X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=decoders%2Fir_nec%2Fpd.py;h=05c8c006655797ccf03b323f6cb92660f4e61dda;hb=85f616edfa157ae6ed8ea9ea4a72b930816e4dc9;hp=faeeb091c2993b6a25c20d320170ed5f829427d9;hpb=73fc79e094855b616fb6d6e392a87338ffe37a6b;p=libsigrokdecode.git diff --git a/decoders/ir_nec/pd.py b/decoders/ir_nec/pd.py index faeeb09..05c8c00 100644 --- a/decoders/ir_nec/pd.py +++ b/decoders/ir_nec/pd.py @@ -14,37 +14,64 @@ ## 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, write to the Free Software -## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +## along with this program; if not, see . ## +from common.srdhelper import bitpack +from .lists import * import sigrokdecode as srd +class SamplerateError(Exception): + pass + +class Pin: + IR, = range(1) + +class Ann: + BIT, AGC, LONG_PAUSE, SHORT_PAUSE, STOP_BIT, \ + LEADER_CODE, ADDR, ADDR_INV, CMD, CMD_INV, REPEAT_CODE, \ + REMOTE, WARN = range(13) + class Decoder(srd.Decoder): - api_version = 1 + api_version = 3 id = 'ir_nec' name = 'IR NEC' longname = 'IR NEC' desc = 'NEC infrared remote control protocol.' license = 'gplv2+' inputs = ['logic'] - outputs = ['ir_nec'] - probes = [ + outputs = [] + tags = ['IR'] + channels = ( {'id': 'ir', 'name': 'IR', 'desc': 'Data line'}, - ] - optional_probes = [] - options = { - 'polarity': ['Polarity', 'active-low'], - } - annotations = [ - ['bit', 'Bit'], - ['lc', 'Leader code'], - ['info', 'Info'], - ['error', 'Error'], - ] + ) + options = ( + {'id': 'polarity', 'desc': 'Polarity', 'default': 'active-low', + 'values': ('active-low', 'active-high')}, + {'id': 'cd_freq', 'desc': 'Carrier Frequency', 'default': 0}, + {'id': 'extended', 'desc': 'Extended NEC Protocol', + 'default': 'no', 'values': ('yes', 'no')}, + ) + annotations = ( + ('bit', 'Bit'), + ('agc-pulse', 'AGC pulse'), + ('longpause', 'Long pause'), + ('shortpause', 'Short pause'), + ('stop-bit', 'Stop bit'), + ('leader-code', 'Leader code'), + ('addr', 'Address'), + ('addr-inv', 'Address#'), + ('cmd', 'Command'), + ('cmd-inv', 'Command#'), + ('repeat-code', 'Repeat code'), + ('remote', 'Remote'), + ('warning', 'Warning'), + ) annotation_rows = ( - ('bits', 'Bits', (0,)), - ('fields', 'Fields', (1, 2, 3)), + ('bits', 'Bits', (Ann.BIT, Ann.AGC, Ann.LONG_PAUSE, Ann.SHORT_PAUSE, Ann.STOP_BIT)), + ('fields', 'Fields', (Ann.LEADER_CODE, Ann.ADDR, Ann.ADDR_INV, Ann.CMD, Ann.CMD_INV, Ann.REPEAT_CODE)), + ('remote-vals', 'Remote', (Ann.REMOTE,)), + ('warnings', 'Warnings', (Ann.WARN,)), ) def putx(self, data): @@ -53,83 +80,203 @@ class Decoder(srd.Decoder): def putb(self, data): self.put(self.ss_bit, self.samplenum, self.out_ann, data) - def __init__(self, **kwargs): + def putd(self, data, bit_count): + name = self.state.title() + d = {'ADDRESS': Ann.ADDR, 'ADDRESS#': Ann.ADDR_INV, + 'COMMAND': Ann.CMD, 'COMMAND#': Ann.CMD_INV} + s = {'ADDRESS': ['ADDR', 'A'], 'ADDRESS#': ['ADDR#', 'A#'], + 'COMMAND': ['CMD', 'C'], 'COMMAND#': ['CMD#', 'C#']} + fmt = '{{}}: 0x{{:0{}X}}'.format(bit_count // 4) + self.putx([d[self.state], [ + fmt.format(name, data), + fmt.format(s[self.state][0], data), + fmt.format(s[self.state][1], data), + s[self.state][1], + ]]) + + def putstop(self, ss): + self.put(ss, ss + self.stop, self.out_ann, + [Ann.STOP_BIT, ['Stop bit', 'Stop', 'St', 'S']]) + + def putpause(self, p): + self.put(self.ss_start, self.ss_other_edge, self.out_ann, + [Ann.AGC, ['AGC pulse', 'AGC', 'A']]) + idx = Ann.LONG_PAUSE if p == 'Long' else Ann.SHORT_PAUSE + self.put(self.ss_other_edge, self.samplenum, self.out_ann, [idx, [ + '{} pause'.format(p), + '{}-pause'.format(p[0]), + '{}P'.format(p[0]), + 'P', + ]]) + + def putremote(self): + dev = address.get(self.addr, 'Unknown device') + buttons = command.get(self.addr, {}) + btn = buttons.get(self.cmd, ['Unknown', 'Unk']) + self.put(self.ss_remote, self.ss_bit + self.stop, self.out_ann, [Ann.REMOTE, [ + '{}: {}'.format(dev, btn[0]), + '{}: {}'.format(dev, btn[1]), + '{}'.format(btn[1]), + ]]) + + def __init__(self): + self.reset() + + def reset(self): self.state = 'IDLE' - self.ss_bit = self.ss_start = 0 - self.data = self.count = self.active = self.old_ir = None + self.ss_bit = self.ss_start = self.ss_other_edge = self.ss_remote = 0 + self.data = [] + self.addr = self.cmd = None def start(self): - # self.out_python = self.register(srd.OUTPUT_PYTHON) self.out_ann = self.register(srd.OUTPUT_ANN) - self.active = 0 if self.options['polarity'] == 'active-low' else 1 - self.old_ir = 1 if self.active == 0 else 0 def metadata(self, key, value): if key == srd.SRD_CONF_SAMPLERATE: self.samplerate = value - self.margin = int(self.samplerate * 0.0001) - 1 # 0.1ms + + def calc_rate(self): + self.tolerance = 0.05 # +/-5% self.lc = int(self.samplerate * 0.0135) - 1 # 13.5ms self.rc = int(self.samplerate * 0.01125) - 1 # 11.25ms self.dazero = int(self.samplerate * 0.001125) - 1 # 1.125ms self.daone = int(self.samplerate * 0.00225) - 1 # 2.25ms + self.stop = int(self.samplerate * 0.000652) - 1 # 0.652ms + self.idle_to = int(self.samplerate * 0.020) - 1 # 20ms, arbitrary choice - def handle_bits(self, tick): - ret = 0xff - if tick in range(self.dazero - self.margin, self.dazero + self.margin): + def compare_with_tolerance(self, measured, base): + return (measured >= base * (1 - self.tolerance) + and measured <= base * (1 + self.tolerance)) + + def handle_bit(self, tick): + ret = None + if self.compare_with_tolerance(tick, self.dazero): ret = 0 - elif tick in range(self.daone - self.margin, self.daone + self.margin): + elif self.compare_with_tolerance(tick, self.daone): ret = 1 - - if ret < 2: - self.putb([0, ['%d' % ret]]) - self.data = self.data * 2 + ret - self.count = self.count + 1 - + if ret in (0, 1): + self.putb([Ann.BIT, ['{:d}'.format(ret)]]) + self.data.append(ret) self.ss_bit = self.samplenum - return ret - - def data_judge(self): - ret, name = (self.data >> 8) & (self.data & 0xff), self.state.title() - if ret == 0: - self.putx([2, ['%s: 0x%02x' % (name, self.data >> 8)]]) - else: - self.putx([3, ['%s error: 0x%04x' % (name, self.data)]]) - self.data = self.count = 0 + + def data_ok(self, check, want_len): + name = self.state.title() + normal, inverted = bitpack(self.data[:8]), bitpack(self.data[8:]) + valid = (normal ^ inverted) == 0xff + show = inverted if self.state.endswith('#') else normal + is_ext_addr = self.is_extended and self.state == 'ADDRESS' + if is_ext_addr: + normal = bitpack(self.data) + show = normal + valid = True + if len(self.data) == want_len: + if self.state == 'ADDRESS': + self.addr = normal + if self.state == 'COMMAND': + self.cmd = normal + self.putd(show, want_len) + self.ss_start = self.samplenum + if is_ext_addr: + self.data = [] + self.ss_bit = self.ss_start = self.samplenum + return True + self.putd(show, want_len) + if check and not valid: + warn_show = bitpack(self.data) + self.putx([Ann.WARN, ['{} error: 0x{:04X}'.format(name, warn_show)]]) + self.data = [] self.ss_bit = self.ss_start = self.samplenum - return ret + return valid + + def decode(self): + if not self.samplerate: + raise SamplerateError('Cannot decode without samplerate.') + self.calc_rate() - def decode(self, ss, es, data): - if self.samplerate is None: - raise Exception("Cannot decode without samplerate.") - for (self.samplenum, pins) in data: - self.ir = pins[0] + cd_count = None + if self.options['cd_freq']: + cd_count = int(self.samplerate / self.options['cd_freq']) + 1 + prev_ir = None - # Wait for an "active" edge (default: falling edge). - if self.old_ir == self.ir or self.ir != self.active: - self.old_ir = self.ir - continue + active = 0 if self.options['polarity'] == 'active-low' else 1 + self.is_extended = self.options['extended'] == 'yes' + want_addr_len = 16 if self.is_extended else 8 - b = self.samplenum - self.ss_bit + while True: + # 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([{Pin.IR: 'e'}, {'skip': cd_count}]) + if self.matched[0]: + cur_ir = active + if cur_ir == prev_ir: + continue + prev_ir = cur_ir + self.ir = cur_ir + else: + (self.ir,) = self.wait({Pin.IR: 'e'}) + + if self.ir != active: + # Save the location of the non-active edge (recessive), + # then wait for the next edge. Immediately process the + # end of the STOP bit which completes an IR frame. + self.ss_other_edge = self.samplenum + if self.state != 'STOP': + continue + + # Reset internal state for long periods of idle level. + width = self.samplenum - self.ss_bit + if width >= self.idle_to and self.state != 'STOP': + self.reset() # State machine. if self.state == 'IDLE': - if b in range(self.lc - self.margin, self.lc + self.margin): - self.putx([1, ['Leader code', 'Leader', 'LC', 'L']]) - self.data = self.count = 0 + if self.compare_with_tolerance(width, self.lc): + self.putpause('Long') + self.putx([Ann.LEADER_CODE, ['Leader code', 'Leader', 'LC', 'L']]) + self.ss_remote = self.ss_start + self.data = [] self.state = 'ADDRESS' - elif b in range(self.rc - self.margin, self.rc + self.margin): - self.putx([1, ['Repeat code', 'Repeat', 'RC', 'R']]) - self.data = self.count = 0 + elif self.compare_with_tolerance(width, self.rc): + self.putpause('Short') + self.putstop(self.samplenum) + self.samplenum += self.stop + self.putx([Ann.REPEAT_CODE, ['Repeat code', 'Repeat', 'RC', 'R']]) + self.data = [] self.ss_bit = self.ss_start = self.samplenum elif self.state == 'ADDRESS': - self.handle_bits(b) - if self.count > 15: - self.state = 'COMMAND' if self.data_judge() == 0 else 'IDLE' + self.handle_bit(width) + if len(self.data) == want_addr_len: + self.data_ok(False, want_addr_len) + self.state = 'COMMAND' if self.is_extended else 'ADDRESS#' + elif self.state == 'ADDRESS#': + self.handle_bit(width) + if len(self.data) == 16: + self.data_ok(True, 8) + self.state = 'COMMAND' elif self.state == 'COMMAND': - self.handle_bits(b) - if self.count > 15: - self.data_judge() - self.state = 'IDLE' - - self.old_ir = self.ir - + self.handle_bit(width) + if len(self.data) == 8: + self.data_ok(False, 8) + self.state = 'COMMAND#' + elif self.state == 'COMMAND#': + self.handle_bit(width) + if len(self.data) == 16: + self.data_ok(True, 8) + self.state = 'STOP' + elif self.state == 'STOP': + self.putstop(self.ss_bit) + self.putremote() + self.ss_bit = self.ss_start = self.samplenum + self.state = 'IDLE'