2 ## This file is part of the libsigrokdecode project.
4 ## Copyright (C) 2017 Kevin Redon <kingkevin@cuvoodoo.info>
6 ## This program is free software; you can redistribute it and/or modify
7 ## it under the terms of the GNU General Public License as published by
8 ## the Free Software Foundation; either version 2 of the License, or
9 ## (at your option) any later version.
11 ## This program is distributed in the hope that it will be useful,
12 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ## GNU General Public License for more details.
16 ## You should have received a copy of the GNU General Public License
17 ## along with this program; if not, see <http://www.gnu.org/licenses/>.
20 import sigrokdecode as srd
22 class Decoder(srd.Decoder):
26 longname = '93xx Microwire EEPROM'
27 desc = '93xx series Microwire EEPROM protocol.'
29 inputs = ['microwire']
31 tags = ['IC', 'Memory']
33 {'id': 'addresssize', 'desc': 'Address size', 'default': 8},
34 {'id': 'wordsize', 'desc': 'Word size', 'default': 16},
37 ('si-data', 'SI data'),
38 ('so-data', 'SO data'),
39 ('warning', 'Warning'),
42 ('data', 'Data', (0, 1)),
43 ('warnings', 'Warnings', (2,)),
53 self.out_ann = self.register(srd.OUTPUT_ANN)
54 self.addresssize = self.options['addresssize']
55 self.wordsize = self.options['wordsize']
57 def put_address(self, data):
58 # Get address (MSb first).
60 for b in range(len(data)):
61 a += (data[b].si << (len(data) - b - 1))
62 self.put(data[0].ss, data[-1].es, self.out_ann,
63 [0, ['Address: 0x%x' % a, 'Addr: 0x%x' % a, '0x%x' % a]])
65 def put_word(self, si, data):
66 # Decode word (MSb first).
68 for b in range(len(data)):
69 d = data[b].si if si else data[b].so
70 word += (d << (len(data) - b - 1))
72 self.put(data[0].ss, data[-1].es,
73 self.out_ann, [idx, ['Data: 0x%x' % word, '0x%x' % word]])
75 def decode(self, ss, es, data):
76 if len(data) < (2 + self.addresssize):
77 self.put(ss, es, self.out_ann, [2, ['Not enough packet bits']])
80 opcode = (data[0].si << 1) + (data[1].si << 0)
84 self.put(data[0].ss, data[1].es,
85 self.out_ann, [0, ['Read word', 'READ']])
86 self.put_address(data[2:2 + self.addresssize])
89 word_start = 2 + self.addresssize
90 while len(data) - word_start > 0:
91 # Check if there are enough bits for a word.
92 if len(data) - word_start < self.wordsize:
93 self.put(data[word_start].ss, data[len(data) - 1].es,
94 self.out_ann, [2, ['Not enough word bits']])
96 self.put_word(False, data[word_start:word_start + self.wordsize])
98 word_start += self.wordsize
101 self.put(data[0].ss, data[1].es,
102 self.out_ann, [0, ['Write word', 'WRITE']])
103 self.put_address(data[2:2 + self.addresssize])
105 if len(data) < 2 + self.addresssize + self.wordsize:
106 self.put(data[2 + self.addresssize].ss,
107 data[len(data) - 1].ss,
108 self.out_ann, [2, ['Not enough word bits']])
110 self.put_word(True, data[2 + self.addresssize:2 + self.addresssize + self.wordsize])
113 self.put(data[0].ss, data[1].es,
114 self.out_ann, [0, ['Erase word', 'ERASE']])
115 self.put_address(data[2:2 + self.addresssize])
117 if data[2].si == 1 and data[3].si == 1:
119 self.put(data[0].ss, data[2 + self.addresssize - 1].es,
120 self.out_ann, [0, ['Write enable', 'WEN']])
121 elif data[2].si == 0 and data[3].si == 0:
123 self.put(data[0].ss, data[2 + self.addresssize - 1].es,
124 self.out_ann, [0, ['Write disable', 'WDS']])
125 elif data[2].si == 1 and data[3].si == 0:
127 self.put(data[0].ss, data[2 + self.addresssize - 1].es,
128 self.out_ann, [0, ['Erase all memory',
129 'Erase all', 'ERAL']])
130 elif data[2].si == 0 and data[3].si == 1:
132 self.put(data[0].ss, data[2 + self.addresssize - 1].es,
133 self.out_ann, [0, ['Write all memory',
134 'Write all', 'WRAL']])
136 if len(data) < 2 + self.addresssize + self.wordsize:
137 self.put(data[2 + self.addresssize].ss,
138 data[len(data) - 1].ss,
139 self.out_ann, [2, ['Not enough word bits']])
141 self.put_word(True, data[2 + self.addresssize:2 + self.addresssize + self.wordsize])