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1 | ## |
2 | ## This file is part of the sigrok project. | |
3 | ## | |
4 | ## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.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, write to the Free Software | |
18 | ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | ## | |
20 | ||
21 | # | |
22 | # Nintendo Wii Nunchuk decoder | |
23 | # | |
24 | ||
16ba97cf | 25 | # |
cd0fc8c5 | 26 | # TODO: Description |
16ba97cf UH |
27 | # |
28 | # http://wiibrew.org/wiki/Wiimote/Extension_Controllers/Nunchuck | |
29 | # http://todbot.com/blog/2008/02/18/wiichuck-wii-nunchuck-adapter-available/ | |
30 | # https://www.sparkfun.com/products/9281 | |
31 | # | |
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32 | |
33 | # FIXME: This is just some example input for testing purposes... | |
34 | example_packets = [ | |
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35 | # START condition. |
36 | {'type': 'S', 'range': (10, 11), 'data': None, 'ann': ''}, | |
37 | ||
38 | # Nunchuk init: Write 0x40,0x00 to slave address 0x54. | |
39 | {'type': 'AW', 'range': (12, 13), 'data': 0x54, 'ann': ''}, | |
40 | {'type': 'DW', 'range': (14, 15), 'data': 0x40, 'ann': ''}, | |
41 | {'type': 'AW', 'range': (16, 17), 'data': 0x54, 'ann': ''}, | |
42 | {'type': 'DW', 'range': (18, 19), 'data': 0x00, 'ann': ''}, | |
43 | ||
44 | # Get data: Read 6 bytes of data. | |
45 | {'type': 'DR', 'range': (20, 21), 'data': 0x11, 'ann': ''}, | |
46 | {'type': 'DR', 'range': (22, 23), 'data': 0x22, 'ann': ''}, | |
47 | {'type': 'DR', 'range': (24, 25), 'data': 0x33, 'ann': ''}, | |
48 | {'type': 'DR', 'range': (26, 27), 'data': 0x44, 'ann': ''}, | |
49 | {'type': 'DR', 'range': (28, 29), 'data': 0x55, 'ann': ''}, | |
50 | {'type': 'DR', 'range': (30, 31), 'data': 0x66, 'ann': ''}, | |
51 | ||
52 | # STOP condition. | |
53 | {'type': 'P', 'range': (32, 33), 'data': None, 'ann': ''}, | |
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54 | ] |
55 | ||
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56 | class Sample(): |
57 | def __init__(self, data): | |
58 | self.data = data | |
59 | def probe(self, probe): | |
60 | s = ord(self.data[probe / 8]) & (1 << (probe % 8)) | |
61 | return True if s else False | |
62 | ||
63 | def sampleiter(data, unitsize): | |
64 | for i in range(0, len(data), unitsize): | |
65 | yield(Sample(data[i:i+unitsize])) | |
66 | ||
67 | class Decoder(): | |
68 | name = 'Nunchuk' | |
69 | longname = 'Nintendo Wii Nunchuk decoder' | |
70 | desc = 'Decodes the Nintendo Wii Nunchuk I2C-based protocol.' | |
71 | longdesc = '...' | |
72 | author = 'Uwe Hermann' | |
73 | email = 'uwe@hermann-uwe.de' | |
74 | license = 'gplv2+' | |
75 | inputs = ['i2c'] | |
76 | outputs = ['nunchuck'] | |
77 | probes = {} | |
78 | options = {} | |
79 | ||
80 | def __init__(self, **kwargs): | |
81 | self.probes = Decoder.probes.copy() | |
82 | ||
83 | # TODO: Don't hardcode the number of channels. | |
84 | self.channels = 8 | |
85 | ||
86 | self.IDLE, self.START, self.NUNCHUK_SLAVE, self.INIT, \ | |
87 | self.INITIALIZED = range(5) | |
88 | ||
89 | self.state = self.IDLE # TODO: Can we assume a certain initial state? | |
90 | ||
91 | self.sx = self.sy = self.ax = self.ay = self.az = self.bz = self.bc = 0 | |
92 | ||
93 | self.databytecount = 0 | |
94 | ||
95 | def start(self, metadata): | |
96 | self.unitsize = metadata['unitsize'] | |
97 | ||
98 | def report(self): | |
99 | pass | |
100 | ||
101 | def decode(self, data): | |
102 | """Nintendo Wii Nunchuk decoder""" | |
103 | ||
104 | out = [] | |
105 | o = {} | |
106 | ||
107 | # We should accept a list of samples and iterate... | |
108 | # for sample in sampleiter(data['data'], self.unitsize): | |
109 | for p in example_packets: | |
110 | ||
111 | # TODO: Eliminate the need for ord(). | |
112 | # s = ord(sample.data) | |
113 | ||
114 | if p['type'] == 'S': # TODO: Handle 'Sr' here, too? | |
115 | self.state = self.START | |
116 | ||
117 | elif p['type'] == 'Sr': | |
118 | pass # FIXME | |
119 | ||
120 | elif p['type'] == 'AR': | |
121 | # TODO: Error/Warning, not supported, I think. | |
122 | pass | |
123 | ||
124 | elif p['type'] == 'AW': | |
125 | # The Wii Nunchuk always has slave address 0x54. | |
126 | # TODO: Handle this stuff more correctly. | |
127 | if p['data'] == 0x54: | |
128 | pass # TODO | |
129 | else: | |
130 | pass # TODO: What to do here? Ignore? Error? | |
131 | ||
132 | elif p['type'] == 'DR' and self.state == self.INITIALIZED: | |
133 | if self.databytecount == 0: | |
134 | self.sx = p['data'] | |
135 | elif self.databytecount == 1: | |
136 | self.sy = p['data'] | |
137 | elif self.databytecount == 2: | |
138 | self.ax = p['data'] << 2 | |
139 | elif self.databytecount == 3: | |
140 | self.ay = p['data'] << 2 | |
141 | elif self.databytecount == 4: | |
142 | self.az = p['data'] << 2 | |
143 | elif self.databytecount == 5: | |
144 | self.bz = (p['data'] & (1 << 0)) >> 0 | |
145 | self.bc = (p['data'] & (1 << 1)) >> 1 | |
146 | self.ax |= (p['data'] & (3 << 2)) >> 2 | |
147 | self.ay |= (p['data'] & (3 << 4)) >> 4 | |
148 | self.az |= (p['data'] & (3 << 6)) >> 6 | |
149 | # del o | |
150 | o = {'type': 'D', 'range': (0, 0), 'data': []} | |
151 | o['data'] = [self.sx, self.sy, self.ax, self.ay, \ | |
152 | self.az, self.bz, self.bc] | |
153 | # sx = sy = ax = ay = az = bz = bc = 0 | |
154 | else: | |
155 | pass # TODO | |
156 | ||
157 | if 0 <= self.databytecount <= 5: | |
158 | self.databytecount += 1 | |
159 | ||
160 | # TODO: If 6 bytes read -> save and reset | |
161 | ||
162 | # TODO | |
163 | elif p['type'] == 'DR' and self.state != self.INITIALIZED: | |
164 | pass | |
165 | ||
166 | elif p['type'] == 'DW': | |
167 | if p['data'] == 0x40 and self.state == self.START: | |
168 | self.state = self.INIT | |
169 | elif p['data'] == 0x00 and self.state == self.INIT: | |
170 | o = {'type': 'I', 'range': (0, 0), 'data': []} | |
171 | o['data'] = [0x40, 0x00] | |
172 | out.append(o) | |
173 | self.state = self.INITIALIZED | |
174 | else: | |
175 | pass # TODO | |
176 | ||
177 | elif p['type'] == 'P': | |
ad2dc0de | 178 | out.append(o) |
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179 | self.state = self.INITIALIZED |
180 | self.databytecount = 0 | |
181 | ||
182 | sigrok.put(out) | |
183 | ||
184 | import sigrok | |
cd0fc8c5 | 185 |