diff options
Diffstat (limited to 'decoders')
| -rw-r--r-- | decoders/Makefile.am | 1 | ||||
| -rw-r--r-- | decoders/tlc5620/Makefile.am | 26 | ||||
| -rw-r--r-- | decoders/tlc5620/__init__.py | 31 | ||||
| -rw-r--r-- | decoders/tlc5620/pd.py | 118 |
4 files changed, 176 insertions, 0 deletions
diff --git a/decoders/Makefile.am b/decoders/Makefile.am index d5ebd7d..6291b37 100644 --- a/decoders/Makefile.am +++ b/decoders/Makefile.am @@ -39,6 +39,7 @@ SUBDIRS = \ rtc8564 \ sdcard_spi \ spi \ + tlc5620 \ transitioncounter \ uart \ uart_dump \ diff --git a/decoders/tlc5620/Makefile.am b/decoders/tlc5620/Makefile.am new file mode 100644 index 0000000..d246526 --- /dev/null +++ b/decoders/tlc5620/Makefile.am @@ -0,0 +1,26 @@ +## +## This file is part of the sigrok project. +## +## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de> +## +## 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 +## + +pkgdatadir = $(DECODERS_DIR)/tlc5620 + +dist_pkgdata_DATA = __init__.py pd.py + +CLEANFILES = *.pyc + diff --git a/decoders/tlc5620/__init__.py b/decoders/tlc5620/__init__.py new file mode 100644 index 0000000..da136b6 --- /dev/null +++ b/decoders/tlc5620/__init__.py @@ -0,0 +1,31 @@ +## +## This file is part of the sigrok project. +## +## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de> +## +## 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 +## + +''' +Texas Instruments TLC5620 protocol decoder. + +TODO: Description. + +Details: +TODO +''' + +from .pd import * + diff --git a/decoders/tlc5620/pd.py b/decoders/tlc5620/pd.py new file mode 100644 index 0000000..71bfb2c --- /dev/null +++ b/decoders/tlc5620/pd.py @@ -0,0 +1,118 @@ +## +## This file is part of the sigrok project. +## +## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de> +## +## 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 +## + +# Texas Instruments TLC5620 protocol decoder + +import sigrokdecode as srd + +dacs = { + 0: 'DACA', + 1: 'DACB', + 2: 'DACC', + 3: 'DACD', +} + +class Decoder(srd.Decoder): + api_version = 1 + id = 'tlc5620' + name = 'TI TLC5620' + longname = 'Texas Instruments TLC5620' + desc = 'Texas Instruments TLC5620 8-bit quad DAC.' + license = 'gplv2+' + inputs = ['logic'] + outputs = ['tlc5620'] + probes = [ + {'id': 'clk', 'name': 'CLK', 'desc': 'Serial interface clock'}, + {'id': 'data', 'name': 'DATA', 'desc': 'Serial interface data'}, + ] + optional_probes = [ + {'id': 'load', 'name': 'LOAD', 'desc': 'Serial interface load control'}, + {'id': 'ldac', 'name': 'LDAC', 'desc': 'Load DAC'}, + ] + options = {} + annotations = [ + ['Text', 'Human-readable text'], + ['Warnings', 'Human-readable warnings'], + ] + + def __init__(self, **kwargs): + self.state = 'IDLE' + self.oldpins = None + self.oldclk = None + self.bits = [] + self.ss_dac = self.es_dac = 0 + self.ss_gain = self.es_gain = 0 + self.ss_value = self.es_value = 0 + + def start(self, metadata): + # self.out_proto = self.add(srd.OUTPUT_PROTO, 'tlc5620') + self.out_ann = self.add(srd.OUTPUT_ANN, 'tlc5620') + + def report(self): + pass + + def handle_11bits(self): + s = "".join(str(i) for i in self.bits[:2]) + self.put(self.ss_dac, self.es_dac, self.out_ann, + [0, ['DAC select: %s' % dacs[int(s, 2)]]]) + + self.put(self.ss_gain, self.es_gain, self.out_ann, + [0, ['Gain: x%d' % (1 + self.bits[2])]]) + + s = "".join(str(i) for i in self.bits[3:]) + self.put(self.ss_value, self.es_value, self.out_ann, + [0, ['DAC value: %d' % int(s, 2)]]) + + self.bits = [] + + def decode(self, ss, es, data): + for (self.samplenum, pins) in data: + + # Ignore identical samples early on (for performance reasons). + if self.oldpins == pins: + continue + self.oldpins, (clk, data, load, ldac) = pins, pins + + # DATA is shifted in the DAC on the falling CLK edge (MSB-first). + # TODO: Handle various LOAD-/LDAC-controlled methods. + if not (self.oldclk == 1 and clk == 0): + self.oldclk = clk + continue + + # The DAC has received a new bit, store it. + self.bits.append(data) + + if self.state == 'IDLE': + # Wait until we have read 11 bits, then parse them. + l, s = len(self.bits), self.samplenum + if l == 1: + self.ss_dac = s + elif l == 2: + self.es_dac = self.ss_gain = s + elif l == 3: + self.es_gain = self.ss_value = s + elif l == 11: + self.es_value = s + self.handle_11bits() + else: + raise Exception('Invalid state: %s' % self.state) + + self.oldclk = clk + |