |
114 | {'id': 'b', 'name': 'B', 'desc': 'Segment B'}, | |
115 | {'id': 'c', 'name': 'C', 'desc': 'Segment C'}, | |
116 | {'id': 'd', 'name': 'D', 'desc': 'Segment D'}, | |
117 | {'id': 'e', 'name': 'E', 'desc': 'Segment E'}, | |
118 | {'id': 'f', 'name': 'F', 'desc': 'Segment F'}, | |
119 | {'id': 'g', 'name': 'G', 'desc': 'Segment G'}, | |
120 | ) | |
121 | optional_channels = ( | |
122 | {'id': 'dp', 'name': 'DP', 'desc': 'Decimal point'}, | |
123 | ) | |
124 | options = ( | |
125 | {'id': 'polarity', 'desc': 'Expected polarity', | |
126 | 'default': 'common-cathode', 'values': ('common-cathode', 'common-anode')}, | |
45d3b177 BG |
127 | {'id': 'show_unknown', 'desc': 'Display Unknown characters as #', |
128 | 'default': 'no', 'values': ('yes', 'no')}, | |
d196b84b BO |
129 | ) |
130 | annotations = ( | |
131 | ('decoded-digit', 'Decoded digit'), | |
132 | ) | |
133 | annotation_rows = ( | |
134 | ('decoded-digits', 'Decoded digits', (0,)), | |
135 | ) | |
136 | ||
137 | def __init__(self): | |
138 | self.reset() | |
139 | ||
140 | def reset(self): | |
141 | pass | |
142 | ||
143 | def start(self): | |
144 | self.out_ann = self.register(srd.OUTPUT_ANN) | |
145 | ||
146 | def putb(self, ss_block, es_block, data): | |
147 | self.put(ss_block, es_block, self.out_ann, data) | |
148 | ||
149 | def pins_to_hex(self, pins): | |
9e953ff1 | 150 | return digits.get(pins, None) |
d196b84b BO |
151 | |
152 | def decode(self): | |
153 | oldpins = self.wait() | |
154 | ||
155 | # Check if at least the 7 signals are present. | |
156 | if False in [p in (0, 1) for p in oldpins[:7]]: | |
157 | raise ChannelError('7 or 8 pins have to be present.') | |
158 | ||
159 | lastpos = self.samplenum | |
160 | ||
161 | self.have_dp = self.has_channel(7) | |
162 | ||
163 | conditions = [{0: 'e'}, {1: 'e'}, {2: 'e'}, {3: 'e'}, {4: 'e'}, {5: 'e'}, {6: 'e'}] | |
164 | ||
165 | if self.have_dp: | |
166 | conditions.append({7: 'e'}) | |
167 | ||
168 | while True: | |
169 | # Wait for any change. | |
170 | pins = self.wait(conditions) | |
171 | ||
172 | if self.options['polarity'] == 'common-anode': | |
173 | # Invert all data lines if a common anode display is used. | |
174 | if self.have_dp: | |
175 | oldpins = tuple((1 - state for state in oldpins)) | |
176 | else: | |
177 | oldpins = tuple((1 - state for state in oldpins[:7])) | |
178 | ||
179 | # Convert to character string. | |
180 | digit = self.pins_to_hex(oldpins[:7]) | |
181 | ||
45d3b177 BG |
182 | if digit is None and self.options['show_unknown'] == 'yes': |
183 | digit = '#' | |
184 | ||
d196b84b BO |
185 | if digit is not None: |
186 | dp = oldpins[7] | |
187 | ||
188 | # Check if decimal point is present and active. | |
9e953ff1 UH |
189 | if self.have_dp and dp == 1: |
190 | digit += '.' | |
d196b84b BO |
191 | |
192 | self.putb(lastpos, self.samplenum, [0, [digit]]) | |
193 | ||
194 | lastpos = self.samplenum | |
195 | ||
196 | oldpins = pins |