X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=blobdiff_plain;f=decoders%2Fonewire_network%2Fonewire_network.py;fp=decoders%2Fonewire_network%2Fonewire_network.py;h=0000000000000000000000000000000000000000;hp=ab11ea4436b4ce0f5db82caec843e794d95e8827;hb=24c74fd30fb161837c5f8b01baf3c0fe2dfa4ed5;hpb=23f999aa996e54cd73cb54d5e254d1445d65847d diff --git a/decoders/onewire_network/onewire_network.py b/decoders/onewire_network/onewire_network.py deleted file mode 100644 index ab11ea4..0000000 --- a/decoders/onewire_network/onewire_network.py +++ /dev/null @@ -1,190 +0,0 @@ -## -## This file is part of the sigrok project. -## -## Copyright (C) 2012 Iztok Jeras -## -## 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 -## - -# 1-Wire protocol decoder (network layer) - -import sigrokdecode as srd - -# Dictionary of ROM commands and their names, next state. -command = { - 0x33: ['Read ROM' , 'GET ROM' ], - 0x0f: ['Conditional read ROM' , 'GET ROM' ], - 0xcc: ['Skip ROM' , 'TRANSPORT' ], - 0x55: ['Match ROM' , 'GET ROM' ], - 0xf0: ['Search ROM' , 'SEARCH ROM'], - 0xec: ['Conditional search ROM', 'SEARCH ROM'], - 0x3c: ['Overdrive skip ROM' , 'TRANSPORT' ], - 0x69: ['Overdrive match ROM' , 'GET ROM' ], -} - -class Decoder(srd.Decoder): - api_version = 1 - id = 'onewire_network' - name = '1-Wire network layer' - longname = '1-Wire serial communication bus (network layer)' - desc = 'Bidirectional, half-duplex, asynchronous serial bus.' - license = 'gplv2+' - inputs = ['onewire_link'] - outputs = ['onewire_network'] - probes = [] - optional_probes = [] - options = {} - annotations = [ - ['Text', 'Human-readable text'], - ] - - def __init__(self, **kwargs): - self.beg = 0 - self.end = 0 - self.state = 'COMMAND' - self.bit_cnt = 0 - self.search = 'P' - self.data_p = 0x0 - self.data_n = 0x0 - self.data = 0x0 - self.rom = 0x0000000000000000 - - def start(self, metadata): - self.out_proto = self.add(srd.OUTPUT_PROTO, 'onewire_network') - self.out_ann = self.add(srd.OUTPUT_ANN, 'onewire_network') - - def report(self): - pass - - def putx(self, data): - # Helper function for most annotations. - self.put(self.beg, self.end, self.out_ann, data) - - def puty(self, data): - # Helper function for most protocol packets. - self.put(self.beg, self.end, self.out_proto, data) - - def decode(self, ss, es, data): - code, val = data - - # State machine. - if code == 'RESET/PRESENCE': - self.search = 'P' - self.bit_cnt = 0 - self.put(ss, es, self.out_ann, - [0, ['Reset/presence: %s' % ('true' if val else 'false')]]) - self.put(ss, es, self.out_proto, ['RESET/PRESENCE', val]) - self.state = 'COMMAND' - return - - # For now we're only interested in 'RESET/PRESENCE' and 'BIT' packets. - if code != 'BIT': - return - - if self.state == 'COMMAND': - # Receiving and decoding a ROM command. - if self.onewire_collect(8, val, ss, es) == 0: - return - if self.data in command: - self.putx([0, ['ROM command: 0x%02x \'%s\'' - % (self.data, command[self.data][0])]]) - self.state = command[self.data][1] - else: - self.putx([0, ['ROM command: 0x%02x \'%s\'' - % (self.data, 'unrecognized')]]) - self.state = 'COMMAND ERROR' - elif self.state == 'GET ROM': - # A 64 bit device address is selected. - # Family code (1 byte) + serial number (6 bytes) + CRC (1 byte) - if self.onewire_collect(64, val, ss, es) == 0: - return - self.rom = self.data & 0xffffffffffffffff - self.putx([0, ['ROM: 0x%016x' % self.rom]]) - self.puty(['ROM', self.rom]) - self.state = 'TRANSPORT' - elif self.state == 'SEARCH ROM': - # A 64 bit device address is searched for. - # Family code (1 byte) + serial number (6 bytes) + CRC (1 byte) - if self.onewire_search(64, val, ss, es) == 0: - return - self.rom = self.data & 0xffffffffffffffff - self.putx([0, ['ROM: 0x%016x' % self.rom]]) - self.puty(['ROM', self.rom]) - self.state = 'TRANSPORT' - elif self.state == 'TRANSPORT': - # The transport layer is handled in byte sized units. - if self.onewire_collect(8, val, ss, es) == 0: - return - self.putx([0, ['Data: 0x%02x' % self.data]]) - self.puty(['DATA', self.data]) - elif self.state == 'COMMAND ERROR': - # Since the command is not recognized, print raw data. - if self.onewire_collect(8, val, ss, es) == 0: - return - self.putx([0, ['ROM error data: 0x%02x' % self.data]]) - else: - raise Exception('Invalid state: %s' % self.state) - - # Data collector. - def onewire_collect(self, length, val, ss, es): - # Storing the sample this sequence begins with. - if self.bit_cnt == 1: - self.beg = ss - self.data = self.data & ~(1 << self.bit_cnt) | (val << self.bit_cnt) - self.bit_cnt += 1 - # Storing the sample this sequence ends with. - # In case the full length of the sequence is received, return 1. - if self.bit_cnt == length: - self.end = es - self.data = self.data & ((1 << length) - 1) - self.bit_cnt = 0 - return 1 - else: - return 0 - - # Search collector. - def onewire_search(self, length, val, ss, es): - # Storing the sample this sequence begins with. - if (self.bit_cnt == 0) and (self.search == 'P'): - self.beg = ss - - if self.search == 'P': - # Master receives an original address bit. - self.data_p = self.data_p & ~(1 << self.bit_cnt) | \ - (val << self.bit_cnt) - self.search = 'N' - elif self.search == 'N': - # Master receives a complemented address bit. - self.data_n = self.data_n & ~(1 << self.bit_cnt) | \ - (val << self.bit_cnt) - self.search = 'D' - elif self.search == 'D': - # Master transmits an address bit. - self.data = self.data & ~(1 << self.bit_cnt) | (val << self.bit_cnt) - self.search = 'P' - self.bit_cnt += 1 - - # Storing the sample this sequence ends with. - # In case the full length of the sequence is received, return 1. - if self.bit_cnt == length: - self.end = es - self.data_p = self.data_p & ((1 << length) - 1) - self.data_n = self.data_n & ((1 << length) - 1) - self.data = self.data & ((1 << length) - 1) - self.search = 'P' - self.bit_cnt = 0 - return 1 - else: - return 0