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1 | ## |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2019 Stephan Thiele <stephan.thiele@mailbox.org> | |
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 sigrokdecode as srd | |
21 | ||
22 | class Decoder(srd.Decoder): | |
23 | api_version = 3 | |
24 | id = 'nes_gamepad' | |
25 | name = 'NES gamepad' | |
26 | longname = 'Nintendo Entertainment System gamepad' | |
27 | desc = 'NES gamepad button states.' | |
28 | license = 'gplv2+' | |
29 | inputs = ['spi'] | |
30 | outputs = [] | |
31 | tags = ['Retro computing'] | |
32 | options = ( | |
33 | # Currently only the standard controller is supported. This might be | |
34 | # extended by special controllers like the Nintendo Zapper light gun. | |
35 | {'id': 'variant', 'desc': 'Gamepad variant', | |
36 | 'default': 'Standard gamepad', 'values': ('Standard gamepad',)}, | |
37 | ) | |
38 | annotations = ( | |
e144452b | 39 | ('button', 'Button state'), |
45c39fc4 ST |
40 | ('no-press', 'No button press'), |
41 | ('not-connected', 'Gamepad unconnected') | |
42 | ) | |
43 | annotation_rows = ( | |
44 | ('buttons', 'Button states', (0,)), | |
e144452b UH |
45 | ('no-presses', 'No button presses', (1,)), |
46 | ('not-connected-vals', 'Gamepad unconnected', (2,)), | |
45c39fc4 ST |
47 | ) |
48 | ||
49 | def __init__(self): | |
50 | self.reset() | |
51 | ||
52 | def reset(self): | |
53 | self.variant = None | |
45c39fc4 ST |
54 | |
55 | def start(self): | |
56 | self.out_ann = self.register(srd.OUTPUT_ANN) | |
57 | self.variant = self.options['variant'] | |
58 | ||
8f1dd70d GS |
59 | def putg(self, ss, es, cls, text): |
60 | self.put(ss, es, self.out_ann, [cls, [text]]) | |
45c39fc4 | 61 | |
8f1dd70d GS |
62 | def handle_data(self, ss, es, value): |
63 | if value == 0xff: | |
64 | self.putg(ss, es, 1, 'No button is pressed') | |
65 | return | |
45c39fc4 ST |
66 | |
67 | if value == 0x00: | |
8f1dd70d GS |
68 | self.putg(ss, es, 2, 'Gamepad is not connected') |
69 | return | |
45c39fc4 ST |
70 | |
71 | buttons = [ | |
72 | 'A', | |
73 | 'B', | |
74 | 'Select', | |
75 | 'Start', | |
76 | 'North', | |
77 | 'South', | |
78 | 'West', | |
8f1dd70d | 79 | 'East', |
45c39fc4 ST |
80 | ] |
81 | ||
8f1dd70d GS |
82 | bits = '{:08b}'.format(value) |
83 | text = [buttons[i] for i, b in enumerate(bits) if b == '0'] | |
84 | text = ' + '.join(text) | |
85 | self.putg(ss, es, 0, text) | |
45c39fc4 ST |
86 | |
87 | def decode(self, ss, es, data): | |
8f1dd70d GS |
88 | ptype, _, _ = data |
89 | if ptype == 'DATA': | |
90 | _, _, miso = data | |
91 | self.handle_data(ss, es, miso) | |
92 | return |