# Nintendo Wii Nunchuk decoder
#
+#
# TODO: Description
+#
+# http://wiibrew.org/wiki/Wiimote/Extension_Controllers/Nunchuck
+# http://todbot.com/blog/2008/02/18/wiichuck-wii-nunchuck-adapter-available/
+# https://www.sparkfun.com/products/9281
+#
# FIXME: This is just some example input for testing purposes...
example_packets = [
{'type': 'P', 'range': (32, 33), 'data': None, 'ann': ''},
]
-def decode(l):
- print(l)
- sigrok.put(l)
-
-
-def decode2(inbuf):
- """Nintendo Wii Nunchuk decoder"""
-
- # FIXME: Get the data in the correct format in the first place.
- inbuf = [ord(x) for x in inbuf]
- out = []
- o = {}
-
- # TODO: Pass in metadata.
-
- # States
- IDLE, START, NUNCHUK_SLAVE, INIT, INITIALIZED = range(5)
- state = IDLE # TODO: Can we assume a certain initial state?
-
- sx = sy = ax = ay = az = bz = bc = 0
-
- databytecount = 0
-
- # Loop over all I2C packets.
- for p in example_packets:
- if p['type'] == 'S': # TODO: Handle 'Sr' here, too?
- state = START
-
- elif p['type'] == 'Sr':
- pass # FIXME
-
- elif p['type'] == 'AR':
- # TODO: Error/Warning, not supported, I think.
- pass
-
- elif p['type'] == 'AW':
- # The Wii Nunchuk always has slave address 0x54.
- # TODO: Handle this stuff more correctly.
- if p['data'] == 0x54:
- pass # TODO
- else:
- pass # TODO: What to do here? Ignore? Error?
-
- elif p['type'] == 'DR' and state == INITIALIZED:
- if databytecount == 0:
- sx = p['data']
- elif databytecount == 1:
- sy = p['data']
- elif databytecount == 2:
- ax = p['data'] << 2
- elif databytecount == 3:
- ay = p['data'] << 2
- elif databytecount == 4:
- az = p['data'] << 2
- elif databytecount == 5:
- bz = (p['data'] & (1 << 0)) >> 0
- bc = (p['data'] & (1 << 1)) >> 1
- ax |= (p['data'] & (3 << 2)) >> 2
- ay |= (p['data'] & (3 << 4)) >> 4
- az |= (p['data'] & (3 << 6)) >> 6
- # del o
- o = {'type': 'D', 'range': (0, 0), 'data': []}
- o['data'] = [sx, sy, ax, ay, az, bz, bc]
- # sx = sy = ax = ay = az = bz = bc = 0
- else:
- pass # TODO
-
- if 0 <= databytecount <= 5:
- databytecount += 1
-
- # TODO: If 6 bytes read -> save and reset
-
- # TODO
- elif p['type'] == 'DR' and state != INITIALIZED:
- pass
-
- elif p['type'] == 'DW':
- if p['data'] == 0x40 and state == START:
- state = INIT
- elif p['data'] == 0x00 and state == INIT:
- o = {'type': 'I', 'range': (0, 0), 'data': []}
- o['data'] = [0x40, 0x00]
+class Sample():
+ def __init__(self, data):
+ self.data = data
+ def probe(self, probe):
+ s = ord(self.data[probe / 8]) & (1 << (probe % 8))
+ return True if s else False
+
+def sampleiter(data, unitsize):
+ for i in range(0, len(data), unitsize):
+ yield(Sample(data[i:i+unitsize]))
+
+class Decoder():
+ name = 'Nunchuk'
+ longname = 'Nintendo Wii Nunchuk decoder'
+ desc = 'Decodes the Nintendo Wii Nunchuk I2C-based protocol.'
+ longdesc = '...'
+ author = 'Uwe Hermann'
+ email = 'uwe@hermann-uwe.de'
+ license = 'gplv2+'
+ inputs = ['i2c']
+ outputs = ['nunchuck']
+ probes = {}
+ options = {}
+
+ def __init__(self, **kwargs):
+ self.probes = Decoder.probes.copy()
+
+ # TODO: Don't hardcode the number of channels.
+ self.channels = 8
+
+ self.IDLE, self.START, self.NUNCHUK_SLAVE, self.INIT, \
+ self.INITIALIZED = range(5)
+
+ self.state = self.IDLE # TODO: Can we assume a certain initial state?
+
+ self.sx = self.sy = self.ax = self.ay = self.az = self.bz = self.bc = 0
+
+ self.databytecount = 0
+
+ def start(self, metadata):
+ self.unitsize = metadata['unitsize']
+
+ def report(self):
+ pass
+
+ def decode(self, data):
+ """Nintendo Wii Nunchuk decoder"""
+
+ out = []
+ o = {}
+
+ # We should accept a list of samples and iterate...
+ # for sample in sampleiter(data['data'], self.unitsize):
+ for p in example_packets:
+
+ # TODO: Eliminate the need for ord().
+ # s = ord(sample.data)
+
+ if p['type'] == 'S': # TODO: Handle 'Sr' here, too?
+ self.state = self.START
+
+ elif p['type'] == 'Sr':
+ pass # FIXME
+
+ elif p['type'] == 'AR':
+ # TODO: Error/Warning, not supported, I think.
+ pass
+
+ elif p['type'] == 'AW':
+ # The Wii Nunchuk always has slave address 0x54.
+ # TODO: Handle this stuff more correctly.
+ if p['data'] == 0x54:
+ pass # TODO
+ else:
+ pass # TODO: What to do here? Ignore? Error?
+
+ elif p['type'] == 'DR' and self.state == self.INITIALIZED:
+ if self.databytecount == 0:
+ self.sx = p['data']
+ elif self.databytecount == 1:
+ self.sy = p['data']
+ elif self.databytecount == 2:
+ self.ax = p['data'] << 2
+ elif self.databytecount == 3:
+ self.ay = p['data'] << 2
+ elif self.databytecount == 4:
+ self.az = p['data'] << 2
+ elif self.databytecount == 5:
+ self.bz = (p['data'] & (1 << 0)) >> 0
+ self.bc = (p['data'] & (1 << 1)) >> 1
+ self.ax |= (p['data'] & (3 << 2)) >> 2
+ self.ay |= (p['data'] & (3 << 4)) >> 4
+ self.az |= (p['data'] & (3 << 6)) >> 6
+ # del o
+ o = {'type': 'D', 'range': (0, 0), 'data': []}
+ o['data'] = [self.sx, self.sy, self.ax, self.ay, \
+ self.az, self.bz, self.bc]
+ # sx = sy = ax = ay = az = bz = bc = 0
+ else:
+ pass # TODO
+
+ if 0 <= self.databytecount <= 5:
+ self.databytecount += 1
+
+ # TODO: If 6 bytes read -> save and reset
+
+ # TODO
+ elif p['type'] == 'DR' and self.state != self.INITIALIZED:
+ pass
+
+ elif p['type'] == 'DW':
+ if p['data'] == 0x40 and self.state == self.START:
+ self.state = self.INIT
+ elif p['data'] == 0x00 and self.state == self.INIT:
+ o = {'type': 'I', 'range': (0, 0), 'data': []}
+ o['data'] = [0x40, 0x00]
+ out.append(o)
+ self.state = self.INITIALIZED
+ else:
+ pass # TODO
+
+ elif p['type'] == 'P':
out.append(o)
- state = INITIALIZED
- else:
- pass # TODO
-
- elif p['type'] == 'P':
- out.append(o)
- state = INITIALIZED
- databytecount = 0
-
- print out
-
- # FIXME
- return ''
-
-register = {
- 'id': 'nunchuk',
- 'name': 'Nunchuk',
- 'longname': 'Nintendo Wii Nunchuk decoder',
- 'desc': 'Decodes the Nintendo Wii Nunchuk I2C-based protocol.',
- 'longdesc': '...',
- 'author': 'Uwe Hermann',
- 'email': 'uwe@hermann-uwe.de',
- 'license': 'gplv2+',
- 'in': ['i2c'],
- 'out': ['nunchuck'],
- 'probes': [
- # TODO
- ],
- 'options': {
- # TODO
- },
- # 'start': start,
- # 'report': report,
-}
+ self.state = self.INITIALIZED
+ self.databytecount = 0
+
+ sigrok.put(out)
+
+import sigrok
projects / libsigrokdecode.git / blobdiff