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1 | ## | |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2015 Jeremy Swanson <jeremy@rakocontrols.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, see <http://www.gnu.org/licenses/>. | |
18 | ## | |
19 | ||
20 | import sigrokdecode as srd | |
21 | from .lists import * | |
22 | ||
23 | class SamplerateError(Exception): | |
24 | pass | |
25 | ||
26 | class Decoder(srd.Decoder): | |
27 | api_version = 3 | |
28 | id = 'dali' | |
29 | name = 'DALI' | |
30 | longname = 'Digital Addressable Lighting Interface' | |
31 | desc = 'Digital Addressable Lighting Interface (DALI) protocol.' | |
32 | license = 'gplv2+' | |
33 | inputs = ['logic'] | |
34 | outputs = [] | |
35 | tags = ['Embedded/industrial', 'Lighting'] | |
36 | channels = ( | |
37 | {'id': 'dali', 'name': 'DALI', 'desc': 'DALI data line'}, | |
38 | ) | |
39 | options = ( | |
40 | {'id': 'polarity', 'desc': 'Polarity', 'default': 'active-low', | |
41 | 'values': ('active-low', 'active-high')}, | |
42 | ) | |
43 | annotations = ( | |
44 | ('bit', 'Bit'), | |
45 | ('startbit', 'Start bit'), | |
46 | ('sbit', 'Select bit'), | |
47 | ('ybit', 'Individual or group'), | |
48 | ('address', 'Address'), | |
49 | ('command', 'Command'), | |
50 | ('reply', 'Reply data'), | |
51 | ('raw', 'Raw data'), | |
52 | ) | |
53 | annotation_rows = ( | |
54 | ('bits', 'Bits', (0,)), | |
55 | ('raw-data', 'Raw data', (7,)), | |
56 | ('fields', 'Fields', (1, 2, 3, 4, 5, 6)), | |
57 | ) | |
58 | ||
59 | def __init__(self): | |
60 | self.reset() | |
61 | ||
62 | def reset(self): | |
63 | self.samplerate = None | |
64 | self.edges, self.bits, self.ss_es_bits = [], [], [] | |
65 | self.state = 'IDLE' | |
66 | self.dev_type = None | |
67 | ||
68 | def start(self): | |
69 | self.out_ann = self.register(srd.OUTPUT_ANN) | |
70 | self.old_dali = 1 if self.options['polarity'] == 'active-low' else 0 | |
71 | ||
72 | def metadata(self, key, value): | |
73 | if key == srd.SRD_CONF_SAMPLERATE: | |
74 | self.samplerate = value | |
75 | # One bit: 833.33us (one half low, one half high). | |
76 | # This is how may samples are in 1TE. | |
77 | self.halfbit = int((self.samplerate * 0.0008333) / 2.0) | |
78 | ||
79 | def putb(self, bit1, bit2, data): | |
80 | ss, es = self.ss_es_bits[bit1][0], self.ss_es_bits[bit2][1] | |
81 | self.put(ss, es, self.out_ann, data) | |
82 | ||
83 | def handle_bits(self, length): | |
84 | a, c, f, g, b = 0, 0, 0, 0, self.bits | |
85 | # Individual raw bits. | |
86 | for i in range(length): | |
87 | if i == 0: | |
88 | ss = max(0, self.bits[0][0]) | |
89 | else: | |
90 | ss = self.ss_es_bits[i - 1][1] | |
91 | es = self.bits[i][0] + (self.halfbit * 2) | |
92 | self.ss_es_bits.append([ss, es]) | |
93 | self.putb(i, i, [0, ['%d' % self.bits[i][1]]]) | |
94 | # Bits[0:0]: Startbit | |
95 | s = ['Startbit: %d' % b[0][1], 'ST: %d' % b[0][1], 'ST', 'S', 'S'] | |
96 | self.putb(0, 0, [1, s]) | |
97 | self.putb(0, 0, [7, s]) | |
98 | # Bits[1:8] | |
99 | for i in range(8): | |
100 | f |= (b[1 + i][1] << (7 - i)) | |
101 | if length == 9: # BACKWARD Frame | |
102 | s = ['Reply: %02X' % f, 'Rply: %02X' % f, | |
103 | 'Rep: %02X' % f, 'R: %02X' % f, 'R'] | |
104 | self.putb(1, 8, [7, s]) | |
105 | s = ['Reply: %d' % f, 'Rply: %d' % f, | |
106 | 'Rep: %d' % f, 'R: %d' % f, 'R'] | |
107 | self.putb(1, 8, [6, s]) | |
108 | return | |
109 | ||
110 | # FORWARD FRAME | |
111 | # Bits[9:16]: Command/data (MSB-first) | |
112 | for i in range(8): | |
113 | c |= (b[9 + i][1] << (7 - i)) | |
114 | # Raw output | |
115 | s = ['Raw data: %02X' % f, 'Raw: %02X' % f, | |
116 | 'Raw: %02X' % f, 'R: %02X' % f, 'R'] | |
117 | self.putb(1, 8, [7, s]) | |
118 | s = ['Raw data: %02X' % c, 'Raw: %02X' % c, | |
119 | 'Raw: %02X' % c, 'R: %02X' % c, 'R'] | |
120 | self.putb(9, 16, [7, s]) | |
121 | ||
122 | # Bits[8:8]: Select bit | |
123 | # s = ['Selectbit: %d' % b[8][1], 'SEL: %d' % b[8][1], 'SEL', 'SE', 'S'] | |
124 | if b[8][1] == 1: | |
125 | s = ['Command', 'Comd', 'COM', 'CO', 'C'] | |
126 | else: | |
127 | s = ['Arc Power Level', 'Arc Pwr', 'ARC', 'AC', 'A'] | |
128 | self.putb(8, 8, [1, s]) | |
129 | ||
130 | # f &= 254 # Clear the select bit. | |
131 | if f >= 254: # BROADCAST | |
132 | s = ['BROADCAST', 'Brdcast', 'BC', 'B', 'B'] | |
133 | self.putb(1, 7, [5, s]) | |
134 | elif f >= 160: # Extended command 0b10100000 | |
135 | if f == 0xC1: # DALI_ENABLE_DEVICE_TYPE_X | |
136 | self.dev_type = -1 | |
137 | x = extended_commands.get(f, ['Unknown', 'Unk']) | |
138 | s = ['Extended Command: %02X (%s)' % (f, x[0]), | |
139 | 'XC: %02X (%s)' % (f, x[1]), | |
140 | 'XC: %02X' % f, 'X: %02X' % f, 'X'] | |
141 | self.putb(1, 8, [5, s]) | |
142 | elif f >= 128: # Group | |
143 | # Bits[1:1]: Ybit | |
144 | s = ['YBit: %d' % b[1][1], 'YB: %d' % b[1][1], 'YB', 'Y', 'Y'] | |
145 | self.putb(1, 1, [3, s]) | |
146 | g = (f & 127) >> 1 | |
147 | s = ['Group address: %d' % g, 'Group: %d' % g, | |
148 | 'GP: %d' % g, 'G: %d' % g, 'G'] | |
149 | self.putb(2,7, [4, s]) | |
150 | else: # Short address | |
151 | # Bits[1:1]: Ybit | |
152 | s = ['YBit: %d' % b[1][1], 'YB: %d' % b[1][1], 'YB', 'Y', 'Y'] | |
153 | self.putb(1, 1, [3, s]) | |
154 | a = f >> 1 | |
155 | s = ['Short address: %d' % a, 'Addr: %d' % a, | |
156 | 'Addr: %d' % a, 'A: %d' % a, 'A'] | |
157 | self.putb(2, 7, [4, s]) | |
158 | ||
159 | # Bits[9:16]: Command/data (MSB-first) | |
160 | if f >= 160 and f < 254: | |
161 | if self.dev_type == -1: | |
162 | self.dev_type = c | |
163 | s = ['Type: %d' % c, 'Typ: %d' % c, | |
164 | 'Typ: %d' % c, 'T: %d' % c, 'D'] | |
165 | else: | |
166 | self.dev_type = None | |
167 | s = ['Data: %d' % c, 'Dat: %d' % c, | |
168 | 'Dat: %d' % c, 'D: %d' % c, 'D'] | |
169 | elif b[8][1] == 1: | |
170 | un = c & 0xF0 | |
171 | ln = c & 0x0F | |
172 | if un == 0x10: # Set scene command | |
173 | x = ['Recall Scene %d' % ln, 'SC %d' % ln] | |
174 | elif un == 0x40: | |
175 | x = ['Store DTR as Scene %d' % ln, 'SC %d = DTR' % ln] | |
176 | elif un == 0x50: | |
177 | x = ['Delete Scene %d' % ln, 'DEL SC %d' % ln] | |
178 | elif un == 0x60: | |
179 | x = ['Add to Group %d' % ln, 'Grp %d Add' % ln] | |
180 | elif un == 0x70: | |
181 | x = ['Remove from Group %d' % ln, 'Grp %d Del' % ln] | |
182 | elif un == 0xB0: | |
183 | x = ['Query Scene %d Level' % ln, 'Sc %d Level' % ln] | |
184 | elif c >= 224: # Application specific commands | |
185 | if self.dev_type == 8: | |
186 | x = dali_device_type8.get(c, ['Unknown App', 'Unk']) | |
187 | else: | |
188 | x = ['Application Specific Command %d' % c, 'App Cmd %d' % c] | |
189 | else: | |
190 | x = dali_commands.get(c, ['Unknown', 'Unk']) | |
191 | s = ['Command: %d (%s)' % (c, x[0]), 'Com: %d (%s)' % (c, x[1]), | |
192 | 'Com: %d' % c, 'C: %d' % c, 'C'] | |
193 | else: | |
194 | s = ['Arc Power Level: %d' % c, 'Level: %d' % c, | |
195 | 'Lev: %d' % c, 'L: %d' % c, 'L'] | |
196 | self.putb(9, 16, [5, s]) | |
197 | ||
198 | def reset_decoder_state(self): | |
199 | self.edges, self.bits, self.ss_es_bits = [], [], [] | |
200 | self.state = 'IDLE' | |
201 | ||
202 | def decode(self): | |
203 | if not self.samplerate: | |
204 | raise SamplerateError('Cannot decode without samplerate.') | |
205 | bit = 0 | |
206 | while True: | |
207 | # TODO: Come up with more appropriate self.wait() conditions. | |
208 | (dali,) = self.wait() | |
209 | if self.options['polarity'] == 'active-high': | |
210 | dali ^= 1 # Invert. | |
211 | ||
212 | # State machine. | |
213 | if self.state == 'IDLE': | |
214 | # Wait for any edge (rising or falling). | |
215 | if self.old_dali == dali: | |
216 | continue | |
217 | self.edges.append(self.samplenum) | |
218 | self.state = 'PHASE0' | |
219 | self.old_dali = dali | |
220 | continue | |
221 | ||
222 | if self.old_dali != dali: | |
223 | self.edges.append(self.samplenum) | |
224 | elif self.samplenum == (self.edges[-1] + int(self.halfbit * 1.5)): | |
225 | self.edges.append(self.samplenum - int(self.halfbit * 0.5)) | |
226 | else: | |
227 | continue | |
228 | ||
229 | bit = self.old_dali | |
230 | if self.state == 'PHASE0': | |
231 | self.phase0 = bit | |
232 | self.state = 'PHASE1' | |
233 | elif self.state == 'PHASE1': | |
234 | if (bit == 1) and (self.phase0 == 1): # Stop bit. | |
235 | if len(self.bits) == 17 or len(self.bits) == 9: | |
236 | # Forward or Backward. | |
237 | self.handle_bits(len(self.bits)) | |
238 | self.reset_decoder_state() # Reset upon errors. | |
239 | continue | |
240 | else: | |
241 | self.bits.append([self.edges[-3], bit]) | |
242 | self.state = 'PHASE0' | |
243 | ||
244 | self.old_dali = dali |