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##
## This file is part of the libsigrokdecode project.
##
## Copyright (C) 2014 Gump Yang <gump.yang@gmail.com>
## Copyright (C) 2019 Rene Staffen
## Copyright (C) 2020-2021 Gerhard Sittig <gerhard.sittig@gmx.net>
##
## 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/>.
##
from . import irmp_library
import sigrokdecode as srd
class SamplerateError(Exception):
pass
class LibraryError(Exception):
pass
class Decoder(srd.Decoder):
api_version = 3
id = 'ir_irmp'
name = 'IR IRMP'
longname = 'IR IRMP'
desc = 'IRMP infrared remote control multi protocol.'
license = 'gplv2+'
inputs = ['logic']
outputs = []
tags = ['IR']
channels = (
{'id': 'ir', 'name': 'IR', 'desc': 'Data line'},
)
options = (
{'id': 'polarity', 'desc': 'Polarity', 'default': 'active-low',
'values': ('active-low', 'active-high')},
)
annotations = (
('packet', 'Packet'),
)
annotation_rows = (
('packets', 'IR Packets', (0,)),
)
def putframe(self, data):
'''Emit annotation for an IR frame.'''
# Cache result data fields in local variables. Get the ss/es
# timestamps, scaled to sample numbers.
nr = data['proto_nr']
name = data['proto_name']
addr = data['address']
cmd = data['command']
repeat = data['repeat']
release = data['release']
ss = data['start'] * self.rate_factor
es = data['end'] * self.rate_factor
# Prepare display texts for several zoom levels.
# Implementor's note: Keep list lengths for flags aligned during
# maintenance. Make sure there are as many flags text variants
# as are referenced by annotation text variants. Differing list
# lengths or dynamic refs will severely complicate the logic.
rep_txts = ['repeat', 'rep', 'r']
rel_txts = ['release', 'rel', 'R']
flag_txts = [None,] * len(rep_txts)
for zoom in range(len(flag_txts)):
flag_txts[zoom] = []
if repeat:
flag_txts[zoom].append(rep_txts[zoom])
if release:
flag_txts[zoom].append(rel_txts[zoom])
flag_txts = [' '.join(t) or '-' for t in flag_txts]
flg = flag_txts # Short name for .format() references.
txts = [
'Protocol: {name} ({nr}), Address 0x{addr:04x}, Command: 0x{cmd:04x}, Flags: {flg[0]}'.format(**locals()),
'P: {name} ({nr}), Addr: 0x{addr:x}, Cmd: 0x{cmd:x}, Flg: {flg[1]}'.format(**locals()),
'P: {nr} A: 0x{addr:x} C: 0x{cmd:x} F: {flg[1]}'.format(**locals()),
'C:{cmd:x} A:{addr:x} {flg[2]}'.format(**locals()),
'C:{cmd:x}'.format(**locals()),
]
# Emit the annotation from details which were constructed above.
self.put(ss, es, self.out_ann, [0, txts])
def __init__(self):
self.irmp = None
self.reset()
def reset(self):
pass
def start(self):
self.out_ann = self.register(srd.OUTPUT_ANN)
def metadata(self, key, value):
if key == srd.SRD_CONF_SAMPLERATE:
self.samplerate = value
def decode(self):
if not self.irmp:
try:
self.irmp = irmp_library.IrmpLibrary()
except Exception as e:
txt = e.args[0]
raise LibraryError(txt)
if not self.irmp:
raise LibraryError('Cannot access IRMP library.')
if not self.samplerate:
raise SamplerateError('Cannot decode without samplerate.')
lib_rate = self.irmp.get_sample_rate()
if not lib_rate:
raise LibraryError('Cannot determine IRMP library\'s samplerate.')
if self.samplerate % lib_rate:
raise SamplerateError('Capture samplerate must be multiple of library samplerate ({})'.format(lib_rate))
self.rate_factor = int(self.samplerate / lib_rate)
active = 0 if self.options['polarity'] == 'active-low' else 1
ir, = self.wait()
with self.irmp:
self.irmp.reset_state()
while True:
if active == 1:
ir = 1 - ir
if self.irmp.add_one_sample(ir):
data = self.irmp.get_result_data()
self.putframe(data)
ir, = self.wait([{'skip': self.rate_factor}])
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