--- /dev/null
+##
+## This file is part of the libsigrokdecode project.
+##
+## Copyright (C) 2014 Gump Yang <gump.yang@gmail.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, write to the Free Software
+## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+##
+
+import sigrokdecode as srd
+
+class Decoder(srd.Decoder):
+ api_version = 1
+ id = 'ir_nec6122'
+ name = 'IR NEC 6122'
+ longname = '1-Wire Infrared remote controller NEC 6122'
+ desc = 'Unidirectional, asynchronous serial bus.'
+ license = 'gplv2+'
+ inputs = ['logic']
+ outputs = ['ir_nec6122']
+ probes = [
+ {'id': 'ir', 'name': 'IR', 'desc': 'Data line'},
+ ]
+ optional_probes = []
+ options = {
+ 'level': ['Tirgger Level L/H', 0],
+ 'cnt_peroid': ['Peroid time (us)', 13500],
+ 'cnt_repeat': ['Repeat time (us)', 11250],
+ 'cnt_repeat_end': ['Repeat end time (us)', 562],
+ 'cnt_accuracy': ['Accuracy range (us)', 100],
+ 'cnt_dazero': ['Data 0 time (us)', 1125],
+ 'cnt_daone': ['Data 1 time (us)', 2250],
+ 'polarity': ['Polarity', 'active-low'],
+ }
+ annotations = [
+ ['bit', 'Bit'],
+ ['preoid', 'Preoid'],
+ ['info', 'Info'],
+ ['error', 'Error'],
+ ]
+ annotation_rows = (
+ ('fields', 'Fields', (1, 2, 3, 4, 5, 6)),
+ ('bits', 'Bits', (0,)),
+ )
+
+ def putx(self, data):
+ self.put(self.ss_edge, self.samplenum, self.out_ann, data)
+
+ def putx(self, data):
+ self.put(self.ss_start, self.samplenum, self.out_ann, data)
+
+ def putb(self, data):
+ self.put(self.ss_bit, self.samplenum, self.out_ann, data)
+
+ def __init__(self, **kwargs):
+ self.olddata = None
+ self.ss_edge = 0
+ self.ss_bit = 0
+ self.first_transition = True
+ self.bitwidth = None
+ self.state = 'IDLE'
+ self.data = 0;
+ self.count = 0;
+ self.ss_start = 0
+ self.act_polar = 0
+
+ def start(self):
+ # self.out_python = self.register(srd.OUTPUT_PYTHON)
+ self.out_ann = self.register(srd.OUTPUT_ANN)
+ self.act_polar = 1 if self.options['polarity'] == 'active-low' else 0
+ self.old_ir = self.act_polar
+
+ def metadata(self, key, value):
+ if key == srd.SRD_CONF_SAMPLERATE:
+ self.samplerate = value
+ samplerate = float(self.samplerate)
+
+ x = float(self.options['cnt_accuracy']) / 1000000.0
+ self.margin = int(samplerate * x) - 1
+ x = float(self.options['cnt_peroid']) / 1000000.0
+ self.preoid = int(samplerate * x) - 1
+ x = float(self.options['cnt_repeat']) / 1000000.0
+ self.repeat = int(samplerate * x) - 1
+ x = float(self.options['cnt_repeat_end']) / 1000000.0
+ self.repeat_end = int(samplerate * x) - 1
+ x = float(self.options['cnt_dazero']) / 1000000.0
+ self.dazero = int(samplerate * x) - 1
+ x = float(self.options['cnt_daone']) / 1000000.0
+ self.daone = int(samplerate * x) - 1
+ x = float(10000) / 1000000.0
+ self.end = int(samplerate * x) - 1
+
+ def handle_bits(self, tick):
+ ret = 0xff
+ if tick in range(self.dazero - self.margin,
+ self.dazero + self.margin):
+ ret = 0
+ elif tick in range(self.daone - self.margin,
+ self.daone + self.margin):
+ ret = 1
+
+ if ret < 2:
+ self.putb([0, ['%d' % ret]])
+ self.data = self.data * 2 + ret
+ self.count = self.count + 1
+
+ self.ss_bit = self.samplenum
+ return ret;
+
+ def data_judge(self, name):
+ buf = int((self.data & 0xff00) / 0x100)
+ nbuf = int(self.data & 0xff)
+ ret = buf & nbuf
+ if ret == 0:
+ self.putx([2, ['%s: 0x%02x' % (name, buf)]])
+ else:
+ self.putx([3, ['%s Error: 0x%04x' % (name, self.data)]])
+
+ self.data = self.count = 0
+ self.ss_bit = self.ss_start = self.samplenum
+ return ret
+
+ 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]
+
+ # Wait for any edge (rising or falling).
+ if self.old_ir == self.ir:
+ continue
+
+ if self.old_ir == self.act_polar:
+ b = self.samplenum - self.ss_bit
+ # State machine.
+ if self.state == 'IDLE':
+ if b in range(self.preoid - self.margin,
+ self.preoid + self.margin):
+ self.putx([1, ['Preoid', 'Pre', 'P']])
+ self.data = self.count = 0
+ self.state = 'ADDRESS'
+ elif b in range(self.repeat - self.margin,
+ self.repeat + self.margin):
+ self.putx([1, ['Repeat', 'Rep', 'R']])
+ self.data = self.count = 0
+ self.ss_bit = self.ss_start = self.samplenum
+ elif self.state == 'ADDRESS':
+ self.handle_bits(b)
+ if self.count > 15:
+ if self.data_judge(self.state) == 0:
+ self.state = 'CODE'
+ else:
+ self.state = 'IDLE'
+ elif self.state == 'CODE':
+ self.handle_bits(b)
+ if self.count > 15:
+ self.data_judge(self.state)
+ self.state = 'IDLE'
+
+ self.old_ir = self.ir
+
projects / libsigrokdecode.git / commitdiff