104 lines
3.9 KiB
Plaintext
104 lines
3.9 KiB
Plaintext
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/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011 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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/**
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* @defgroup SDC SDC Driver
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* @brief Generic SD Card Driver.
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* @details This module implements a generic SDC (Secure Digital Card) driver.
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* @pre In order to use the SDC driver the @p HAL_USE_SDC option
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* must be enabled in @p halconf.h.
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*
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* @section sdc_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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* @if LATEX_PDF
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* @dot
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digraph example {
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size="5, 7";
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rankdir="LR";
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node [shape=circle, fontname=Sans, fontsize=8, fixedsize="true", width="0.9", height="0.9"];
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edge [fontname=Sans, fontsize=8];
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stop [label="SDC_STOP\nLow Power"];
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uninit [label="SDC_UNINIT", style="bold"];
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ready [label="SDC_READY\nClock Enabled"];
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connect [label="SDC_CONNECT\nConnecting"];
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active [label="SDC_ACTIVE\nCard Ready"];
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reading [label="SDC_READING\nReading"];
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writing [label="SDC_WRITING\nWriting"];
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uninit -> stop [label=" sdcInit()", constraint=false];
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stop -> stop [label="\nsdcStop()"];
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stop -> ready [label="\nsdcStart()"];
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ready -> stop [label="\nsdcStop()"];
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ready -> ready [label="\nsdcStart()"];
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ready -> connect [label="\nsdcConnect()"];
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connect -> active [label="\nconnection\nsuccessful"];
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connect -> ready [label="\nconnection\nfailed"];
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active -> ready [label="\nsdcDisconnect()"];
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active -> reading [label="\nsdcRead()"];
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reading -> active [label="\nread finished\nread error"];
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active -> writing [label="\nsdcWrite()"];
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writing -> active [label="\nwrite finished\nwrite error"];
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}
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* @enddot
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* @else
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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=Sans, fontsize=8, fixedsize="true", width="0.9", height="0.9"];
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edge [fontname=Sans, fontsize=8];
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stop [label="SDC_STOP\nLow Power"];
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uninit [label="SDC_UNINIT", style="bold"];
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ready [label="SDC_READY\nClock Enabled"];
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connect [label="SDC_CONNECT\nConnecting"];
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active [label="SDC_ACTIVE\nCard Ready"];
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reading [label="SDC_READING\nReading"];
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writing [label="SDC_WRITING\nWriting"];
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uninit -> stop [label=" sdcInit()", constraint=false];
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stop -> stop [label="\nsdcStop()"];
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stop -> ready [label="\nsdcStart()"];
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ready -> stop [label="\nsdcStop()"];
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ready -> ready [label="\nsdcStart()"];
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ready -> connect [label="\nsdcConnect()"];
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connect -> active [label="\nconnection\nsuccessful"];
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connect -> ready [label="\nconnection\nfailed"];
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active -> ready [label="\nsdcDisconnect()"];
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active -> reading [label="\nsdcRead()"];
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reading -> active [label="\nread finished\nread error"];
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active -> writing [label="\nsdcWrite()"];
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writing -> active [label="\nwrite finished\nwrite error"];
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}
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* @enddot
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* @endif
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*
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* @section sdc_2 SDC Operations.
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* This driver allows to read or write single or multiple 512 bytes blocks
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* on a SD Card.
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*
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* @ingroup IO
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*/
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