diff options
| -rw-r--r-- | decoders/sda2506/__init__.py | 24 | ||||
| -rw-r--r-- | decoders/sda2506/pd.py | 142 |
2 files changed, 166 insertions, 0 deletions
diff --git a/decoders/sda2506/__init__.py b/decoders/sda2506/__init__.py new file mode 100644 index 0000000..4e820ef --- /dev/null +++ b/decoders/sda2506/__init__.py @@ -0,0 +1,24 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2018 Max Weller +## +## 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, see <http://www.gnu.org/licenses/>. +## + +''' +Decoder for Siemens EEPROM SDA2506. +''' + +from .pd import Decoder diff --git a/decoders/sda2506/pd.py b/decoders/sda2506/pd.py new file mode 100644 index 0000000..b860e64 --- /dev/null +++ b/decoders/sda2506/pd.py @@ -0,0 +1,142 @@ +## +## This file is part of the libsigrokdecode project. +## +## Copyright (C) 2018 Max Weller +## +## 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, see <http://www.gnu.org/licenses/>. +## + +import re +import sigrokdecode as srd + +ann_cmdbit, ann_databit, ann_cmd, ann_data, ann_warning = range(5) + +class Decoder(srd.Decoder): + api_version = 3 + id = 'sda2506' + name = 'SDA2506' + longname = 'Siemens SDA 2506-5' + desc = 'Serial nonvolatile 1-Kbit EEPROM' + license = 'gplv2+' + inputs = ['logic'] + outputs = ['sda2506'] + channels = ( + {'id': 'clk', 'name': 'CLK', 'desc': 'Clock'}, + {'id': 'd', 'name': 'DATA', 'desc': 'Data'}, + {'id': 'ce', 'name': 'CE#', 'desc': 'Chip-enable'}, + ) + annotations = ( + ('cmdbit', 'Command bit'), + ('databit', 'Data bit'), + ('cmd', 'Command'), + ('data', 'Data byte'), + ('warnings', 'Human-readable warnings'), + ) + annotation_rows = ( + ('bits', 'Bits', (ann_cmdbit, ann_databit)), + ('commands', 'Commands', (ann_cmd,)), + ('data', 'Data', (ann_data,)), + ('warnings', 'Warnings', (ann_warning,)), + ) + + def __init__(self): + self.samplerate = None + self.reset() + + def reset(self): + self.cmdbits = [] + self.databits = [] + + def metadata(self, key, value): + if key == srd.SRD_CONF_SAMPLERATE: + self.samplerate = value + + def start(self): + self.out_ann = self.register(srd.OUTPUT_ANN) + + def putbit(self, ss, es, typ, value): + self.put(ss, es, self.out_ann, [typ, ['%s' % (value)]]) + + def putdata(self, ss, es): + value = 0 + for i in range(8): + value = (value << 1) | self.databits[i] + self.put(ss, es, self.out_ann, [ann_data, ['%02X' % (value)]]) + + def decode_bits(self, offset, width): + out = 0 + for i in range(width): + out = (out << 1) | self.cmdbits[offset + i][0] + return (out, self.cmdbits[offset + width - 1][1], self.cmdbits[offset][2]) + + def decode_field(self, name, offset, width): + val, ss, es = self.decode_bits(offset, width) + self.put(ss, es, self.out_ann, [ann_data, ['%s: %02X' % (name, val)]]) + return val + + def decode(self): + while True: + # Wait for CLK edge or CE edge. + clk, d, ce = self.wait([{0: 'e'}, {2: 'e'}]) + + if self.matched[0] and ce == 1 and clk == 1: + # Rising clk edge and command mode. + bitstart = self.samplenum + self.wait({0: 'f'}) + self.cmdbits = [(d, bitstart, self.samplenum)] + self.cmdbits + if len(self.cmdbits) > 24: + self.cmdbits = self.cmdbits[0:24] + self.putbit(bitstart, self.samplenum, ann_cmdbit, d) + elif self.matched[0] and ce == 0 and clk == 0: + # Falling clk edge and data mode. + bitstart = self.samplenum + clk, d, ce = self.wait([{'skip': int(2.5 * (1e6 / self.samplerate))}, {0: 'r'}, {2: 'e'}]) # Wait 25 us for data ready. + if self.matched == (True, False, False): + self.wait([{0: 'r'}, {2: 'e'}]) + if len(self.databits) == 0: + self.datastart = bitstart + self.databits = [d] + self.databits + self.putbit(bitstart, self.samplenum, ann_databit, d) + if len(self.databits) == 8: + self.putdata(self.datastart, self.samplenum) + self.databits = [] + elif self.matched[1] and ce == 0: + # Chip enable edge. + try: + self.decode_field('addr', 1, 7) + self.decode_field('CB', 0, 1) + if self.cmdbits[0][0] == 0: + # Beginning read command. + self.decode_field('read', 1, 7) + self.put(self.cmdbits[7][1], self.samplenum, + self.out_ann, [ann_cmd, ['read' ]]) + elif d == 0: + # Beginning write command. + self.decode_field('data', 8, 8) + addr, ss, es = self.decode_bits(1, 7) + data, ss, es = self.decode_bits(8, 8) + cmdstart = self.samplenum + self.wait({2: 'r'}) + self.put(cmdstart, self.samplenum, self.out_ann, + [ann_cmd, ['Write to %02X: %02X' % (addr, data)]]) + else: + # Beginning erase command. + val, ss, es = self.decode_bits(1, 7) + cmdstart = self.samplenum + self.wait({2: 'r'}) + self.put(cmdstart, self.samplenum, self.out_ann, + [ann_cmd, ['Erase: %02X' % (val)]]) + self.databits = [] + except Exception as ex: + self.reset() |