X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=decoders%2Fir_nec%2Fpd.py;h=2e547d5a793b5978e069fee99b6c5cd905da0acc;hb=34ed4b3fb179f4ff7972879534a7395c90fe8d84;hp=b01af9e77b7160c1fefc526a550e75b428c2c6a2;hpb=bee57ee84753471970f9b65b34e71c54a0558768;p=libsigrokdecode.git diff --git a/decoders/ir_nec/pd.py b/decoders/ir_nec/pd.py index b01af9e..2e547d5 100644 --- a/decoders/ir_nec/pd.py +++ b/decoders/ir_nec/pd.py @@ -14,28 +14,40 @@ ## 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 . ## import sigrokdecode as srd from .lists import * +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'}, ) options = ( {'id': 'polarity', 'desc': 'Polarity', 'default': 'active-low', 'values': ('active-low', 'active-high')}, + {'id': 'cd_freq', 'desc': 'Carrier Frequency', 'default': 0}, ) annotations = ( ('bit', 'Bit'), @@ -50,13 +62,13 @@ class Decoder(srd.Decoder): ('cmd-inv', 'Command#'), ('repeat-code', 'Repeat code'), ('remote', 'Remote'), - ('warnings', 'Warnings'), + ('warning', 'Warning'), ) annotation_rows = ( - ('bits', 'Bits', (0, 1, 2, 3, 4)), - ('fields', 'Fields', (5, 6, 7, 8, 9, 10)), - ('remote', 'Remote', (11,)), - ('warnings', 'Warnings', (12,)), + ('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): @@ -67,23 +79,31 @@ class Decoder(srd.Decoder): def putd(self, data): name = self.state.title() - d = {'ADDRESS': 6, 'ADDRESS#': 7, 'COMMAND': 8, 'COMMAND#': 9} + 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#']} - self.putx([d[self.state], ['%s: 0x%02X' % (name, data), - '%s: 0x%02X' % (s[self.state][0], data), - '%s: 0x%02X' % (s[self.state][1], data), s[self.state][1]]]) + self.putx([d[self.state], [ + '{}: 0x{:02X}'.format(name, data), + '{}: 0x{:02X}'.format(s[self.state][0], data), + '{}: 0x{:02X}'.format(s[self.state][1], data), + s[self.state][1], + ]]) def putstop(self, ss): self.put(ss, ss + self.stop, self.out_ann, - [4, ['Stop bit', 'Stop', 'St', 'S']]) + [Ann.STOP_BIT, ['Stop bit', 'Stop', 'St', 'S']]) def putpause(self, p): self.put(self.ss_start, self.ss_other_edge, self.out_ann, - [1, ['AGC pulse', 'AGC', 'A']]) - idx = 2 if p == 'Long' else 3 - self.put(self.ss_other_edge, self.samplenum, self.out_ann, - [idx, [p + ' pause', '%s-pause' % p[0], '%sP' % p[0], 'P']]) + [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') @@ -92,40 +112,46 @@ class Decoder(srd.Decoder): btn = ['Unknown', 'Unk'] else: btn = buttons.get(self.cmd, ['Unknown', 'Unk']) - self.put(self.ss_remote, self.ss_bit + self.stop, self.out_ann, - [11, ['%s: %s' % (dev, btn[0]), '%s: %s' % (dev, btn[1]), - '%s' % btn[1]]]) + 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 __init__(self, **kwargs): + def reset(self): self.state = 'IDLE' self.ss_bit = self.ss_start = self.ss_other_edge = self.ss_remote = 0 - self.data = self.count = self.active = self.old_ir = None + self.data = self.count = self.active = None 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 + 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 + 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 tick in range(self.dazero - self.margin, self.dazero + self.margin): + 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 in (0, 1): - self.putb([0, ['%d' % ret]]) + self.putb([Ann.BIT, ['{:d}'.format(ret)]]) self.data |= (ret << self.count) # LSB-first self.count = self.count + 1 self.ss_bit = self.samplenum @@ -143,40 +169,67 @@ class Decoder(srd.Decoder): if ret == 0: self.putd(self.data >> 8) else: - self.putx([12, ['%s error: 0x%04X' % (name, self.data)]]) + self.putx([Ann.WARN, ['{} error: 0x{:04X}'.format(name, self.data)]]) self.data = self.count = 0 self.ss_bit = self.ss_start = self.samplenum return ret == 0 - 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] + def decode(self): + if not self.samplerate: + raise SamplerateError('Cannot decode without samplerate.') + + cd_count = None + if self.options['cd_freq']: + cd_count = int(self.samplerate / self.options['cd_freq']) + 1 + prev_ir = None + + self.active = 0 if self.options['polarity'] == 'active-low' else 1 + + 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 = self.active + if cur_ir == prev_ir: + continue + prev_ir = cur_ir + self.ir = cur_ir + else: + (self.ir,) = self.wait({Pin.IR: 'e'}) - # Wait for an "interesting" edge, but also record the other ones. - if self.old_ir == self.ir: - continue if self.ir != self.active: + # Save the non-active edge, then wait for the next edge. self.ss_other_edge = self.samplenum - self.old_ir = self.ir continue b = self.samplenum - self.ss_bit # State machine. if self.state == 'IDLE': - if b in range(self.lc - self.margin, self.lc + self.margin): + if self.compare_with_tolerance(b, self.lc): self.putpause('Long') - self.putx([5, ['Leader code', 'Leader', 'LC', 'L']]) + self.putx([Ann.LEADER_CODE, ['Leader code', 'Leader', 'LC', 'L']]) self.ss_remote = self.ss_start self.data = self.count = 0 self.state = 'ADDRESS' - elif b in range(self.rc - self.margin, self.rc + self.margin): + elif self.compare_with_tolerance(b, self.rc): self.putpause('Short') self.putstop(self.samplenum) self.samplenum += self.stop - self.putx([10, ['Repeat code', 'Repeat', 'RC', 'R']]) + self.putx([Ann.REPEAT_CODE, ['Repeat code', 'Repeat', 'RC', 'R']]) self.data = self.count = 0 self.ss_bit = self.ss_start = self.samplenum elif self.state == 'ADDRESS': @@ -200,8 +253,3 @@ class Decoder(srd.Decoder): self.putremote() self.ss_bit = self.ss_start = self.samplenum self.state = 'IDLE' - else: - raise Exception('Invalid state: %s' % self.state) - - self.old_ir = self.ir -