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