2 ## This file is part of the sigrok project.
4 ## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
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.
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.
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
22 # Nintendo Wii Nunchuk decoder
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
33 import sigrokdecode as srd
42 # FIXME: This is just some example input for testing purposes...
45 {'type': 'S', 'range': (10, 11), 'data': None, 'ann': ''},
47 # Nunchuk init: Write 0x40,0x00 to slave address 0x54.
48 {'type': 'AW', 'range': (12, 13), 'data': 0x54, 'ann': ''},
49 {'type': 'DW', 'range': (14, 15), 'data': 0x40, 'ann': ''},
50 {'type': 'AW', 'range': (16, 17), 'data': 0x54, 'ann': ''},
51 {'type': 'DW', 'range': (18, 19), 'data': 0x00, 'ann': ''},
53 # Get data: Read 6 bytes of data.
54 {'type': 'DR', 'range': (20, 21), 'data': 0x11, 'ann': ''},
55 {'type': 'DR', 'range': (22, 23), 'data': 0x22, 'ann': ''},
56 {'type': 'DR', 'range': (24, 25), 'data': 0x33, 'ann': ''},
57 {'type': 'DR', 'range': (26, 27), 'data': 0x44, 'ann': ''},
58 {'type': 'DR', 'range': (28, 29), 'data': 0x55, 'ann': ''},
59 {'type': 'DR', 'range': (30, 31), 'data': 0x66, 'ann': ''},
62 {'type': 'P', 'range': (32, 33), 'data': None, 'ann': ''},
65 class Decoder(srd.Decoder):
68 longname = 'Nintendo Wii Nunchuk decoder'
69 desc = 'Decodes the Nintendo Wii Nunchuk I2C-based protocol.'
71 author = 'Uwe Hermann'
72 email = 'uwe@hermann-uwe.de'
75 outputs = ['nunchuck']
80 def __init__(self, **kwargs):
81 self.state = IDLE # TODO: Can we assume a certain initial state?
83 self.sx = self.sy = self.ax = self.ay = self.az = self.bz = self.bc = 0
85 self.databytecount = 0
87 def start(self, metadata):
88 # self.out_proto = self.add(srd.OUTPUT_PROTO, 'nunchuk')
89 self.out_ann = self.add(srd.OUTPUT_ANN, 'nunchuk')
94 def decode(self, timeoffset, duration, data):
98 # We should accept a list of samples and iterate...
99 for p in example_packets: # TODO
101 # TODO: Eliminate the need for ord().
102 # s = ord(sample.data)
104 if p['type'] == 'S': # TODO: Handle 'Sr' here, too?
107 elif p['type'] == 'Sr':
110 elif p['type'] == 'AR':
111 # TODO: Error/Warning, not supported, I think.
114 elif p['type'] == 'AW':
115 # The Wii Nunchuk always has slave address 0x54.
116 # TODO: Handle this stuff more correctly.
117 if p['data'] == 0x54:
120 pass # TODO: What to do here? Ignore? Error?
122 elif p['type'] == 'DR' and self.state == INITIALIZED:
123 if self.databytecount == 0:
125 elif self.databytecount == 1:
127 elif self.databytecount == 2:
128 self.ax = p['data'] << 2
129 elif self.databytecount == 3:
130 self.ay = p['data'] << 2
131 elif self.databytecount == 4:
132 self.az = p['data'] << 2
133 elif self.databytecount == 5:
134 self.bz = (p['data'] & (1 << 0)) >> 0
135 self.bc = (p['data'] & (1 << 1)) >> 1
136 self.ax |= (p['data'] & (3 << 2)) >> 2
137 self.ay |= (p['data'] & (3 << 4)) >> 4
138 self.az |= (p['data'] & (3 << 6)) >> 6
140 o = {'type': 'D', 'range': (0, 0), 'data': []}
141 o['data'] = [self.sx, self.sy, self.ax, self.ay, \
142 self.az, self.bz, self.bc]
143 # sx = sy = ax = ay = az = bz = bc = 0
147 if 0 <= self.databytecount <= 5:
148 self.databytecount += 1
150 # TODO: If 6 bytes read -> save and reset
153 elif p['type'] == 'DR' and self.state != INITIALIZED:
156 elif p['type'] == 'DW':
157 if p['data'] == 0x40 and self.state == START:
159 elif p['data'] == 0x00 and self.state == INIT:
160 o = {'type': 'I', 'range': (0, 0), 'data': []}
161 o['data'] = [0x40, 0x00]
163 self.state = INITIALIZED
167 elif p['type'] == 'P':
169 self.state = INITIALIZED
170 self.databytecount = 0
173 # self.put(0, 0, self.out_proto, out_proto)
174 self.put(0, 0, self.out_ann, out)