##
## 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 data 2 of the License, or
-## (at your option) any later data.
+## 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
## 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 <http://www.gnu.org/licenses/>.
##
import sigrokdecode as srd
options = (
{'id': 'polarity', 'desc': 'Polarity', 'default': 'active-high',
'values': ('active-low', 'active-high')},
- {'id': 'datarate' , 'desc': 'Data rate', 'default': '64',
- 'values': ('64', '32', '16')},
+ {'id': 'datarate' , 'desc': 'Data rate', 'default': 64,
+ 'values': (64, 32, 16)},
# {'id': 'coding', 'desc': 'Bit coding', 'default': 'biphase',
# 'values': ('biphase', 'manchester', 'psk')},
- {'id': 'coilfreq', 'desc': 'Coil frequency', 'default': '125000'},
+ {'id': 'coilfreq', 'desc': 'Coil frequency', 'default': 125000},
)
annotations = (
- ('headerbit', 'Header bit'),
- ('databit', 'Version bit'),
- ('rowparity', 'Row Parity'),
- ('databit', 'Data bit'),
- ('colparity', 'Column Parity'),
+ ('bit', 'Bit'),
+ ('header', 'Header'),
+ ('version-customer', 'Version/customer'),
+ ('data', 'Data'),
+ ('rowparity-ok', 'Row parity OK'),
+ ('rowparity-err', 'Row parity error'),
+ ('colparity-ok', 'Column parity OK'),
+ ('colparity-err', 'Column parity error'),
('stopbit', 'Stop bit'),
- ('rowparity_check', 'Row Parity Check'),
+ ('tag', 'Tag'),
)
annotation_rows = (
('bits', 'Bits', (0,)),
- ('fields', 'Fields', (1, 2, 4, 7)),
- ('value', 'Value', (3, 5, 6, 8)),
+ ('fields', 'Fields', (1, 2, 3, 4, 5, 6, 7, 8)),
+ ('tags', 'Tags', (9,)),
)
- def __init__(self, **kwargs):
+ def __init__(self):
self.samplerate = None
self.oldpin = None
self.last_samplenum = None
self.oldpl = 0
self.oldsamplenum = 0
self.last_bit_pos = 0
- self.first_start = 0
+ self.ss_first = 0
self.first_one = 0
self.state = 'HEADER'
self.data = 0
self.data_bits = 0
- self.data_start = 0
+ self.ss_data = 0
self.data_parity = 0
self.payload_cnt = 0
self.data_col_parity = [0, 0, 0, 0, 0, 0]
self.col_parity = [0, 0, 0, 0, 0, 0]
+ self.tag = 0
+ self.all_row_parity_ok = True
+ self.col_parity_pos = []
def metadata(self, key, value):
if key == srd.SRD_CONF_SAMPLERATE:
self.samplerate = value
- self.bit_width = (self.samplerate / (int(self.options['coilfreq']))) * int(self.options['datarate'])
+ self.bit_width = (self.samplerate / self.options['coilfreq']) * self.options['datarate']
self.halfbit_limit = self.bit_width/2 + self.bit_width/4
self.polarity = 0 if self.options['polarity'] == 'active-low' else 1
def start(self):
self.out_ann = self.register(srd.OUTPUT_ANN)
- def add_bit(self, bit, bit_start, bit_stop):
+ def putbit(self, bit, ss, es):
+ self.put(ss, es, self.out_ann, [0, [str(bit)]])
if self.state == 'HEADER':
if bit == 1:
if self.first_one > 0:
self.first_one += 1
if self.first_one == 9:
- self.put(int(self.first_start), int(bit_stop), self.out_ann,
+ self.put(self.ss_first, es, self.out_ann,
[1, ['Header', 'Head', 'He', 'H']])
self.first_one = 0
self.state = 'PAYLOAD'
return
if self.first_one == 0:
self.first_one = 1
- self.first_start = bit_start
+ self.ss_first = ss
if bit == 0:
self.first_one = 0
if self.state == 'PAYLOAD':
self.payload_cnt += 1
if self.data_bits == 0:
- self.data_start = bit_start
+ self.ss_data = ss
self.data = 0
self.data_parity = 0
self.data_bits += 1
if self.data_bits == 5:
- self.put(int(self.data_start), int(bit_start), self.out_ann,
- [2, ['Data', 'Da', 'D']])
- self.put(int(bit_start), int(bit_stop), self.out_ann,
- [4, ['Parity', 'Par', 'Pa', 'P']])
- self.put(int(self.data_start), int(bit_start), self.out_ann,
- [3, [str("%X" % self.data)]])
- if self.data_parity == bit:
- p_string = ['OK', 'O']
- else:
- p_string = ['ERROR', 'ERR', 'ER', 'E']
- self.put(int(bit_start), int(bit_stop), self.out_ann,
- [6, p_string])
+ s = 'Version/customer' if self.payload_cnt <= 10 else 'Data'
+ c = 2 if self.payload_cnt <= 10 else 3
+ self.put(self.ss_data, ss, self.out_ann,
+ [c, [s + ': %X' % self.data, '%X' % self.data]])
+ s = 'OK' if self.data_parity == bit else 'ERROR'
+ c = 4 if s == 'OK' else 5
+ if s == 'ERROR':
+ self.all_row_parity_ok = False
+ self.put(ss, es, self.out_ann,
+ [c, ['Row parity: ' + s, 'RP: ' + s, 'RP', 'R']])
+ self.tag = (self.tag << 4) | self.data
self.data_bits = 0
if self.payload_cnt == 50:
self.state = 'TRAILER'
if self.state == 'TRAILER':
self.payload_cnt += 1
if self.data_bits == 0:
- self.data_start = bit_start
+ self.ss_data = ss
self.data = 0
self.data_parity = 0
self.data_bits += 1
self.col_parity[self.data_bits] = bit
+ self.col_parity_pos.append([ss, es])
if self.data_bits == 5:
- p_string = ['ERROR', 'ERR', 'ER', 'E']
- if self.data_col_parity[1] == self.col_parity[1]:
- if self.data_col_parity[2] == self.col_parity[2]:
- if self.data_col_parity[3] == self.col_parity[3]:
- if self.data_col_parity[4] == self.col_parity[4]:
- p_string = ['OK', 'O']
-
- self.put(int(self.data_start), int(bit_start), self.out_ann,
- [4, ['Column parity', 'Col par', 'CP', 'P']])
- self.put(int(bit_start), int(bit_stop), self.out_ann,
- [4, ['Stop bit', 'St bi', 'SB', 'S']])
- self.put(int(self.data_start), int(bit_start), self.out_ann,
- [6, p_string])
-
+ self.put(ss, es, self.out_ann, [8, ['Stop bit', 'SB', 'S']])
+
+ for i in range(1, 5):
+ s = 'OK' if self.data_col_parity[i] == \
+ self.col_parity[i] else 'ERROR'
+ c = 6 if s == 'OK' else 7
+ self.put(self.col_parity_pos[i - 1][0],
+ self.col_parity_pos[i - 1][1], self.out_ann,
+ [c, ['Column parity %d: %s' % (i, s),
+ 'CP%d: %s' % (i, s), 'CP%d' % i, 'C']])
+
+ # Emit an annotation for valid-looking tags.
+ all_col_parity_ok = (self.data_col_parity[1:5] == self.col_parity[1:5])
+ if all_col_parity_ok and self.all_row_parity_ok:
+ self.put(self.ss_first, es, self.out_ann,
+ [9, ['Tag: %010X' % self.tag, 'Tag', 'T']])
+
+ self.tag = 0
self.data_bits = 0
+
if self.payload_cnt == 5:
self.state = 'HEADER'
self.payload_cnt = 0
self.data_col_parity = [0, 0, 0, 0, 0, 0]
self.col_parity = [0, 0, 0, 0, 0, 0]
-
- def putbit(self, bit, bit_start, bit_stop):
- self.put(int(bit_start), int(bit_stop), self.out_ann,
- [0, [str(bit)]])
- self.add_bit(bit, bit_start, bit_stop)
+ self.col_parity_pos = []
+ self.all_row_parity_ok = True
def manchester_decode(self, samplenum, pl, pp, pin):
- bit_start = 0
- bit_stop = 0
bit = self.oldpin ^ self.polarity
if pl > self.halfbit_limit:
- samples = samplenum - self.oldsamplenum
- t = samples / self.samplerate
-
+ es = int(samplenum - pl/2)
if self.oldpl > self.halfbit_limit:
- bit_start = int(self.oldsamplenum - self.oldpl/2)
- bit_stop = int(samplenum - pl/2)
- self.putbit(bit, bit_start, bit_stop)
- if self.oldpl <= self.halfbit_limit:
- bit_start = int(self.oldsamplenum - self.oldpl)
- bit_stop = int(samplenum - pl/2)
- self.putbit(bit, bit_start, bit_stop)
+ ss = int(self.oldsamplenum - self.oldpl/2)
+ else:
+ ss = int(self.oldsamplenum - self.oldpl)
+ self.putbit(bit, ss, es)
self.last_bit_pos = int(samplenum - pl/2)
-
- if pl < self.halfbit_limit:
- samples = samplenum - self.oldsamplenum
- t = samples / self.samplerate
-
+ else:
+ es = int(samplenum)
if self.oldpl > self.halfbit_limit:
- bit_start = self.oldsamplenum - self.oldpl/2
- bit_stop = int(samplenum)
- self.putbit(bit, bit_start, bit_stop)
+ ss = int(self.oldsamplenum - self.oldpl/2)
+ self.putbit(bit, ss, es)
self.last_bit_pos = int(samplenum)
- if self.oldpl <= self.halfbit_limit:
+ else:
if self.last_bit_pos <= self.oldsamplenum - self.oldpl:
- bit_start = self.oldsamplenum - self.oldpl
- bit_stop = int(samplenum)
- self.putbit(bit, bit_start, bit_stop)
+ ss = int(self.oldsamplenum - self.oldpl)
+ self.putbit(bit, ss, es)
self.last_bit_pos = int(samplenum)
def decode(self, ss, es, data):
if self.oldpin != pin:
pl = samplenum - self.oldsamplenum
pp = pin
-
self.manchester_decode(samplenum, pl, pp, pin)
-
self.oldpl = pl
self.oldpp = pp
self.oldsamplenum = samplenum
projects / libsigrokdecode.git / blobdiff