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