]>
Commit | Line | Data |
---|---|---|
1 | ## | |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2014 Gump Yang <gump.yang@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 = 1 | |
25 | id = 'ir_nec6122' | |
26 | name = 'IR NEC 6122' | |
27 | longname = '1-Wire Infrared remote controller NEC 6122' | |
28 | desc = 'Unidirectional, asynchronous serial bus.' | |
29 | license = 'gplv2+' | |
30 | inputs = ['logic'] | |
31 | outputs = ['ir_nec6122'] | |
32 | probes = [ | |
33 | {'id': 'ir', 'name': 'IR', 'desc': 'Data line'}, | |
34 | ] | |
35 | optional_probes = [] | |
36 | options = { | |
37 | 'level': ['Tirgger Level L/H', 0], | |
38 | 'cnt_peroid': ['Peroid time (us)', 13500], | |
39 | 'cnt_repeat': ['Repeat time (us)', 11250], | |
40 | 'cnt_repeat_end': ['Repeat end time (us)', 562], | |
41 | 'cnt_accuracy': ['Accuracy range (us)', 100], | |
42 | 'cnt_dazero': ['Data 0 time (us)', 1125], | |
43 | 'cnt_daone': ['Data 1 time (us)', 2250], | |
44 | 'polarity': ['Polarity', 'active-low'], | |
45 | } | |
46 | annotations = [ | |
47 | ['bit', 'Bit'], | |
48 | ['preoid', 'Preoid'], | |
49 | ['info', 'Info'], | |
50 | ['error', 'Error'], | |
51 | ] | |
52 | annotation_rows = ( | |
53 | ('fields', 'Fields', (1, 2, 3, 4, 5, 6)), | |
54 | ('bits', 'Bits', (0,)), | |
55 | ) | |
56 | ||
57 | def putx(self, data): | |
58 | self.put(self.ss_edge, self.samplenum, self.out_ann, data) | |
59 | ||
60 | def putx(self, data): | |
61 | self.put(self.ss_start, self.samplenum, self.out_ann, data) | |
62 | ||
63 | def putb(self, data): | |
64 | self.put(self.ss_bit, self.samplenum, self.out_ann, data) | |
65 | ||
66 | def __init__(self, **kwargs): | |
67 | self.olddata = None | |
68 | self.ss_edge = 0 | |
69 | self.ss_bit = 0 | |
70 | self.first_transition = True | |
71 | self.bitwidth = None | |
72 | self.state = 'IDLE' | |
73 | self.data = 0; | |
74 | self.count = 0; | |
75 | self.ss_start = 0 | |
76 | self.act_polar = 0 | |
77 | ||
78 | def start(self): | |
79 | # self.out_python = self.register(srd.OUTPUT_PYTHON) | |
80 | self.out_ann = self.register(srd.OUTPUT_ANN) | |
81 | self.act_polar = 1 if self.options['polarity'] == 'active-low' else 0 | |
82 | self.old_ir = self.act_polar | |
83 | ||
84 | def metadata(self, key, value): | |
85 | if key == srd.SRD_CONF_SAMPLERATE: | |
86 | self.samplerate = value | |
87 | samplerate = float(self.samplerate) | |
88 | ||
89 | x = float(self.options['cnt_accuracy']) / 1000000.0 | |
90 | self.margin = int(samplerate * x) - 1 | |
91 | x = float(self.options['cnt_peroid']) / 1000000.0 | |
92 | self.preoid = int(samplerate * x) - 1 | |
93 | x = float(self.options['cnt_repeat']) / 1000000.0 | |
94 | self.repeat = int(samplerate * x) - 1 | |
95 | x = float(self.options['cnt_repeat_end']) / 1000000.0 | |
96 | self.repeat_end = int(samplerate * x) - 1 | |
97 | x = float(self.options['cnt_dazero']) / 1000000.0 | |
98 | self.dazero = int(samplerate * x) - 1 | |
99 | x = float(self.options['cnt_daone']) / 1000000.0 | |
100 | self.daone = int(samplerate * x) - 1 | |
101 | x = float(10000) / 1000000.0 | |
102 | self.end = int(samplerate * x) - 1 | |
103 | ||
104 | def handle_bits(self, tick): | |
105 | ret = 0xff | |
106 | if tick in range(self.dazero - self.margin, | |
107 | self.dazero + self.margin): | |
108 | ret = 0 | |
109 | elif tick in range(self.daone - self.margin, | |
110 | self.daone + self.margin): | |
111 | ret = 1 | |
112 | ||
113 | if ret < 2: | |
114 | self.putb([0, ['%d' % ret]]) | |
115 | self.data = self.data * 2 + ret | |
116 | self.count = self.count + 1 | |
117 | ||
118 | self.ss_bit = self.samplenum | |
119 | return ret; | |
120 | ||
121 | def data_judge(self, name): | |
122 | buf = int((self.data & 0xff00) / 0x100) | |
123 | nbuf = int(self.data & 0xff) | |
124 | ret = buf & nbuf | |
125 | if ret == 0: | |
126 | self.putx([2, ['%s: 0x%02x' % (name, buf)]]) | |
127 | else: | |
128 | self.putx([3, ['%s Error: 0x%04x' % (name, self.data)]]) | |
129 | ||
130 | self.data = self.count = 0 | |
131 | self.ss_bit = self.ss_start = self.samplenum | |
132 | return ret | |
133 | ||
134 | def decode(self, ss, es, data): | |
135 | if self.samplerate is None: | |
136 | raise Exception("Cannot decode without samplerate.") | |
137 | for (self.samplenum, pins) in data: | |
138 | self.ir = pins[0] | |
139 | ||
140 | # Wait for any edge (rising or falling). | |
141 | if self.old_ir == self.ir: | |
142 | continue | |
143 | ||
144 | if self.old_ir == self.act_polar: | |
145 | b = self.samplenum - self.ss_bit | |
146 | # State machine. | |
147 | if self.state == 'IDLE': | |
148 | if b in range(self.preoid - self.margin, | |
149 | self.preoid + self.margin): | |
150 | self.putx([1, ['Preoid', 'Pre', 'P']]) | |
151 | self.data = self.count = 0 | |
152 | self.state = 'ADDRESS' | |
153 | elif b in range(self.repeat - self.margin, | |
154 | self.repeat + self.margin): | |
155 | self.putx([1, ['Repeat', 'Rep', 'R']]) | |
156 | self.data = self.count = 0 | |
157 | self.ss_bit = self.ss_start = self.samplenum | |
158 | elif self.state == 'ADDRESS': | |
159 | self.handle_bits(b) | |
160 | if self.count > 15: | |
161 | if self.data_judge(self.state) == 0: | |
162 | self.state = 'CODE' | |
163 | else: | |
164 | self.state = 'IDLE' | |
165 | elif self.state == 'CODE': | |
166 | self.handle_bits(b) | |
167 | if self.count > 15: | |
168 | self.data_judge(self.state) | |
169 | self.state = 'IDLE' | |
170 | ||
171 | self.old_ir = self.ir | |
172 |