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bf014116 KR |
1 | ## |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2017 Kevin Redon <kingkevin@cuvoodoo.info> | |
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 | ''' | |
21 | Microwire is a 3-wire half-duplex synchronous serial communication protocol. | |
2787cf2a | 22 | |
bf014116 KR |
23 | Originally from National Semiconductor, it is often used in EEPROM chips with |
24 | device specific commands on top of the bit stream. | |
25 | ||
26 | Channels: | |
27 | ||
28 | - CS: chip select, active high | |
29 | - SK: clock line, for the synchronous communication (idle low) | |
30 | - SI: slave data input, output by the master and parsed by the selected slave | |
31 | on rising edge of clock line (idle low) | |
32 | - SO: slave data output, output by the selected slave and changed on rising | |
33 | edge of clock line, or goes from low to high when ready during status | |
34 | check (idle high impedance) | |
35 | ||
36 | The channel names might vary from chip to chip but the underlying function is | |
37 | the same. | |
38 | ''' | |
39 | ||
40 | from .pd import Decoder |