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cd0fc8c5 UH |
1 | ## |
2 | ## This file is part of the sigrok project. | |
3 | ## | |
c0d7b38e | 4 | ## Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de> |
cd0fc8c5 UH |
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 | # | |
cd0fc8c5 | 32 | |
677d597b | 33 | import sigrokdecode as srd |
1c8ac5bf | 34 | |
bffd9bc0 UH |
35 | # States |
36 | IDLE = 0 | |
37 | START = 1 | |
38 | NUNCHUK_SLAVE = 2 | |
39 | INIT = 3 | |
40 | INITIALIZED = 4 | |
41 | ||
677d597b | 42 | class Decoder(srd.Decoder): |
2b7d0e2b | 43 | id = 'nunchuk' |
012cfd0d | 44 | name = 'Nunchuk' |
3d3da57d | 45 | longname = 'Nintendo Wii Nunchuk' |
012cfd0d UH |
46 | desc = 'Decodes the Nintendo Wii Nunchuk I2C-based protocol.' |
47 | longdesc = '...' | |
012cfd0d UH |
48 | license = 'gplv2+' |
49 | inputs = ['i2c'] | |
50 | outputs = ['nunchuck'] | |
1f24514c | 51 | probes = [] # TODO |
012cfd0d | 52 | options = {} |
c0d7b38e UH |
53 | annotations = [ |
54 | ['TODO', 'TODO'], | |
55 | ] | |
012cfd0d UH |
56 | |
57 | def __init__(self, **kwargs): | |
bffd9bc0 | 58 | self.state = IDLE # TODO: Can we assume a certain initial state? |
012cfd0d | 59 | self.sx = self.sy = self.ax = self.ay = self.az = self.bz = self.bc = 0 |
012cfd0d UH |
60 | self.databytecount = 0 |
61 | ||
62 | def start(self, metadata): | |
56202222 UH |
63 | # self.out_proto = self.add(srd.OUTPUT_PROTO, 'nunchuk') |
64 | self.out_ann = self.add(srd.OUTPUT_ANN, 'nunchuk') | |
012cfd0d UH |
65 | |
66 | def report(self): | |
67 | pass | |
68 | ||
2b9837d9 | 69 | def decode(self, ss, es, data): |
c0d7b38e UH |
70 | |
71 | cmd, databyte, ack_bit = data | |
72 | ||
73 | if cmd == 'START': # TODO: Handle 'Sr' here, too? | |
74 | self.state = START | |
75 | ||
a2d2aff2 | 76 | elif cmd == 'START REPEAT': |
c0d7b38e UH |
77 | pass # FIXME |
78 | ||
a2d2aff2 | 79 | elif cmd == 'ADDRESS READ': |
c0d7b38e UH |
80 | # TODO: Error/Warning, not supported, I think. |
81 | pass | |
82 | ||
a2d2aff2 | 83 | elif cmd == 'ADDRESS WRITE': |
c0d7b38e UH |
84 | # The Wii Nunchuk always has slave address 0x54. |
85 | # TODO: Handle this stuff more correctly. | |
86 | if databyte == 0x54: | |
87 | pass # TODO | |
88 | else: | |
89 | pass # TODO: What to do here? Ignore? Error? | |
90 | ||
a2d2aff2 | 91 | elif cmd == 'DATA READ' and self.state == INITIALIZED: |
c0d7b38e UH |
92 | if self.databytecount == 0: |
93 | self.sx = databyte | |
94 | elif self.databytecount == 1: | |
95 | self.sy = databyte | |
96 | elif self.databytecount == 2: | |
97 | self.ax = databyte << 2 | |
98 | elif self.databytecount == 3: | |
99 | self.ay = databyte << 2 | |
100 | elif self.databytecount == 4: | |
101 | self.az = databyte << 2 | |
102 | elif self.databytecount == 5: | |
103 | self.bz = (databyte & (1 << 0)) >> 0 | |
104 | self.bc = (databyte & (1 << 1)) >> 1 | |
105 | self.ax |= (databyte & (3 << 2)) >> 2 | |
106 | self.ay |= (databyte & (3 << 4)) >> 4 | |
107 | self.az |= (databyte & (3 << 6)) >> 6 | |
108 | ||
109 | d = 'sx = 0x%02x, sy = 0x%02x, ax = 0x%02x, ay = 0x%02x, ' \ | |
110 | 'az = 0x%02x, bz = 0x%02x, bc = 0x%02x' % (self.sx, \ | |
111 | self.sy, self.ax, self.ay, self.az, self.bz, self.bc) | |
112 | self.put(ss, es, self.out_ann, [0, [d]]) | |
113 | ||
114 | self.sx = self.sy = self.ax = self.ay = self.az = 0 | |
115 | self.bz = self.bc = 0 | |
116 | else: | |
117 | pass # TODO | |
118 | ||
119 | if 0 <= self.databytecount <= 5: | |
120 | self.databytecount += 1 | |
121 | ||
122 | # TODO: If 6 bytes read -> save and reset | |
123 | ||
124 | # TODO | |
a2d2aff2 | 125 | elif cmd == 'DATA READ' and self.state != INITIALIZED: |
c0d7b38e UH |
126 | pass |
127 | ||
a2d2aff2 | 128 | elif cmd == 'DATA WRITE': |
c0d7b38e UH |
129 | if self.state == IDLE: |
130 | self.state = INITIALIZED | |
131 | return | |
132 | ||
133 | if databyte == 0x40 and self.state == START: | |
134 | self.state = INIT | |
135 | elif databyte == 0x00 and self.state == INIT: | |
136 | self.put(ss, es, self.out_ann, [0, ['Initialize nunchuk']]) | |
bffd9bc0 | 137 | self.state = INITIALIZED |
c0d7b38e UH |
138 | else: |
139 | pass # TODO | |
012cfd0d | 140 | |
c0d7b38e UH |
141 | elif cmd == 'STOP': |
142 | self.state = INITIALIZED | |
143 | self.databytecount = 0 | |
2b7d0e2b | 144 |