forked from Ivasoft/DSView
Add 'Maxim DS2408' from libsigrokdecode
This commit is contained in:
Abdelhak Bougouffa
25
libsigrokdecode4DSL/decoders/ds2408/__init__.py
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libsigrokdecode4DSL/decoders/ds2408/__init__.py
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##
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## This file is part of the libsigrokdecode project.
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##
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## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, see <http://www.gnu.org/licenses/>.
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##
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'''
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This decoder stacks on top of the 'onewire_network' PD and decodes the
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Maxim DS2408 1-Wire 8-channel addressable switch protocol.
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'''
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from .pd import Decoder
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129
libsigrokdecode4DSL/decoders/ds2408/pd.py
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libsigrokdecode4DSL/decoders/ds2408/pd.py
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##
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## This file is part of the libsigrokdecode project.
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##
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## Copyright (C) 2019 Mariusz Bialonczyk <manio@skyboo.net>
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, see <http://www.gnu.org/licenses/>.
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##
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import sigrokdecode as srd
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# Dictionary of FUNCTION commands and their names.
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command = {
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0xf0: 'Read PIO Registers',
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0xf5: 'Channel Access Read',
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0x5a: 'Channel Access Write',
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0xcc: 'Write Conditional Search Register',
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0xc3: 'Reset Activity Latches',
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0x3c: 'Disable Test Mode',
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}
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class Decoder(srd.Decoder):
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api_version = 3
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id = 'ds2408'
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name = 'DS2408'
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longname = 'Maxim DS2408'
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desc = '1-Wire 8-channel addressable switch.'
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license = 'gplv2+'
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inputs = ['onewire_network']
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outputs = []
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tags = ['Embedded/industrial', 'IC']
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annotations = (
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('text', 'Human-readable text'),
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)
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def __init__(self):
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self.reset()
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def reset(self):
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# Bytes for function command.
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self.bytes = []
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def start(self):
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self.out_ann = self.register(srd.OUTPUT_ANN)
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def putx(self, data):
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self.put(self.ss, self.es, self.out_ann, data)
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def decode(self, ss, es, data):
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code, val = data
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if code == 'RESET/PRESENCE':
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self.ss, self.es = ss, es
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self.putx([0, ['Reset/presence: %s'
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% ('true' if val else 'false')]])
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self.bytes = []
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elif code == 'ROM':
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self.ss, self.es = ss, es
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family_code = val & 0xff
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self.putx([0, ['ROM: 0x%016x (family code 0x%02x)' % (val, family_code)]])
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self.bytes = []
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elif code == 'DATA':
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self.bytes.append(val)
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if 1 == len(self.bytes):
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self.ss, self.es = ss, es
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if val not in command:
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self.putx([0, ['Unrecognized command: 0x%02x' % val]])
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else:
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self.putx([0, ['%s (0x%02x)' % (command[val], val)]])
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elif 0xf0 == self.bytes[0]: # Read PIO Registers
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if 2 == len(self.bytes):
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self.ss = ss
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elif 3 == len(self.bytes):
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self.es = es
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self.putx([0, ['Target address: 0x%04x'
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% ((self.bytes[2] << 8) + self.bytes[1])]])
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elif 3 < len(self.bytes):
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self.ss, self.es = ss, es
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self.putx([0, ['Data: 0x%02x' % self.bytes[-1]]])
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elif 0xf5 == self.bytes[0]: # Channel Access Read
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if 2 == len(self.bytes):
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self.ss = ss
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elif 2 < len(self.bytes):
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self.ss, self.es = ss, es
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self.putx([0, ['PIO sample: 0x%02x' % self.bytes[-1]]])
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elif 0x5a == self.bytes[0]: # Channel Access Write
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if 2 == len(self.bytes):
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self.ss = ss
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elif 3 == len(self.bytes):
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self.es = es
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if (self.bytes[-1] == (self.bytes[-2] ^ 0xff)):
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self.putx([0, ['Data: 0x%02x (bit-inversion correct: 0x%02x)' % (self.bytes[-2], self.bytes[-1])]])
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else:
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self.putx([0, ['Data error: second byte (0x%02x) is not bit-inverse of first (0x%02x)' % (self.bytes[-1], self.bytes[-2])]])
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elif 3 < len(self.bytes):
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self.ss, self.es = ss, es
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if 0xaa == self.bytes[-1]:
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self.putx([0, ['Success']])
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elif 0xff == self.bytes[-1]:
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self.putx([0, ['Fail New State']])
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elif 0xcc == self.bytes[0]: # Write Conditional Search Register
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if 2 == len(self.bytes):
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self.ss = ss
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elif 3 == len(self.bytes):
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self.es = es
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self.putx([0, ['Target address: 0x%04x'
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% ((self.bytes[2] << 8) + self.bytes[1])]])
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elif 3 < len(self.bytes):
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self.ss, self.es = ss, es
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self.putx([0, ['Data: 0x%02x' % self.bytes[-1]]])
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elif 0xc3 == self.bytes[0]: # Reset Activity Latches
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if 2 == len(self.bytes):
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self.ss = ss
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elif 2 < len(self.bytes):
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self.ss, self.es = ss, es
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if 0xaa == self.bytes[-1]:
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self.putx([0, ['Success']])
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else:
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self.putx([0, ['Invalid byte']])
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