X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=decoders%2Fi2cdemux%2Fi2cdemux.py;fp=decoders%2Fi2cdemux%2Fi2cdemux.py;h=0000000000000000000000000000000000000000;hb=24c74fd30fb161837c5f8b01baf3c0fe2dfa4ed5;hp=bb47f230a66f0ec834a7381fb87ee4baaf3a5d81;hpb=23f999aa996e54cd73cb54d5e254d1445d65847d;p=libsigrokdecode.git diff --git a/decoders/i2cdemux/i2cdemux.py b/decoders/i2cdemux/i2cdemux.py deleted file mode 100644 index bb47f23..0000000 --- a/decoders/i2cdemux/i2cdemux.py +++ /dev/null @@ -1,87 +0,0 @@ -## -## This file is part of the sigrok project. -## -## Copyright (C) 2012 Uwe Hermann -## -## 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 -## - -# Generic I2C demultiplexing protocol decoder - -import sigrokdecode as srd - -class Decoder(srd.Decoder): - api_version = 1 - id = 'i2cdemux' - name = 'I2C demux' - longname = 'I2C demultiplexer' - desc = 'Demux I2C packets into per-slave-address streams.' - license = 'gplv2+' - inputs = ['i2c'] - outputs = [] # TODO: Only known at run-time. - probes = [] - optional_probes = [] - options = {} - annotations = [] - - def __init__(self, **kwargs): - self.packets = [] # Local cache of I2C packets - self.slaves = [] # List of known slave addresses - self.stream = -1 # Current output stream - self.streamcount = 0 # Number of created output streams - - def start(self, metadata): - self.out_proto = [] - - def report(self): - pass - - # Grab I2C packets into a local cache, until an I2C STOP condition - # packet comes along. At some point before that STOP condition, there - # will have been an ADDRESS READ or ADDRESS WRITE which contains the - # I2C address of the slave that the master wants to talk to. - # We use this slave address to figure out which output stream should - # get the whole chunk of packets (from START to STOP). - def decode(self, ss, es, data): - - cmd, databyte = data - - # Add the I2C packet to our local cache. - self.packets.append([ss, es, data]) - - if cmd in ('ADDRESS READ', 'ADDRESS WRITE'): - if databyte in self.slaves: - self.stream = self.slaves.index(databyte) - return - - # We're never seen this slave, add a new stream. - self.slaves.append(databyte) - self.out_proto.append(self.add(srd.OUTPUT_PROTO, - 'i2c-%s' % hex(databyte))) - self.stream = self.streamcount - self.streamcount += 1 - elif cmd == 'STOP': - if self.stream == -1: - raise Exception('Invalid stream!') # FIXME? - - # Send the whole chunk of I2C packets to the correct stream. - for p in self.packets: - self.put(p[0], p[1], self.out_proto[self.stream], p[2]) - - self.packets = [] - self.stream = -1 - else: - pass # Do nothing, only add the I2C packet to our cache. -