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64 lines
2.5 KiB
Plaintext
64 lines
2.5 KiB
Plaintext
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012,2013 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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---
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A special exception to the GPL can be applied should you wish to distribute
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a combined work that includes ChibiOS/RT, without being obliged to provide
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the source code for any proprietary components. See the file exception.txt
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for full details of how and when the exception can be applied.
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*/
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/**
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* @defgroup SERIAL_USB Serial over USB Driver
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* @brief Serial over USB Driver.
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* @details This module implements an USB Communication Device Class
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* (CDC) as a normal serial communication port accessible from
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* the device application.
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* @pre In order to use the USB over Serial driver the
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* @p HAL_USE_SERIAL_USB option must be enabled in @p halconf.h.
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*
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* @section usb_serial_1 Driver State Machine
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* The driver implements a state machine internally, not all the driver
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* functionalities can be used in any moment, any transition not explicitly
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* shown in the following diagram has to be considered an error and shall
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* be captured by an assertion (if enabled).
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* @dot
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digraph example {
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rankdir="LR";
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node [shape=circle, fontname=Helvetica, fontsize=8, fixedsize="true",
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width="0.9", height="0.9"];
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edge [fontname=Helvetica, fontsize=8];
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uninit [label="SDU_UNINIT", style="bold"];
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stop [label="SDU_STOP\nLow Power"];
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ready [label="SDU_READY\nClock Enabled"];
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uninit -> stop [label=" sduInit()"];
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stop -> stop [label="\nsduStop()"];
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stop -> ready [label="\nsduStart()"];
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ready -> stop [label="\nsduStop()"];
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ready -> ready [label="\nsduStart()"];
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ready -> ready [label="\nAny I/O operation"];
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}
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* @enddot
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*
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* @ingroup IO
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*/
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