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1 | ## |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2013 Bert Vermeulen <bert@biot.com> | |
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 | |
4539e9ca | 17 | ## along with this program; if not, see <http://www.gnu.org/licenses/>. |
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18 | ## |
19 | ||
20 | ''' | |
4c3b1846 | 21 | This PD decodes the XFP I²C management interface structures/protocol. |
845f0d40 | 22 | |
00197484 UH |
23 | XFP modules include an I²C interface, used to monitor and control various |
24 | aspects of the module. The specification defines an I²C slave at address | |
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25 | 0x50 (0xa0) which returns 128 bytes of a standard structure ("lower memory"), |
26 | and, after setting a table number in lower memory, a set of 256 "higher | |
27 | memory" tables, which can be mapped to different subdevices on the XFP. | |
28 | ||
29 | Only one table is defined in the specification: table 0x01, the default on | |
30 | module startup. Other table are either reserved for future expansion, or | |
31 | available for vendor-specific extensions. This decoder supports both lower | |
32 | memory and table 0x01. | |
33 | ||
2787cf2a UH |
34 | Details: |
35 | ftp://ftp.seagate.com/sff/INF-8077.PDF (XFP specification) | |
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36 | ''' |
37 | ||
95d11271 | 38 | from .pd import Decoder |