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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 | ||
25 | # TODO: Description | |
26 | ||
27 | # FIXME: This is just some example input for testing purposes... | |
28 | example_packets = [ | |
29 | # START condition. | |
30 | {'type': 'S', 'range': (10, 11), 'data': None, 'ann': ''}, | |
31 | ||
32 | # Nunchuk init: Write 0x40,0x00 to slave address 0x54. | |
33 | {'type': 'AW', 'range': (12, 13), 'data': 0x54, 'ann': ''}, | |
34 | {'type': 'DW', 'range': (14, 15), 'data': 0x40, 'ann': ''}, | |
35 | {'type': 'AW', 'range': (16, 17), 'data': 0x54, 'ann': ''}, | |
36 | {'type': 'DW', 'range': (18, 19), 'data': 0x00, 'ann': ''}, | |
37 | ||
38 | # Get data: Read 6 bytes of data. | |
39 | {'type': 'DR', 'range': (20, 21), 'data': 0x11, 'ann': ''}, | |
40 | {'type': 'DR', 'range': (22, 23), 'data': 0x22, 'ann': ''}, | |
41 | {'type': 'DR', 'range': (24, 25), 'data': 0x33, 'ann': ''}, | |
42 | {'type': 'DR', 'range': (26, 27), 'data': 0x44, 'ann': ''}, | |
43 | {'type': 'DR', 'range': (28, 29), 'data': 0x55, 'ann': ''}, | |
44 | {'type': 'DR', 'range': (30, 31), 'data': 0x66, 'ann': ''}, | |
45 | ||
46 | # STOP condition. | |
47 | {'type': 'P', 'range': (32, 33), 'data': None, 'ann': ''}, | |
48 | ] | |
49 | ||
50 | def decode(inbuf): | |
51 | """Nintendo Wii Nunchuk decoder""" | |
52 | ||
53 | # FIXME: Get the data in the correct format in the first place. | |
54 | inbuf = [ord(x) for x in inbuf] | |
55 | out = [] | |
56 | o = {} | |
57 | ||
58 | # TODO: Pass in metadata. | |
59 | ||
60 | # States | |
61 | IDLE, START, NUNCHUK_SLAVE, INIT, INITIALIZED = range(5) | |
62 | state = IDLE # TODO: Can we assume a certain initial state? | |
63 | ||
64 | sx = sy = ax = ay = az = bz = bc = 0 | |
65 | ||
66 | databytecount = 0 | |
67 | ||
68 | # Loop over all I2C packets. | |
69 | for p in example_packets: | |
70 | if p['type'] == 'S': # TODO: Handle 'Sr' here, too? | |
71 | state = START | |
72 | ||
73 | elif p['type'] == 'Sr': | |
74 | pass # FIXME | |
75 | ||
76 | elif p['type'] == 'AR': | |
77 | # TODO: Error/Warning, not supported, I think. | |
78 | pass | |
79 | ||
80 | elif p['type'] == 'AW': | |
81 | # The Wii Nunchuk always has slave address 0x54. | |
82 | # TODO: Handle this stuff more correctly. | |
83 | if p['data'] == 0x54: | |
84 | pass # TODO | |
85 | else: | |
86 | pass # TODO: What to do here? Ignore? Error? | |
87 | ||
88 | elif p['type'] == 'DR' and state == INITIALIZED: | |
89 | if databytecount == 0: | |
90 | sx = p['data'] | |
91 | elif databytecount == 1: | |
92 | sy = p['data'] | |
93 | elif databytecount == 2: | |
94 | ax = p['data'] << 2 | |
95 | elif databytecount == 3: | |
96 | ay = p['data'] << 2 | |
97 | elif databytecount == 4: | |
98 | az = p['data'] << 2 | |
99 | elif databytecount == 5: | |
100 | bz = (p['data'] & (1 << 0)) >> 0 | |
101 | bc = (p['data'] & (1 << 1)) >> 1 | |
102 | ax |= (p['data'] & (3 << 2)) >> 2 | |
103 | ay |= (p['data'] & (3 << 4)) >> 4 | |
104 | az |= (p['data'] & (3 << 6)) >> 6 | |
105 | # del o | |
106 | o = {'type': 'D', 'range': (0, 0), 'data': []} | |
107 | o['data'] = [sx, sy, ax, ay, az, bz, bc] | |
108 | # sx = sy = ax = ay = az = bz = bc = 0 | |
109 | else: | |
110 | pass # TODO | |
111 | ||
112 | if 0 <= databytecount <= 5: | |
113 | databytecount += 1 | |
114 | ||
115 | # TODO: If 6 bytes read -> save and reset | |
116 | ||
117 | # TODO | |
118 | elif p['type'] == 'DR' and state != INITIALIZED: | |
119 | pass | |
120 | ||
121 | elif p['type'] == 'DW': | |
122 | if p['data'] == 0x40 and state == START: | |
123 | state = INIT | |
124 | elif p['data'] == 0x00 and state == INIT: | |
125 | o = {'type': 'I', 'range': (0, 0), 'data': []} | |
126 | o['data'] = [0x40, 0x00] | |
127 | out.append(o) | |
128 | state = INITIALIZED | |
129 | else: | |
130 | pass # TODO | |
131 | ||
132 | elif p['type'] == 'P': | |
133 | out.append(o) | |
134 | state = INITIALIZED | |
135 | databytecount = 0 | |
136 | ||
137 | print out | |
138 | ||
139 | # FIXME | |
140 | return '' | |
141 | ||
142 | def register(): | |
143 | return { | |
144 | 'id': 'nunchuk', | |
145 | 'name': 'Nunchuk', | |
4ed59136 UH |
146 | 'longname': 'Nintendo Wii Nunchuk decoder', |
147 | 'desc': 'Decodes the Nintendo Wii Nunchuk I2C-based protocol.', | |
148 | 'longdesc': '...', | |
149 | 'author': 'Uwe Hermann', | |
150 | 'email': 'uwe@hermann-uwe.de', | |
151 | 'license': 'gplv2+', | |
152 | 'in': ['i2c'], | |
153 | 'out': ['nunchuck'], | |
154 | 'probes': [ | |
155 | # TODO | |
156 | ], | |
157 | 'options': { | |
158 | # TODO | |
159 | }, | |
160 | # 'start': start, | |
161 | # 'report': report, | |
cd0fc8c5 UH |
162 | } |
163 | ||
164 | # Use psyco (if available) as it results in huge performance improvements. | |
165 | try: | |
166 | import psyco | |
167 | psyco.bind(decode) | |
168 | except ImportError: | |
169 | pass | |
170 |