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##
## 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 *
from .IrmpPythonWrap import IrmpWrap
class SamplerateError(Exception):
pass
class Decoder(srd.Decoder):
api_version = 3
id = 'ir_irmp'
name = 'IR IRMP'
longname = 'IR IRMP multi protocol decoder'
desc = 'IRMP - multi protocol infrared decoder with support for many IR protocols by Frank M. (ukw)'
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')},
#
# {'id': 'cd_freq', 'desc': 'Carrier Frequency', 'default': 0},
)
annotations = (
('packet', 'Packet'),
('debug', 'Debug'),
)
annotation_rows = (
('packets', 'IR Packets', (0,)),
('debug', 'Debug', (1,)),
)
irmp = IrmpWrap()
def putIr(self, data):
ss = data['start'] * self.subSample
es = data['end'] * self.subSample
ad = data['data']['address']
pr = data['data']['protocol']
pn = data['data']['protocolName']
cm = data['data']['command']
repeat = data['data']['repeat']
# print(f" {self.samplenum} {ss} - {es} ({data['start']} - {data['end']})")
self.put(ss, es, self.out_ann,
[0, [ f"Protocol: {pn} ({pr}), Address 0x{ad:04x}, Command: 0x{cm:04x} {'repeated' if repeat else ''}",
f"P: {pn} ({pr}), Ad: 0x{ad:x}, Cmd: 0x{cm:x} {'rep' if repeat else ''}",
f"P: {pr} A: 0x{ad:x} C: 0x{cm:x} {'rep' if repeat else ''}",
f"C:{cm:x} A:{ad:x} {'r' if repeat else ''}",
f"C:{cm:x}",
]])
def __init__(self):
self.irmp = Decoder.irmp
self.reset()
def reset(self):
self.irmp.Reset()
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.samplerate:
raise SamplerateError('Cannot decode without samplerate.')
if (self.samplerate % self.irmp.GetSampleRate()) != 0:
raise SamplerateError(f'samplerate has to be multple of {self.irmp.GetSampleRate()}' )
self.subSample = int(self.samplerate / self.irmp.GetSampleRate())
sampleSkip = self.subSample
#self.reset()
#print (f" startdecode: samplenum {self.samplenum} rate: {self.samplerate} subsample {self.subSample}")
# cd_count = None
# if self.options['cd_freq']:
# cd_count = int(self.samplerate / self.options['cd_freq']) + 1
self.active = 0 if self.options['polarity'] == 'active-low' else 1
(ir,) = self.wait([{'skip' : sampleSkip}])
i = 0
while True:
##### todo: check if ir carrier frequency detection can be used
#
# Detect changes in the presence of an active input signal.
# The decoder can either be fed an already filtered RX signal
# or optionally can detect the presence of a carrier. Periods
# of inactivity (signal changes slower than the carrier freq,
# if specified) pass on the most recently sampled level. This
# approach works for filtered and unfiltered input alike, and
# only slightly extends the active phase of input signals with
# carriers included by one period of the carrier frequency.
# IR based communication protocols can cope with this slight
# inaccuracy just fine by design. Enabling carrier detection
# on already filtered signals will keep the length of their
# active period, but will shift their signal changes by one
# carrier period before they get passed to decoding logic.
# if cd_count:
# (cur_ir,) = self.wait([{0: 'e'}, {'skip': cd_count}])
# if self.matched[0]:
# cur_ir = self.active
# if cur_ir == prev_ir:
# continue
# prev_ir = cur_ir
# self.ir = cur_ir
# else:
# (self.ir,) = self.wait({0: 'e'})
#
#print (f"samplenum {self.samplenum}")
#if i%100 == 0:
# self.put(self.samplenum, self.samplenum+10, self.out_ann,
# [1, [ f"{self.samplenum} - {i}",]])
if self.active == 1:
ir = 1 - ir
if self.irmp.AddSample(ir):
data = self.irmp.GetData()
self.putIr(data)
i = i + 1
(ir,) = self.wait([{'skip' : sampleSkip}])
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