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1 | ## |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2019 Uli Huber | |
5 | ## | |
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. | |
10 | ## | |
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. | |
15 | ## | |
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/>. | |
18 | ## | |
19 | ||
20 | import re | |
21 | import sigrokdecode as srd | |
22 | ||
23 | ann_hdrbit, ann_databit, ann_paritybit, ann_bitlegende, ann_pos, ann_warning = range(6) | |
24 | ||
25 | class Decoder(srd.Decoder): | |
26 | api_version = 3 | |
27 | id = 'xy2-100' | |
28 | name = 'XY2-100' | |
29 | longname = 'XY2-100 Galvo Protocol' | |
30 | desc = 'Serial protocol for Galvo positioning' | |
31 | license = 'gplv2+' | |
32 | inputs = ['logic'] | |
33 | outputs = [] | |
34 | tags = ['Embedded/industrial'] | |
35 | channels = ( | |
36 | {'id': 'clk', 'name': 'D0', 'desc': 'Clock','default': 0}, | |
37 | {'id': 'sync', 'name': 'D1', 'desc': 'Sync','default': 1}, | |
38 | {'id': 'PosX', 'name': 'D2', 'desc': 'X/Y/Z','default': 2}, | |
39 | ) | |
40 | ||
41 | annotations = ( | |
42 | ('hdrbit', 'Header bit'), | |
43 | ('databit', 'Data bit'), | |
44 | ('paritybit', 'Parity bit'), | |
45 | ('bitlegende', 'Bit Legende'), | |
46 | ('position', 'Position Data'), | |
47 | ('warning', 'Human-readable warnings'), | |
48 | ) | |
49 | annotation_rows = ( | |
50 | ('bits', 'Bits', (ann_hdrbit, ann_databit, ann_paritybit)), | |
51 | ('legende', 'Legende', (ann_bitlegende,)), | |
52 | ('positions', 'Position', (ann_pos,)), | |
53 | ('warnings', 'Warnings', (ann_warning,)), | |
54 | ) | |
55 | ||
56 | def __init__(self): | |
57 | self.samplerate = None | |
58 | self.reset() | |
59 | ||
60 | def reset(self): | |
61 | self.hdrbits = [] | |
62 | self.databits = [] | |
63 | self.paritybits = [] | |
64 | ||
65 | def metadata(self, key, value): | |
66 | if key == srd.SRD_CONF_SAMPLERATE: | |
67 | self.samplerate = value | |
68 | ||
69 | def start(self): | |
70 | self.out_ann = self.register(srd.OUTPUT_ANN) | |
71 | ||
72 | def putbit(self, ss, es, typ, value): | |
73 | self.put(ss, es, self.out_ann, [typ, ['%s' % (value)]]) | |
74 | ||
75 | def decode(self): | |
76 | headerstart = 0 | |
77 | datastart = 0 | |
78 | dataend = 0 | |
79 | lastsample = 0 | |
80 | while True: | |
81 | # Wait for any edge CLK or SYNC | |
82 | clk, sync, PosX = self.wait({0: 'r'}) | |
83 | bitstart = self.samplenum | |
84 | bitend = bitstart+(bitstart-lastsample) | |
85 | ||
86 | # start data collection | |
87 | if sync == 1: | |
88 | # wait for falling edge clk | |
89 | clk, sync, PosX = self.wait({0: 'f'}) | |
90 | if len(self.hdrbits) < 3: | |
91 | if len(self.hdrbits) == 0: | |
92 | headerstart = bitstart | |
93 | self.hdrbits = [(PosX, bitstart, self.samplenum)] + self.hdrbits | |
94 | self.putbit(bitstart, bitend, ann_hdrbit, PosX) | |
95 | else: | |
96 | if len(self.databits) == 0: | |
97 | datastart = bitstart | |
98 | self.databits = [(PosX, bitstart, self.samplenum)] + self.databits | |
99 | #self.putbit(bitstart, self.samplenum+1, ann_databit, PosX) | |
100 | self.putbit(bitstart,bitend, ann_databit, PosX) | |
101 | dataend = bitend | |
102 | ||
103 | # get parity bit, calculate position | |
104 | elif sync == 0: | |
105 | clk, sync, PosX = self.wait({0: 'f'}) | |
106 | self.paritybits = [PosX] | |
107 | self.putbit(dataend, bitend, ann_paritybit, PosX) | |
108 | self.put(dataend,bitend, self.out_ann, [ann_bitlegende, ['Parity' ]]) | |
109 | self.put(headerstart,datastart, self.out_ann, [ann_bitlegende, ['Header' ]]) | |
110 | self.put(datastart, dataend, self.out_ann, [ann_bitlegende, ['Position' ]]) | |
111 | ||
112 | par=0 | |
113 | for x in self.hdrbits: | |
114 | par ^= x[0]&1 | |
115 | positionX = 0 | |
116 | stelle = 0 | |
117 | for x in self.databits: | |
118 | par ^= x[0]&1 | |
119 | if x[0] == 1: | |
120 | positionX = positionX + (1 << stelle) | |
121 | stelle += 1 | |
122 | ||
123 | self.put(datastart, dataend, self.out_ann, [ann_pos, ['%02d' % (positionX)]]) | |
124 | check = 'NOK' | |
125 | if PosX == par: | |
126 | check = 'OK' | |
127 | self.put(dataend, bitend, self.out_ann, [ann_pos, ['%02s' % (check)]]) | |
128 | ||
129 | #self.put(datastart, self.samplenum, self.out_ann, | |
130 | #[ann_warning, ['%s: %02X' % ('WARNUNG: ', 4711)]]) | |
131 | ||
132 | self.databits = [] | |
133 | self.hdrbits = [] | |
134 | ||
135 | lastsample = bitstart |