diff options
Diffstat (limited to 'decoders/rc_encode')
| -rw-r--r-- | decoders/rc_encode/__init__.py | 36 | ||||
| -rw-r--r-- | decoders/rc_encode/pd.py | 159 |
2 files changed, 195 insertions, 0 deletions
diff --git a/decoders/rc_encode/__init__.py b/decoders/rc_encode/__init__.py new file mode 100644 index 0000000..db78dc1 --- /dev/null +++ b/decoders/rc_encode/__init__.py @@ -0,0 +1,36 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2018 Steve R <steversig@virginmedia.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/>. +## + +''' +This PD decodes the remote control protocol which is frequently used +within key fobs and power socket remotes. + +They contain encoding chips like the PT2262 which converts the button +pressed and address settings into a series of pulses which is then +transmitted over whatever frequency and modulation that the designer +chooses. These devices operate at a number of frequencies including 433MHz. + +This PD should also decode the HX2262 and SC5262 which are equivalents. + +The decoder also contains some additional decoding for a Maplin L95AR +remote control and will turn the received signal into which button was +pressed and what the address code DIP switches are set to. +''' + +from .pd import Decoder diff --git a/decoders/rc_encode/pd.py b/decoders/rc_encode/pd.py new file mode 100644 index 0000000..ec0cb99 --- /dev/null +++ b/decoders/rc_encode/pd.py @@ -0,0 +1,159 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2018 Steve R <steversig@virginmedia.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 + +def decode_bit(edges): + # Datasheet says long pulse is 3 times short pulse. + lmin = 2 # long min multiplier + lmax = 5 # long max multiplier + eqmin = 0.5 # equal min multiplier + eqmax = 1.5 # equal max multiplier + if ( # 0 -___-___ + (int(edges[1]) >= int(edges[0]) * lmin and int(edges[1]) <= int(edges[0]) * lmax) and + (int(edges[2]) >= int(edges[0]) * eqmin and int(edges[2]) <= int(edges[0]) * eqmax) and + (int(edges[3]) >= int(edges[0]) * lmin and int(edges[3]) <= int(edges[0]) * lmax)): + return '0' + elif ( # 1 ---_---_ + (int(edges[0]) >= int(edges[1]) * lmin and int(edges[0]) <= int(edges[1]) * lmax) and + (int(edges[0]) >= int(edges[2]) * eqmin and int(edges[0]) <= int(edges[2]) * eqmax) and + (int(edges[0]) >= int(edges[3]) * lmin and int(edges[0]) <= int(edges[3]) * lmax)): + return '1' + elif ( # float ---_-___ + (int(edges[1]) >= int(edges[0]) * lmin and int(edges[1]) <= int(edges[0]) * lmax) and + (int(edges[2]) >= int(edges[0]) * lmin and int(edges[2]) <= int(edges[0]) * lmax) and + (int(edges[3]) >= int(edges[0]) * eqmin and int(edges[3]) <= int(edges[0]) * eqmax)): + return 'f' + else: + return 'U' + +def pinlabels(bit_count): + if bit_count <= 6: + return 'A%i' % (bit_count - 1) + else: + return 'A%i/D%i' % (bit_count - 1, 12 - bit_count) + +def decode_model(model, bits): + if model == 'maplin_l95ar': + address = 'Addr' # Address pins A0 to A5 + for i in range(0, 6): + address = address + ' %i:' % (i + 1) + \ + ('on' if bits[i][0] == '0' else 'off') + button = 'Button' + # Button pins A6/D5 to A11/D0 + if bits[6][0] == '0' and bits[11][0] == '0': + button = button + ' A ON/OFF' + elif bits[7][0] == '0' and bits[11][0] == '0': + button = button + ' B ON/OFF' + elif bits[9][0] == '0' and bits[11][0] == '0': + button = button + ' C ON/OFF' + elif bits[8][0] == '0' and bits[11][0] == '0': + button = button + ' D ON/OFF' + else: + button = button + ' Unknown' + return ['%s' % address, bits[0][1], bits[5][2], \ + '%s' % button, bits[6][1], bits[11][2]] + +class Decoder(srd.Decoder): + api_version = 3 + id = 'rc_encode' + name = 'RC encode' + longname = 'Remote control encoder' + desc = 'PT2262/HX2262/SC5262 remote control encoder protocol.' + license = 'gplv2+' + inputs = ['logic'] + outputs = [] + channels = ( + {'id': 'data', 'name': 'Data', 'desc': 'Data line'}, + ) + annotations = ( + ('bits', 'Bits'), + ('pins', 'Pins'), + ('remote', 'Remote'), + ) + annotation_rows = ( + ('bits', 'Bits', (0,)), + ('pins', 'Pins', (1,)), + ('remote', 'Remote', (2,)), + ) + options = ( + {'id': 'remote', 'desc': 'Remote', 'default': 'none', + 'values': ('none', 'maplin_l95ar')}, + ) + + def __init__(self): + self.reset() + + def reset(self): + self.samplenumber_last = None + self.pulses = [] + self.bits = [] + self.labels = [] + self.bit_count = 0 + self.bit_first = None + self.bit_last = None + self.state = 'IDLE' + + def start(self): + self.out_ann = self.register(srd.OUTPUT_ANN) + self.model = self.options['remote'] + + def decode(self): + while True: + pin = self.wait({0: 'e'}) + self.state = 'DECODING' + + if not self.samplenumber_last: # Set counters to start of signal. + self.samplenumber_last = self.samplenum + self.bit_first = self.samplenum + continue + + if self.bit_count < 12: # Decode A0 to A11. + self.bit_count += 1 + for i in range(0, 4): # Get four pulses for each bit. + if i > 0: + pin = self.wait({0: 'e'}) # Get next 3 edges. + samples = self.samplenum - self.samplenumber_last + self.pulses.append(samples) # Save the pulse width. + self.samplenumber_last = self.samplenum + self.bit_last = self.samplenum + self.bits.append([decode_bit(self.pulses), self.bit_first, + self.bit_last]) # Save states and times. + self.put(self.bit_first, self.bit_last, self.out_ann, + [0, [decode_bit(self.pulses)]]) # Write decoded bit. + self.put(self.bit_first, self.bit_last, self.out_ann, + [1, [pinlabels(self.bit_count)]]) # Write pin labels. + self.pulses = [] + self.bit_first = self.samplenum + else: + if self.model != 'none': + self.labels = decode_model(self.model, self.bits) + self.put(self.labels[1], self.labels[2], self.out_ann, + [2, [self.labels[0]]]) # Write model decode. + self.put(self.labels[4], self.labels[5], self.out_ann, + [2, [self.labels[3]]]) # Write model decode. + samples = self.samplenum - self.samplenumber_last + pin = self.wait({'skip': 8 * samples}) # Wait for end of sync bit. + self.bit_last = self.samplenum + self.put(self.bit_first, self.bit_last, self.out_ann, + [0, ['Sync']]) # Write sync label. + self.reset() # Reset and wait for next set of pulses. + self.state = 'DECODE_TIMEOUT' + if not self.state == 'DECODE_TIMEOUT': + self.samplenumber_last = self.samplenum |