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58 lines
2.3 KiB
Plaintext
58 lines
2.3 KiB
Plaintext
4 years ago
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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 Serial Driver
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* @brief Generic Serial Driver.
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* @details This module implements a generic full duplex serial driver. The
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* driver implements a @p SerialDriver interface and uses I/O Queues
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* for communication between the upper and the lower driver. Event
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* flags are used to notify the application about incoming data,
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* outgoing data and other I/O events.<br>
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* The module also contains functions that make the implementation
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* of the interrupt service routines much easier.
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* @pre In order to use the SERIAL driver the @p HAL_USE_SERIAL option
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* must be enabled in @p halconf.h.
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*
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*
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* @section 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="SD_UNINIT", style="bold"];
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stop [label="SD_STOP\nLow Power"];
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ready [label="SD_READY\nClock Enabled"];
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uninit -> stop [label=" sdInit()"];
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stop -> stop [label="\nsdStop()"];
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stop -> ready [label="\nsdStart()"];
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ready -> stop [label="\nsdStop()"];
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ready -> ready [label="\nsdStart()"];
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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_NORMAL_DRIVERS
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*/
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