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1 | ## |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2016 Robert Bosch Car Multimedia GmbH | |
5 | ## Authors: Oleksij Rempel | |
6 | ## <fixed-term.Oleksij.Rempel@de.bosch.com> | |
7 | ## <linux@rempel-privat.de> | |
8 | ## | |
9 | ## This program is free software; you can redistribute it and/or modify | |
10 | ## it under the terms of the GNU General Public License as published by | |
11 | ## the Free Software Foundation; either version 2 of the License, or | |
12 | ## (at your option) any later version. | |
13 | ## | |
d66d47ed UH |
14 | ## This program is distributed in the hope that it will be useful, |
15 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ## GNU General Public License for more details. | |
18 | ## | |
19 | ## You should have received a copy of the GNU General Public License | |
4539e9ca | 20 | ## along with this program; if not, see <http://www.gnu.org/licenses/>. |
d66d47ed | 21 | ## |
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22 | |
23 | import sigrokdecode as srd | |
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24 | |
25 | class Decoder(srd.Decoder): | |
b197383c | 26 | api_version = 3 |
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27 | id = 'ssi32' |
28 | name = 'SSI32' | |
e1fefac5 UH |
29 | longname = 'Synchronous Serial Interface (32bit)' |
30 | desc = 'Synchronous Serial Interface (32bit) protocol.' | |
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31 | license = 'gplv2+' |
32 | inputs = ['spi'] | |
6cbba91f | 33 | outputs = [] |
d6d8a8a4 | 34 | tags = ['Embedded/industrial'] |
268d62bf OR |
35 | options = ( |
36 | {'id': 'msgsize', 'desc': 'Message size', 'default': 64}, | |
37 | ) | |
38 | annotations = ( | |
39 | ('ctrl-tx', 'CTRL TX'), | |
40 | ('ack-tx', 'ACK TX'), | |
41 | ('ctrl-rx', 'CTRL RX'), | |
d66d47ed | 42 | ('ack-rx', 'ACK RX'), |
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43 | ) |
44 | annotation_rows = ( | |
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45 | ('tx', 'TX', (0, 1)), |
46 | ('rx', 'RX', (2, 3)), | |
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47 | ) |
48 | ||
49 | def __init__(self): | |
10aeb8ea GS |
50 | self.reset() |
51 | ||
52 | def reset(self): | |
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53 | self.ss_cmd, self.es_cmd = 0, 0 |
54 | self.mosi_bytes = [] | |
55 | self.miso_bytes = [] | |
56 | self.es_array = [] | |
57 | self.rx_size = 0 | |
58 | self.tx_size = 0 | |
59 | ||
60 | def start(self): | |
61 | self.out_ann = self.register(srd.OUTPUT_ANN) | |
62 | ||
63 | def putx(self, data): | |
64 | self.put(self.ss_cmd, self.es_cmd, self.out_ann, data) | |
65 | ||
ecb0b96d | 66 | def reset_data(self): |
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67 | self.mosi_bytes = [] |
68 | self.miso_bytes = [] | |
69 | self.es_array = [] | |
70 | ||
71 | def handle_ack(self): | |
d66d47ed | 72 | # Only first byte should have ACK data, other 3 bytes are reserved. |
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73 | self.es_cmd = self.es_array[0] |
74 | self.putx([1, ['> ACK:0x%02x' % (self.mosi_bytes[0])]]) | |
75 | self.putx([3, ['< ACK:0x%02x' % (self.miso_bytes[0])]]) | |
76 | ||
77 | def handle_ctrl(self): | |
78 | mosi = miso = '' | |
79 | self.tx_size = self.mosi_bytes[2] | |
80 | self.rx_size = self.miso_bytes[2] | |
81 | ||
82 | if self.tx_size > 0: | |
83 | mosi = ', DATA:0x' + ''.join(format(x, '02x') for x in self.mosi_bytes[4:self.tx_size + 4]) | |
84 | if self.rx_size > 0: | |
85 | miso = ', DATA:0x' + ''.join(format(x, '02x') for x in self.miso_bytes[4:self.rx_size + 4]) | |
86 | ||
87 | self.es_cmd = self.es_array[self.tx_size + 3] | |
d66d47ed | 88 | self.putx([0, ['> CTRL:0x%02x, LUN:0x%02x, SIZE:0x%02x, CRC:0x%02x%s' |
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89 | % (self.mosi_bytes[0], self.mosi_bytes[1], |
90 | self.mosi_bytes[2], self.mosi_bytes[3], mosi)]]) | |
91 | ||
92 | self.es_cmd = self.es_array[self.rx_size + 3] | |
d66d47ed | 93 | self.putx([2, ['< CTRL:0x%02x, LUN:0x%02x, SIZE:0x%02x, CRC:0x%02x%s' |
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94 | % (self.miso_bytes[0], self.miso_bytes[1], |
95 | self.miso_bytes[2], self.miso_bytes[3], miso)]]) | |
96 | ||
97 | def decode(self, ss, es, data): | |
98 | ptype = data[0] | |
99 | if ptype == 'CS-CHANGE': | |
ecb0b96d | 100 | self.reset_data() |
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101 | return |
102 | ||
103 | # Don't care about anything else. | |
104 | if ptype != 'DATA': | |
105 | return | |
106 | mosi, miso = data[1:] | |
107 | ||
108 | self.ss, self.es = ss, es | |
109 | ||
110 | if len(self.mosi_bytes) == 0: | |
111 | self.ss_cmd = ss | |
112 | self.mosi_bytes.append(mosi) | |
113 | self.miso_bytes.append(miso) | |
114 | self.es_array.append(es) | |
115 | ||
116 | if self.mosi_bytes[0] & 0x80: | |
117 | if len(self.mosi_bytes) < 4: | |
118 | return | |
119 | ||
120 | self.handle_ack() | |
ecb0b96d | 121 | self.reset_data() |
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122 | else: |
123 | if len(self.mosi_bytes) < self.options['msgsize']: | |
124 | return | |
125 | ||
126 | self.handle_ctrl() | |
ecb0b96d | 127 | self.reset_data() |