mirror of
https://github.com/DreamSourceLab/DSView.git
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246 lines
9.0 KiB
Python
Executable File
246 lines
9.0 KiB
Python
Executable File
##
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## This file is part of the libsigrokdecode project.
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##
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## Copyright (C) 2015 Jeremy Swanson <jeremy@rakocontrols.com>
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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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from .lists import *
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class SamplerateError(Exception):
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pass
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class Decoder(srd.Decoder):
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api_version = 3
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id = 'dali'
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name = 'DALI'
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longname = 'Digital Addressable Lighting Interface'
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desc = 'Digital Addressable Lighting Interface (DALI) protocol.'
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license = 'gplv2+'
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inputs = ['logic']
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outputs = []
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tags = ['Embedded/industrial', 'Lighting']
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channels = (
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{'id': 'dali', 'name': 'DALI', 'desc': 'DALI data line'},
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)
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options = (
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{'id': 'polarity', 'desc': 'Polarity', 'default': 'active-low',
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'values': ('active-low', 'active-high')},
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)
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annotations = (
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('bit', 'Bit'),
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('startbit', 'Startbit'),
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('sbit', 'Select bit'),
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('ybit', 'Individual or group'),
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('address', 'Address'),
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('command', 'Command'),
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('reply', 'Reply data'),
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('raw', 'Raw data'),
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)
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annotation_rows = (
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('bits', 'Bits', (0,)),
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('raw', 'Raw data', (7,)),
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('fields', 'Fields', (1, 2, 3, 4, 5, 6)),
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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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self.samplerate = None
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self.samplenum = None
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self.edges, self.bits, self.ss_es_bits = [], [], []
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self.state = 'IDLE'
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self.dev_type = None
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def start(self):
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self.out_ann = self.register(srd.OUTPUT_ANN)
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self.old_dali = 1 if self.options['polarity'] == 'active-low' else 0
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def metadata(self, key, value):
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if key == srd.SRD_CONF_SAMPLERATE:
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self.samplerate = value
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# One bit: 833.33us (one half low, one half high).
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# This is how may samples are in 1TE.
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self.halfbit = int((self.samplerate * 0.0008333) / 2.0)
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def putb(self, bit1, bit2, data):
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ss, es = self.ss_es_bits[bit1][0], self.ss_es_bits[bit2][1]
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self.put(ss, es, self.out_ann, data)
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def handle_bits(self, length):
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a, c, f, g, b = 0, 0, 0, 0, self.bits
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# Individual raw bits.
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for i in range(length):
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if i == 0:
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ss = max(0, self.bits[0][0])
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else:
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ss = self.ss_es_bits[i - 1][1]
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es = self.bits[i][0] + (self.halfbit * 2)
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self.ss_es_bits.append([ss, es])
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self.putb(i, i, [0, ['%d' % self.bits[i][1]]])
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# Bits[0:0]: Startbit
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s = ['Startbit: %d' % b[0][1], 'ST: %d' % b[0][1], 'ST', 'S', 'S']
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self.putb(0, 0, [1, s])
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self.putb(0, 0, [7, s])
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# Bits[1:8]
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for i in range(8):
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f |= (b[1 + i][1] << (7 - i))
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if length == 9: # BACKWARD Frame
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s = ['Reply: %02X' % f, 'Rply: %02X' % f,
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'Rep: %02X' % f, 'R: %02X' % f, 'R']
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self.putb(1, 8, [7, s])
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s = ['Reply: %d' % f, 'Rply: %d' % f,
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'Rep: %d' % f, 'R: %d' % f, 'R']
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self.putb(1, 8, [6, s])
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return
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# FORWARD FRAME
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# Bits[9:16]: Command/data (MSB-first)
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for i in range(8):
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c |= (b[9 + i][1] << (7 - i))
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# Raw output
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s = ['Raw data: %02X' % f, 'Raw: %02X' % f,
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'Raw: %02X' % f, 'R: %02X' % f, 'R']
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self.putb(1, 8, [7, s])
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s = ['Raw data: %02X' % c, 'Raw: %02X' % c,
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'Raw: %02X' % c, 'R: %02X' % c, 'R']
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self.putb(9, 16, [7, s])
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# Bits[8:8]: Select bit
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# s = ['Selectbit: %d' % b[8][1], 'SEL: %d' % b[8][1], 'SEL', 'SE', 'S']
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if b[8][1] == 1:
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s = ['Command', 'Comd', 'COM', 'CO', 'C']
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else:
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s = ['Arc Power Level', 'Arc Pwr', 'ARC', 'AC', 'A']
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self.putb(8, 8, [1, s])
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# f &= 254 # Clear the select bit.
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if f >= 254: # BROADCAST
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s = ['BROADCAST', 'Brdcast', 'BC', 'B', 'B']
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self.putb(1, 7, [5, s])
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elif f >= 160: # Extended command 0b10100000
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if f == 0xC1: # DALI_ENABLE_DEVICE_TYPE_X
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self.dev_type = -1
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x = extended_commands.get(f, ['Unknown', 'Unk'])
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s = ['Extended Command: %02X (%s)' % (f, x[0]),
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'XC: %02X (%s)' % (f, x[1]),
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'XC: %02X' % f, 'X: %02X' % f, 'X']
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self.putb(1, 8, [5, s])
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elif f >= 128: # Group
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# Bits[1:1]: Ybit
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s = ['YBit: %d' % b[1][1], 'YB: %d' % b[1][1], 'YB', 'Y', 'Y']
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self.putb(1, 1, [3, s])
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g = (f & 127) >> 1
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s = ['Group address: %d' % g, 'Group: %d' % g,
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'GP: %d' % g, 'G: %d' % g, 'G']
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self.putb(2,7, [4, s])
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else: # Short address
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# Bits[1:1]: Ybit
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s = ['YBit: %d' % b[1][1], 'YB: %d' % b[1][1], 'YB', 'Y', 'Y']
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self.putb(1, 1, [3, s])
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a = f >> 1
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s = ['Short address: %d' % a, 'Addr: %d' % a,
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'Addr: %d' % a, 'A: %d' % a, 'A']
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self.putb(2, 7, [4, s])
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# Bits[9:16]: Command/data (MSB-first)
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if f >= 160 and f < 254:
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if self.dev_type == -1:
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self.dev_type = c
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s = ['Type: %d' % c, 'Typ: %d' % c,
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'Typ: %d' % c, 'T: %d' % c, 'D']
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else:
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self.dev_type = None
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s = ['Data: %d' % c, 'Dat: %d' % c,
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'Dat: %d' % c, 'D: %d' % c, 'D']
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elif b[8][1] == 1:
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un = c & 0xF0
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ln = c & 0x0F
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if un == 0x10: # Set scene command
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x = ['Recall Scene %d' % ln, 'SC %d' % ln]
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elif un == 0x40:
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x = ['Store DTR as Scene %d' % ln, 'SC %d = DTR' % ln]
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elif un == 0x50:
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x = ['Delete Scene %d' % ln, 'DEL SC %d' % ln]
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elif un == 0x60:
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x = ['Add to Group %d' % ln, 'Grp %d Add' % ln]
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elif un == 0x70:
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x = ['Remove from Group %d' % ln, 'Grp %d Del' % ln]
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elif un == 0xB0:
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x = ['Query Scene %d Level' % ln, 'Sc %d Level' % ln]
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elif c >= 224: # Application specific commands
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if self.dev_type == 8:
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x = dali_device_type8.get(c, ['Unknown App', 'Unk'])
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else:
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x = ['Application Specific Command %d' % c, 'App Cmd %d' % c]
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else:
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x = dali_commands.get(c, ['Unknown', 'Unk'])
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s = ['Command: %d (%s)' % (c, x[0]), 'Com: %d (%s)' % (c, x[1]),
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'Com: %d' % c, 'C: %d' % c, 'C']
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else:
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s = ['Arc Power Level: %d' % c, 'Level: %d' % c,
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'Lev: %d' % c, 'L: %d' % c, 'L']
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self.putb(9, 16, [5, s])
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def reset_decoder_state(self):
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self.edges, self.bits, self.ss_es_bits = [], [], []
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self.state = 'IDLE'
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def decode(self):
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if not self.samplerate:
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raise SamplerateError('Cannot decode without samplerate.')
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bit = 0
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while True:
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# TODO: Come up with more appropriate self.wait() conditions.
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(dali,) = self.wait()
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if self.options['polarity'] == 'active-high':
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dali ^= 1 # Invert.
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# State machine.
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if self.state == 'IDLE':
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# Wait for any edge (rising or falling).
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if self.old_dali == dali:
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continue
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self.edges.append(self.samplenum)
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self.state = 'PHASE0'
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self.old_dali = dali
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continue
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if self.old_dali != dali:
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self.edges.append(self.samplenum)
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elif self.samplenum == (self.edges[-1] + int(self.halfbit * 1.5)):
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self.edges.append(self.samplenum - int(self.halfbit * 0.5))
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else:
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continue
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bit = self.old_dali
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if self.state == 'PHASE0':
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self.phase0 = bit
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self.state = 'PHASE1'
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elif self.state == 'PHASE1':
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if (bit == 1) and (self.phase0 == 1): # Stop bit.
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if len(self.bits) == 17 or len(self.bits) == 9:
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# Forward or Backward.
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self.handle_bits(len(self.bits))
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self.reset_decoder_state() # Reset upon errors.
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continue
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else:
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self.bits.append([self.edges[-3], bit])
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self.state = 'PHASE0'
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self.old_dali = dali
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