53 lines
1.9 KiB
Plaintext
53 lines
1.9 KiB
Plaintext
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/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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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 HAL_COMPLEX_DRIVERS
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*/
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