diff options
| -rw-r--r-- | decoders/ad5626/__init__.py | 25 | ||||
| -rw-r--r-- | decoders/ad5626/pd.py | 68 |
2 files changed, 93 insertions, 0 deletions
diff --git a/decoders/ad5626/__init__.py b/decoders/ad5626/__init__.py new file mode 100644 index 0000000..5f67799 --- /dev/null +++ b/decoders/ad5626/__init__.py @@ -0,0 +1,25 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2020 Analog Devices Inc. +## +## 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 3 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, see <http://www.gnu.org/licenses/>. +## + +''' +This decoder stacks on top of the 'spi' PD and decodes the +Analog Devices AD5626 protocol. +''' + +from .pd import Decoder diff --git a/decoders/ad5626/pd.py b/decoders/ad5626/pd.py new file mode 100644 index 0000000..1aab7e4 --- /dev/null +++ b/decoders/ad5626/pd.py @@ -0,0 +1,68 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2020 Analog Devices Inc. +## +## 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 3 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, see <http://www.gnu.org/licenses/>. +## + +import sigrokdecode as srd + +class Decoder(srd.Decoder): + api_version = 3 + id = 'ad5626' + name = 'AD5626' + longname = 'Analog Devices AD5626' + desc = 'Analog Devices AD5626 12-bit nanoDAC.' + license = 'gplv2+' + inputs = ['spi'] + outputs = [] + tags = ['Display'] + annotations = ( + ('data', 'Data'), + ) + annotation_rows = ( + ('data', 'Data', (0,)), + ) + + def __init__(self,): + self.reset() + + def reset(self): + self.data = 0 + self.ss = 0 + + def start(self): + self.out_ann = self.register(srd.OUTPUT_ANN) + + def put_data(self, pos, data): + self.put(pos[0], pos[1], self.out_ann, [0, [str(data) + 'V']]) + + def decode(self, ss, es, data): + ptype = data[0] + + if ptype == 'CS-CHANGE': + cs_old, cs_new = data[1:] + if cs_old is not None and cs_old == 0 and cs_new == 1: + self.data >>= 1 + self.data /= 1000 + self.put_data([self.ss, es], self.data) + self.data = 0 + elif cs_old is not None and cs_old == 1 and cs_new == 0: + self.ss = ss + elif ptype == 'BITS': + mosi = data[1] + for bit in reversed(mosi): + self.data = self.data | bit[0] + self.data <<= 1 |