## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
##
-SUBDIRS = scripts
+SUBDIRS = decoders
lib_LTLIBRARIES = libsigrokdecode.la
/* FIXME: What happens if this function is called multiple times? */
PyRun_SimpleString(
"import sys;"
- "sys.path.append('libsigrokdecode/scripts');"
- "sys.path.append('../libsigrokdecode/scripts');"
+ "sys.path.append('libsigrokdecode/decoders');"
+ "sys.path.append('../libsigrokdecode/decoders');"
"sys.path.append('/usr/local/share/sigrok');"
);
--- /dev/null
+##
+## This file is part of the sigrok project.
+##
+## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+##
+
+dist_pkgdata_SCRIPTS = i2c.py nunchuk.py transitioncounter.py
+
+CLEANFILES = *.pyc
+
--- /dev/null
+##
+## This file is part of the sigrok project.
+##
+## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+##
+
+#
+# I2C protocol decoder
+#
+
+#
+# The Inter-Integrated Circuit (I2C) bus is a bidirectional, multi-master
+# bus using two signals (SCL = serial clock line, SDA = serial data line).
+#
+# There can be many devices on the same bus. Each device can potentially be
+# master or slave (and that can change during runtime). Both slave and master
+# can potentially play the transmitter or receiver role (this can also
+# change at runtime).
+#
+# Possible maximum data rates:
+# - Standard mode: 100 kbit/s
+# - Fast mode: 400 kbit/s
+# - Fast-mode Plus: 1 Mbit/s
+# - High-speed mode: 3.4 Mbit/s
+#
+# START condition (S): SDA = falling, SCL = high
+# Repeated START condition (Sr): same as S
+# STOP condition (P): SDA = rising, SCL = high
+#
+# All data bytes on SDA are exactly 8 bits long (transmitted MSB-first).
+# Each byte has to be followed by a 9th ACK/NACK bit. If that bit is low,
+# that indicates an ACK, if it's high that indicates a NACK.
+#
+# After the first START condition, a master sends the device address of the
+# slave it wants to talk to. Slave addresses are 7 bits long (MSB-first).
+# After those 7 bits, a data direction bit is sent. If the bit is low that
+# indicates a WRITE operation, if it's high that indicates a READ operation.
+#
+# Later an optional 10bit slave addressing scheme was added.
+#
+# Documentation:
+# http://www.nxp.com/acrobat/literature/9398/39340011.pdf (v2.1 spec)
+# http://www.nxp.com/acrobat/usermanuals/UM10204_3.pdf (v3 spec)
+# http://en.wikipedia.org/wiki/I2C
+#
+
+# TODO: Look into arbitration, collision detection, clock synchronisation, etc.
+# TODO: Handle clock stretching.
+# TODO: Handle combined messages / repeated START.
+# TODO: Implement support for 7bit and 10bit slave addresses.
+# TODO: Implement support for inverting SDA/SCL levels (0->1 and 1->0).
+# TODO: Implement support for detecting various bus errors.
+
+#
+# I2C output format:
+#
+# The output consists of a (Python) list of I2C "packets", each of which
+# has an (implicit) index number (its index in the list).
+# Each packet consists of a Python dict with certain key/value pairs.
+#
+# TODO: Make this a list later instead of a dict?
+#
+# 'type': (string)
+# - 'S' (START condition)
+# - 'Sr' (Repeated START)
+# - 'AR' (Address, read)
+# - 'AW' (Address, write)
+# - 'DR' (Data, read)
+# - 'DW' (Data, write)
+# - 'P' (STOP condition)
+# 'range': (tuple of 2 integers, the min/max samplenumber of this range)
+# - (min, max)
+# - min/max can also be identical.
+# 'data': (actual data as integer ???) TODO: This can be very variable...
+# 'ann': (string; additional annotations / comments)
+#
+# Example output:
+# [{'type': 'S', 'range': (150, 160), 'data': None, 'ann': 'Foobar'},
+# {'type': 'AW', 'range': (200, 300), 'data': 0x50, 'ann': 'Slave 4'},
+# {'type': 'DW', 'range': (310, 370), 'data': 0x00, 'ann': 'Init cmd'},
+# {'type': 'AR', 'range': (500, 560), 'data': 0x50, 'ann': 'Get stat'},
+# {'type': 'DR', 'range': (580, 640), 'data': 0xfe, 'ann': 'OK'},
+# {'type': 'P', 'range': (650, 660), 'data': None, 'ann': None}]
+#
+# Possible other events:
+# - Error event in case protocol looks broken:
+# [{'type': 'ERROR', 'range': (min, max),
+# 'data': TODO, 'ann': 'This is not a Microchip 24XX64 EEPROM'},
+# [{'type': 'ERROR', 'range': (min, max),
+# 'data': TODO, 'ann': 'TODO'},
+# - TODO: Make list of possible errors accessible as metadata?
+#
+# TODO: I2C address of slaves.
+# TODO: Handle multiple different I2C devices on same bus
+# -> we need to decode multiple protocols at the same time.
+# TODO: range: Always contiguous? Splitted ranges? Multiple per event?
+#
+
+#
+# I2C input format:
+#
+# signals:
+# [[id, channel, description], ...] # TODO
+#
+# Example:
+# {'id': 'SCL', 'ch': 5, 'desc': 'Serial clock line'}
+# {'id': 'SDA', 'ch': 7, 'desc': 'Serial data line'}
+# ...
+#
+# {'inbuf': [...],
+# 'signals': [{'SCL': }]}
+#
+
+def decode(inbuf):
+ """I2C protocol decoder"""
+
+ # FIXME: Get the data in the correct format in the first place.
+ inbuf = [ord(x) for x in inbuf]
+
+ # FIXME: This should be passed in as metadata, not hardcoded here.
+ metadata = {
+ 'numchannels': 8,
+ 'signals': {
+ 'scl': {'ch': 5, 'name': 'SCL', 'desc': 'Serial clock line'},
+ 'sda': {'ch': 7, 'name': 'SDA', 'desc': 'Serial data line'},
+ },
+ }
+
+ out = []
+ o = ack = d = ''
+ bitcount = data = 0
+ wr = startsample = -1
+ IDLE, START, ADDRESS, DATA = range(4)
+ state = IDLE
+
+ # Get the channel/probe number of the SCL/SDA signals.
+ scl_bit = metadata['signals']['scl']['ch']
+ sda_bit = metadata['signals']['sda']['ch']
+
+ # Get SCL/SDA bit values (0/1 for low/high) of the first sample.
+ s = inbuf[0]
+ oldscl = (s & (1 << scl_bit)) >> scl_bit
+ oldsda = (s & (1 << sda_bit)) >> sda_bit
+
+ # Loop over all samples.
+ # TODO: Handle LAs with more/less than 8 channels.
+ for samplenum, s in enumerate(inbuf[1:]): # We skip the first byte...
+ # Get SCL/SDA bit values (0/1 for low/high).
+ scl = (s & (1 << scl_bit)) >> scl_bit
+ sda = (s & (1 << sda_bit)) >> sda_bit
+
+ # TODO: Wait until the bus is idle (SDA = SCL = 1) first?
+
+ # START condition (S): SDA = falling, SCL = high
+ if (oldsda == 1 and sda == 0) and scl == 1:
+ o = {'type': 'S', 'range': (samplenum, samplenum),
+ 'data': None, 'ann': None},
+ out.append(o)
+ state = ADDRESS
+ bitcount = data = 0
+
+ # Data latching by transmitter: SCL = low
+ elif (scl == 0):
+ pass # TODO
+
+ # Data sampling of receiver: SCL = rising
+ elif (oldscl == 0 and scl == 1):
+ if startsample == -1:
+ startsample = samplenum
+ bitcount += 1
+
+ # out.append("%d\t\tRECEIVED BIT %d: %d\n" % \
+ # (samplenum, 8 - bitcount, sda))
+
+ # Address and data are transmitted MSB-first.
+ data <<= 1
+ data |= sda
+
+ if bitcount != 9:
+ continue
+
+ # We received 8 address/data bits and the ACK/NACK bit.
+ data >>= 1 # Shift out unwanted ACK/NACK bit here.
+ ack = (sda == 1) and 'N' or 'A'
+ d = (state == ADDRESS) and (data & 0xfe) or data
+ if state == ADDRESS:
+ wr = (data & 1) and 1 or 0
+ state = DATA
+ o = {'type': state,
+ 'range': (startsample, samplenum - 1),
+ 'data': d, 'ann': None}
+ if state == ADDRESS and wr == 1:
+ o['type'] = 'AW'
+ elif state == ADDRESS and wr == 0:
+ o['type'] = 'AR'
+ elif state == DATA and wr == 1:
+ o['type'] = 'DW'
+ elif state == DATA and wr == 0:
+ o['type'] = 'DR'
+ out.append(o)
+ o = {'type': ack, 'range': (samplenum, samplenum),
+ 'data': None, 'ann': None}
+ out.append(o)
+ bitcount = data = startsample = 0
+ startsample = -1
+
+ # STOP condition (P): SDA = rising, SCL = high
+ elif (oldsda == 0 and sda == 1) and scl == 1:
+ o = {'type': 'P', 'range': (samplenum, samplenum),
+ 'data': None, 'ann': None},
+ out.append(o)
+ state = IDLE
+ wr = -1
+
+ # Save current SDA/SCL values for the next round.
+ oldscl = scl
+ oldsda = sda
+
+ # FIXME: Just for testing...
+ return str(out)
+
+def register():
+ return {
+ 'id': 'i2c',
+ 'name': 'I2C',
+ 'desc': 'Inter-Integrated Circuit (I2C) bus',
+ 'inputformats': ['raw'],
+ 'signalnames': {
+ 'SCL': 'Serial clock line',
+ 'SDA': 'Serial data line',
+ },
+ 'outputformats': ['i2c'],
+ }
+
+# Use psyco (if available) as it results in huge performance improvements.
+try:
+ import psyco
+ psyco.bind(decode)
+except ImportError:
+ pass
+
--- /dev/null
+##
+## This file is part of the sigrok project.
+##
+## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+##
+
+#
+# Nintendo Wii Nunchuk decoder
+#
+
+# TODO: Description
+
+# FIXME: This is just some example input for testing purposes...
+example_packets = [
+ # START condition.
+ {'type': 'S', 'range': (10, 11), 'data': None, 'ann': ''},
+
+ # Nunchuk init: Write 0x40,0x00 to slave address 0x54.
+ {'type': 'AW', 'range': (12, 13), 'data': 0x54, 'ann': ''},
+ {'type': 'DW', 'range': (14, 15), 'data': 0x40, 'ann': ''},
+ {'type': 'AW', 'range': (16, 17), 'data': 0x54, 'ann': ''},
+ {'type': 'DW', 'range': (18, 19), 'data': 0x00, 'ann': ''},
+
+ # Get data: Read 6 bytes of data.
+ {'type': 'DR', 'range': (20, 21), 'data': 0x11, 'ann': ''},
+ {'type': 'DR', 'range': (22, 23), 'data': 0x22, 'ann': ''},
+ {'type': 'DR', 'range': (24, 25), 'data': 0x33, 'ann': ''},
+ {'type': 'DR', 'range': (26, 27), 'data': 0x44, 'ann': ''},
+ {'type': 'DR', 'range': (28, 29), 'data': 0x55, 'ann': ''},
+ {'type': 'DR', 'range': (30, 31), 'data': 0x66, 'ann': ''},
+
+ # STOP condition.
+ {'type': 'P', 'range': (32, 33), 'data': None, 'ann': ''},
+]
+
+def decode(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]
+ out.append(o)
+ state = INITIALIZED
+ else:
+ pass # TODO
+
+ elif p['type'] == 'P':
+ out.append(o)
+ state = INITIALIZED
+ databytecount = 0
+
+ print out
+
+ # FIXME
+ return ''
+
+def register():
+ return {
+ 'id': 'nunchuk',
+ 'name': 'Nunchuk',
+ 'desc': 'Nintendo Wii Nunchuk decoder',
+ 'inputformats': ['i2c'],
+ 'ouputformats': ['nunchuk'],
+ }
+
+# Use psyco (if available) as it results in huge performance improvements.
+try:
+ import psyco
+ psyco.bind(decode)
+except ImportError:
+ pass
+
--- /dev/null
+##
+## This file is part of the sigrok project.
+##
+## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+##
+
+def decode(inbuf):
+ """Counts the low->high and high->low transitions in the specified
+ channel(s) of the signal."""
+
+ outbuf = ''
+
+ # FIXME: Get the data in the correct format in the first place.
+ inbuf = [ord(x) for x in inbuf]
+
+ # TODO: Don't hardcode the number of channels.
+ channels = 8
+
+ oldbit = [0] * channels
+ transitions = [0] * channels
+ rising = [0] * channels
+ falling = [0] * channels
+
+ # Initial values.
+ oldbyte = inbuf[0]
+ for i in range(channels):
+ oldbit[i] = (oldbyte & (1 << i)) >> i
+
+ # Loop over all samples.
+ # TODO: Handle LAs with more/less than 8 channels.
+ for s in inbuf:
+ # Optimization: Skip identical bytes (no transitions).
+ if oldbyte == s:
+ continue
+ for i in range(channels):
+ curbit = (s & (1 << i)) >> i
+ # Optimization: Skip identical bits (no transitions).
+ if oldbit[i] == curbit:
+ continue
+ elif (oldbit[i] == 0 and curbit == 1):
+ rising[i] += 1
+ elif (oldbit[i] == 1 and curbit == 0):
+ falling[i] += 1
+ oldbit[i] = curbit
+ oldbyte = s
+
+ # Total number of transitions is the sum of rising and falling edges.
+ for i in range(channels):
+ transitions[i] = rising[i] + falling[i]
+
+ outbuf += "Rising edges: "
+ for i in range(channels):
+ outbuf += str(rising[i]) + " "
+ outbuf += "\nFalling edges: "
+ for i in range(channels):
+ outbuf += str(falling[i]) + " "
+ outbuf += "\nTransitions: "
+ for i in range(channels):
+ outbuf += str(transitions[i]) + " "
+ outbuf += "\n"
+
+ return outbuf
+
+def register():
+ return {
+ 'id': 'transitioncounter',
+ 'name': 'Transition counter',
+ 'desc': 'Count rising/falling edges',
+ 'inputformats': ['raw'],
+ 'signalnames': {}, # FIXME
+ 'outputformats': ['transitioncounts'],
+ }
+
+# Use psyco (if available) as it results in huge performance improvements.
+try:
+ import psyco
+ psyco.bind(decode)
+except ImportError:
+ pass
+
+++ /dev/null
-##
-## This file is part of the sigrok project.
-##
-## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-##
-
-dist_pkgdata_SCRIPTS = i2c.py nunchuk.py transitioncounter.py
-
-CLEANFILES = *.pyc
-
+++ /dev/null
-##
-## This file is part of the sigrok project.
-##
-## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-##
-
-#
-# I2C protocol decoder
-#
-
-#
-# The Inter-Integrated Circuit (I2C) bus is a bidirectional, multi-master
-# bus using two signals (SCL = serial clock line, SDA = serial data line).
-#
-# There can be many devices on the same bus. Each device can potentially be
-# master or slave (and that can change during runtime). Both slave and master
-# can potentially play the transmitter or receiver role (this can also
-# change at runtime).
-#
-# Possible maximum data rates:
-# - Standard mode: 100 kbit/s
-# - Fast mode: 400 kbit/s
-# - Fast-mode Plus: 1 Mbit/s
-# - High-speed mode: 3.4 Mbit/s
-#
-# START condition (S): SDA = falling, SCL = high
-# Repeated START condition (Sr): same as S
-# STOP condition (P): SDA = rising, SCL = high
-#
-# All data bytes on SDA are exactly 8 bits long (transmitted MSB-first).
-# Each byte has to be followed by a 9th ACK/NACK bit. If that bit is low,
-# that indicates an ACK, if it's high that indicates a NACK.
-#
-# After the first START condition, a master sends the device address of the
-# slave it wants to talk to. Slave addresses are 7 bits long (MSB-first).
-# After those 7 bits, a data direction bit is sent. If the bit is low that
-# indicates a WRITE operation, if it's high that indicates a READ operation.
-#
-# Later an optional 10bit slave addressing scheme was added.
-#
-# Documentation:
-# http://www.nxp.com/acrobat/literature/9398/39340011.pdf (v2.1 spec)
-# http://www.nxp.com/acrobat/usermanuals/UM10204_3.pdf (v3 spec)
-# http://en.wikipedia.org/wiki/I2C
-#
-
-# TODO: Look into arbitration, collision detection, clock synchronisation, etc.
-# TODO: Handle clock stretching.
-# TODO: Handle combined messages / repeated START.
-# TODO: Implement support for 7bit and 10bit slave addresses.
-# TODO: Implement support for inverting SDA/SCL levels (0->1 and 1->0).
-# TODO: Implement support for detecting various bus errors.
-
-#
-# I2C output format:
-#
-# The output consists of a (Python) list of I2C "packets", each of which
-# has an (implicit) index number (its index in the list).
-# Each packet consists of a Python dict with certain key/value pairs.
-#
-# TODO: Make this a list later instead of a dict?
-#
-# 'type': (string)
-# - 'S' (START condition)
-# - 'Sr' (Repeated START)
-# - 'AR' (Address, read)
-# - 'AW' (Address, write)
-# - 'DR' (Data, read)
-# - 'DW' (Data, write)
-# - 'P' (STOP condition)
-# 'range': (tuple of 2 integers, the min/max samplenumber of this range)
-# - (min, max)
-# - min/max can also be identical.
-# 'data': (actual data as integer ???) TODO: This can be very variable...
-# 'ann': (string; additional annotations / comments)
-#
-# Example output:
-# [{'type': 'S', 'range': (150, 160), 'data': None, 'ann': 'Foobar'},
-# {'type': 'AW', 'range': (200, 300), 'data': 0x50, 'ann': 'Slave 4'},
-# {'type': 'DW', 'range': (310, 370), 'data': 0x00, 'ann': 'Init cmd'},
-# {'type': 'AR', 'range': (500, 560), 'data': 0x50, 'ann': 'Get stat'},
-# {'type': 'DR', 'range': (580, 640), 'data': 0xfe, 'ann': 'OK'},
-# {'type': 'P', 'range': (650, 660), 'data': None, 'ann': None}]
-#
-# Possible other events:
-# - Error event in case protocol looks broken:
-# [{'type': 'ERROR', 'range': (min, max),
-# 'data': TODO, 'ann': 'This is not a Microchip 24XX64 EEPROM'},
-# [{'type': 'ERROR', 'range': (min, max),
-# 'data': TODO, 'ann': 'TODO'},
-# - TODO: Make list of possible errors accessible as metadata?
-#
-# TODO: I2C address of slaves.
-# TODO: Handle multiple different I2C devices on same bus
-# -> we need to decode multiple protocols at the same time.
-# TODO: range: Always contiguous? Splitted ranges? Multiple per event?
-#
-
-#
-# I2C input format:
-#
-# signals:
-# [[id, channel, description], ...] # TODO
-#
-# Example:
-# {'id': 'SCL', 'ch': 5, 'desc': 'Serial clock line'}
-# {'id': 'SDA', 'ch': 7, 'desc': 'Serial data line'}
-# ...
-#
-# {'inbuf': [...],
-# 'signals': [{'SCL': }]}
-#
-
-def decode(inbuf):
- """I2C protocol decoder"""
-
- # FIXME: Get the data in the correct format in the first place.
- inbuf = [ord(x) for x in inbuf]
-
- # FIXME: This should be passed in as metadata, not hardcoded here.
- metadata = {
- 'numchannels': 8,
- 'signals': {
- 'scl': {'ch': 5, 'name': 'SCL', 'desc': 'Serial clock line'},
- 'sda': {'ch': 7, 'name': 'SDA', 'desc': 'Serial data line'},
- },
- }
-
- out = []
- o = ack = d = ''
- bitcount = data = 0
- wr = startsample = -1
- IDLE, START, ADDRESS, DATA = range(4)
- state = IDLE
-
- # Get the channel/probe number of the SCL/SDA signals.
- scl_bit = metadata['signals']['scl']['ch']
- sda_bit = metadata['signals']['sda']['ch']
-
- # Get SCL/SDA bit values (0/1 for low/high) of the first sample.
- s = inbuf[0]
- oldscl = (s & (1 << scl_bit)) >> scl_bit
- oldsda = (s & (1 << sda_bit)) >> sda_bit
-
- # Loop over all samples.
- # TODO: Handle LAs with more/less than 8 channels.
- for samplenum, s in enumerate(inbuf[1:]): # We skip the first byte...
- # Get SCL/SDA bit values (0/1 for low/high).
- scl = (s & (1 << scl_bit)) >> scl_bit
- sda = (s & (1 << sda_bit)) >> sda_bit
-
- # TODO: Wait until the bus is idle (SDA = SCL = 1) first?
-
- # START condition (S): SDA = falling, SCL = high
- if (oldsda == 1 and sda == 0) and scl == 1:
- o = {'type': 'S', 'range': (samplenum, samplenum),
- 'data': None, 'ann': None},
- out.append(o)
- state = ADDRESS
- bitcount = data = 0
-
- # Data latching by transmitter: SCL = low
- elif (scl == 0):
- pass # TODO
-
- # Data sampling of receiver: SCL = rising
- elif (oldscl == 0 and scl == 1):
- if startsample == -1:
- startsample = samplenum
- bitcount += 1
-
- # out.append("%d\t\tRECEIVED BIT %d: %d\n" % \
- # (samplenum, 8 - bitcount, sda))
-
- # Address and data are transmitted MSB-first.
- data <<= 1
- data |= sda
-
- if bitcount != 9:
- continue
-
- # We received 8 address/data bits and the ACK/NACK bit.
- data >>= 1 # Shift out unwanted ACK/NACK bit here.
- ack = (sda == 1) and 'N' or 'A'
- d = (state == ADDRESS) and (data & 0xfe) or data
- if state == ADDRESS:
- wr = (data & 1) and 1 or 0
- state = DATA
- o = {'type': state,
- 'range': (startsample, samplenum - 1),
- 'data': d, 'ann': None}
- if state == ADDRESS and wr == 1:
- o['type'] = 'AW'
- elif state == ADDRESS and wr == 0:
- o['type'] = 'AR'
- elif state == DATA and wr == 1:
- o['type'] = 'DW'
- elif state == DATA and wr == 0:
- o['type'] = 'DR'
- out.append(o)
- o = {'type': ack, 'range': (samplenum, samplenum),
- 'data': None, 'ann': None}
- out.append(o)
- bitcount = data = startsample = 0
- startsample = -1
-
- # STOP condition (P): SDA = rising, SCL = high
- elif (oldsda == 0 and sda == 1) and scl == 1:
- o = {'type': 'P', 'range': (samplenum, samplenum),
- 'data': None, 'ann': None},
- out.append(o)
- state = IDLE
- wr = -1
-
- # Save current SDA/SCL values for the next round.
- oldscl = scl
- oldsda = sda
-
- # FIXME: Just for testing...
- return str(out)
-
-def register():
- return {
- 'id': 'i2c',
- 'name': 'I2C',
- 'desc': 'Inter-Integrated Circuit (I2C) bus',
- 'inputformats': ['raw'],
- 'signalnames': {
- 'SCL': 'Serial clock line',
- 'SDA': 'Serial data line',
- },
- 'outputformats': ['i2c'],
- }
-
-# Use psyco (if available) as it results in huge performance improvements.
-try:
- import psyco
- psyco.bind(decode)
-except ImportError:
- pass
-
+++ /dev/null
-##
-## This file is part of the sigrok project.
-##
-## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-##
-
-#
-# Nintendo Wii Nunchuk decoder
-#
-
-# TODO: Description
-
-# FIXME: This is just some example input for testing purposes...
-example_packets = [
- # START condition.
- {'type': 'S', 'range': (10, 11), 'data': None, 'ann': ''},
-
- # Nunchuk init: Write 0x40,0x00 to slave address 0x54.
- {'type': 'AW', 'range': (12, 13), 'data': 0x54, 'ann': ''},
- {'type': 'DW', 'range': (14, 15), 'data': 0x40, 'ann': ''},
- {'type': 'AW', 'range': (16, 17), 'data': 0x54, 'ann': ''},
- {'type': 'DW', 'range': (18, 19), 'data': 0x00, 'ann': ''},
-
- # Get data: Read 6 bytes of data.
- {'type': 'DR', 'range': (20, 21), 'data': 0x11, 'ann': ''},
- {'type': 'DR', 'range': (22, 23), 'data': 0x22, 'ann': ''},
- {'type': 'DR', 'range': (24, 25), 'data': 0x33, 'ann': ''},
- {'type': 'DR', 'range': (26, 27), 'data': 0x44, 'ann': ''},
- {'type': 'DR', 'range': (28, 29), 'data': 0x55, 'ann': ''},
- {'type': 'DR', 'range': (30, 31), 'data': 0x66, 'ann': ''},
-
- # STOP condition.
- {'type': 'P', 'range': (32, 33), 'data': None, 'ann': ''},
-]
-
-def decode(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]
- out.append(o)
- state = INITIALIZED
- else:
- pass # TODO
-
- elif p['type'] == 'P':
- out.append(o)
- state = INITIALIZED
- databytecount = 0
-
- print out
-
- # FIXME
- return ''
-
-def register():
- return {
- 'id': 'nunchuk',
- 'name': 'Nunchuk',
- 'desc': 'Nintendo Wii Nunchuk decoder',
- 'inputformats': ['i2c'],
- 'ouputformats': ['nunchuk'],
- }
-
-# Use psyco (if available) as it results in huge performance improvements.
-try:
- import psyco
- psyco.bind(decode)
-except ImportError:
- pass
-
+++ /dev/null
-##
-## This file is part of the sigrok project.
-##
-## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-##
-
-def decode(inbuf):
- """Counts the low->high and high->low transitions in the specified
- channel(s) of the signal."""
-
- outbuf = ''
-
- # FIXME: Get the data in the correct format in the first place.
- inbuf = [ord(x) for x in inbuf]
-
- # TODO: Don't hardcode the number of channels.
- channels = 8
-
- oldbit = [0] * channels
- transitions = [0] * channels
- rising = [0] * channels
- falling = [0] * channels
-
- # Initial values.
- oldbyte = inbuf[0]
- for i in range(channels):
- oldbit[i] = (oldbyte & (1 << i)) >> i
-
- # Loop over all samples.
- # TODO: Handle LAs with more/less than 8 channels.
- for s in inbuf:
- # Optimization: Skip identical bytes (no transitions).
- if oldbyte == s:
- continue
- for i in range(channels):
- curbit = (s & (1 << i)) >> i
- # Optimization: Skip identical bits (no transitions).
- if oldbit[i] == curbit:
- continue
- elif (oldbit[i] == 0 and curbit == 1):
- rising[i] += 1
- elif (oldbit[i] == 1 and curbit == 0):
- falling[i] += 1
- oldbit[i] = curbit
- oldbyte = s
-
- # Total number of transitions is the sum of rising and falling edges.
- for i in range(channels):
- transitions[i] = rising[i] + falling[i]
-
- outbuf += "Rising edges: "
- for i in range(channels):
- outbuf += str(rising[i]) + " "
- outbuf += "\nFalling edges: "
- for i in range(channels):
- outbuf += str(falling[i]) + " "
- outbuf += "\nTransitions: "
- for i in range(channels):
- outbuf += str(transitions[i]) + " "
- outbuf += "\n"
-
- return outbuf
-
-def register():
- return {
- 'id': 'transitioncounter',
- 'name': 'Transition counter',
- 'desc': 'Count rising/falling edges',
- 'inputformats': ['raw'],
- 'signalnames': {}, # FIXME
- 'outputformats': ['transitioncounts'],
- }
-
-# Use psyco (if available) as it results in huge performance improvements.
-try:
- import psyco
- psyco.bind(decode)
-except ImportError:
- pass
-
projects / libsigrokdecode.git / commitdiff