|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @defgroup SERIAL_USB Serial over USB Driver
* @brief Serial over USB Driver.
* @details This module implements an USB Communication Device Class
* (CDC) as a normal serial communication port accessible from
* the device application.
* @pre In order to use the USB over Serial driver the
* @p HAL_USE_SERIAL_USB option must be enabled in @p halconf.h.
*
* @section usb_serial_1 Driver State Machine
* The driver implements a state machine internally, not all the driver
* functionalities can be used in any moment, any transition not explicitly
* shown in the following diagram has to be considered an error and shall
* be captured by an assertion (if enabled).
* @dot
digraph example {
rankdir="LR";
node [shape=circle, fontname=Helvetica, fontsize=8, fixedsize="true",
width="0.9", height="0.9"];
edge [fontname=Helvetica, fontsize=8];
uninit [label="SDU_UNINIT", style="bold"];
stop [label="SDU_STOP\nLow Power"];
ready [label="SDU_READY\nClock Enabled"];
uninit -> stop [label=" sduInit()"];
stop -> stop [label="\nsduStop()"];
stop -> ready [label="\nsduStart()"];
ready -> stop [label="\nsduStop()"];
ready -> ready [label="\nsduStart()"];
ready -> ready [label="\nAny I/O operation"];
}
* @enddot
*
* @ingroup IO
*/
|
