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1 | ## | |
2 | ## This file is part of the libsigrokdecode project. | |
3 | ## | |
4 | ## Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de> | |
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, write to the Free Software | |
18 | ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | ## | |
20 | ||
21 | ''' | |
22 | UART protocol decoder. | |
23 | ||
24 | Universal Asynchronous Receiver Transmitter (UART) is a simple serial | |
25 | communication protocol which allows two devices to talk to each other. | |
26 | ||
27 | This decoder should work on all "UART-like" async protocols with one | |
28 | start bit (0), 7-9 databits, an (optional) parity bit, and one or more | |
29 | stop bits (1), in this order. | |
30 | ||
31 | It can be run on one signal line (RX or TX) only, or on two lines (RX + TX). | |
32 | ||
33 | There are various standards for the physical layer specification of the | |
34 | signals, including RS232, (TTL) UART, RS485, and others. However, the logic | |
35 | level of the respective pins is only relevant when acquiring the data via | |
36 | a logic analyzer (you have to select the correct logic analyzer and/or | |
37 | the correct place where to probe). Once the data is in digital form and | |
38 | matches the "UART" description above, this protocol decoder can work with | |
39 | it though, no matter whether the source was on TTL UART levels, or RS232, | |
40 | or others. | |
41 | ''' | |
42 | ||
43 | from .pd import * | |
44 |